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تبؤ الاحمال الكهربائية للشبكة العراقية للمدة القصيرة باعتماد نظام المنطق الضبابي == Short - Term Electrical Load Forecasting For Iraqi Power System Based On Fuzzy Logic System

اسم المؤلف: هدى منهي عبد العباس
اسم المشرف: Firas Mohammed Tuaimah
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Load forecasting is used by participants in electric energy generation, transmission, distribution, and marketing for a variety of decision - making processes, such as economic dispatch, unit commitment, hydro - thermal coordination, transaction evaluation, and expansion planning. However, the need for accurate forecasts has intensified in the last decade due to the energy industry deregulation. Taking this into account as well as the rapid fluctuations in demand and abrupt changes in weather condition, access to reliable models for accurate forecast of load demand is essential. Due to the need for accurate load forecasts, numerous statistical and artificial intelligence methods have been proposed for the short - term load forecasting problem.In this study, the Multiple Linear Regression (MLR) method, which is one of the statistical methods, and an Interval Type - 2 Takagi - Sugeno - Kang Fuzzy Logic System (IT - 2 TSK FLS), which is one of the artificial methods and an extension of the conventional fuzzy logic system, were applied. Developed models were trained using the genetic algorithm. With the purpose of an objective assessment, the available dataset was split into training samples (80%, ????????????) and test samples (20%, ??????????). The training data used in this study covered the period from January 1, 2012 to February 1, 2012 for winter season and the period from July 1, 2012 to August 1, 2012 for summer season. The actual load forecasting period started from January 22, till 28, 2012 for winter model and from July 22 till 28, 2012 for summer model.This work suggested two models; the first model was for hourly (24 hour) load forecasting for one day ahead and the second model was for one week ahead in hourly forecasting (from one until 168 hour). For each model, winter and summer seasons were presented. The Main average percentage error (MAPE) term is an index that provides information about the bias of the model and how close forecasts or predictions are to the eventual outcomes. Experiments conducted with real datasets for the Iraqi power system showed that IT2 TSK FLS models precisely approximated future load demands with an acceptable accuracy.The real data for Iraqi power system were taken from Iraqi Operation and Control Office which belongs to the Ministry of Electricity.A computer program, written in MATLAB programming languages, was developed to represent the proposed method.

تحسين تخطيط المسار للروبوتات المتنقلة والمستقلة بالحركة باستخدام خوارزميات الامثلية القائمة على مبدا التجمعات == Improvement of Path Planning For Autonomous Mobile Robots Using Population - Based Optimization Algorithms

اسم المؤلف: فرح مهدي علي
اسم المشرف: نزار هادي عباس
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Autonomous mobile robots are used in various applications such as dangerous regions. These applications demand robust and adaptable methods for path planning.Path planning optimization problem is a fundamental problem for robot navigation; its purpose is to find a collision - free path from the initial position to a target position. Many real - world optimization problems have become increasingly large, complex and dynamic, which require the development of methods and solutions whose efficiency ismeasured by their ability to find acceptable results within a reasonable amount of time.The Artificial Bee Colony (ABC) and Bacterial Foraging Optimization (BFO) algorithms are used for solving hard optimization problems, including path planning. BFO algorithm is a simple and powerful searching technique. On the other hand, Artificial Potential Field (APF) as a real time obstacle avoidance method is quite simple in theory, but it is easy to bring local minimum problem and failing to find a path in the narrow channel. Therefore, a method for hybridizing APF with BFO is introduced to make use of both methods' advantages. This thesis presents efficient and reliable four optimization algorithms to solve the path planning problem. The first two algorithms are developed based on ABC algorithm as global path planning; they specifically are modified version of ABC algorithm called Directed ABC (DABC) algorithm and a new fitness function added to ABC algorithm named Minimum Angles (MAABC) algorithm was developed. The other two algorithms were proposed based on BFO and APF algorithms as local path planning; they were namely improved versions of BFO algorithm with adaptive step size (ASBFO) algorithm and a proposed version of BFO algorithm with an adaptive tumble (ATBFO) algorithm.The developed algorithms were simulated using MATLAB R2011b package. The simulation results showed that these algorithms could find the shortest paths for even crowded environments. Moreover, these algorithmswere compared with other researchers’ work to evaluate their performance. Additionally, a comparison was made between the executing time of the proposed local path planning algorithms (ASBFO and ATBFO algorithms) and the real tracked military robot (e.g., Talon) to verify the capability of the proposed methods. Both algorithms achieved fast run time, approximately three times faster than Talon for complex environment, which made them practically efficient.

تجزئة الحزمة لالغاء الضوضاء المتكيف في تنقية الاشارة الكلامية == Subband Decomposition For Adaptive Noise Cancellation In Speech Enhancement

اسم المؤلف: حوراء فاضل عبيد
اسم المشرف: منال جميل الكندي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Nowadays speech processing methods are usually implemented in the time or frequency domain. Filter bank can be considered as a divide and conquer approach within signal processing, since large problems are sub - divided into many smaller problems. While filter banks are essential components of speech processing, and in signal processing in general, they will have the focus in present days. An adaptive filter is a filter that self adjusts its transfer function according to its optimizing algorithms. Least mean square algorithm has slow convergence when used with nonstationary signals like speech and it has high computational cost but normalization of step size (or input signal) leads to a useful variant of the LMS algorithm known as the normalized LMS (NLMS) algorithm, which gives better convergence characteristics than the LMS because it uses a variable step - size with respect to the input signal power.To improve the convergence rate and/or computational complexity and also to overcome the disadvantage of a full band adaptive filtering, a structure is illustrated that is subband adaptive filtering; this will converge faster at a lower computational cost for speech and white noise inputs.This research shows most types of subband decomposition structures and makes comparison among them based on their performance to cancel the noise with minimum computational complexity, maximum convergence speed and maximum noise cancellation with lowest delay.Moreover three new hybrid tree configurations or the tree decom - position are proposed to maximize the overall performance of adaptive noisecancellation system.They are given the abbreviations HTPSAF1,HTPSAF2 and HTPSAF3. These three systems use polyphase filter bank that has showed a noticeable increase in the convergence speed and large reduction in the computational complexity due to the lower number of coefficients that can be achieved for the analysis/synthesis filters, which in turn will result in minimum delay in the reconstructed output speech signal.The algorithm of subband decomposition structures has been described theoretically then modeled under MATLAB simulation program using built - in filters and real input signals.

تصميم وتنفيذ منظومة مقاييس متوزعة ذكية == Design And Implementation of A Smart Distributed Metering System

اسم المؤلف: مهند غازي خميس
اسم المشرف: عدي عبد اللطيف عبد الرضا
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This work is concerned with designing and implementing a smart energy metering system that consists of two smart energy meters and a billing center. The designed smart energy meter is a single phase meter in which the amount of consumed energy is calculated using PIC18F45K22 (which is a Peripheral Interface Controller (PIC)) and utilizing ACS758 (which is a Hall - effect based liner current sensor Integrated Circuit (IC)).The amount of consumed energy is sent to the billing center (which is implemented by using a laptop) for issuing the bills. The billing center receives the consumption data and sends the switching commands by utilizing an external communication technology. After comparing various communication technologies, ZigBee is chosen for this work.Two smart energy meters are implemented to test various communication conditions, such as multi - hopping. The design of the two smart energy meters differ only in the ZigBee addresses in the network.The program for the PIC's in the smart meters is written with MikroC PRO V6.0.1, while the program for the laptop in the billing center is written with Visual BASIC 6.

تحسين استقرارية منظومة الشبكة العراقية (kV 400) باستعمال افضل جهاز من اجهزة ال FACTS == Stability Improvement of The (400kV) Iraqi Grid Using The Best FACTS Device

اسم المؤلف: شيماء شكري عبد الحليم
اسم المشرف: رشيد حميد الربيعي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يعتبر نظام القدره الكهربائيه من الانظمه الضخمه والمعقده لاحتوائها على عدد كبير من محطات التوليد وخطوط النقل واجهزة السيطرة لذلك فانه يخضع الى تغيرات مفاجئه في مستويات الحمل، حيث اصبح من الصعب جدا الحفاظ على نظام مستقرمع التغيرات التي يشهدها النظام, لذلك | Electrical power system has become large and complicated so it is susceptible to sudden changes in load levels. Stability is an important concept which determines the stable operation of power system.The modern trend is to employ Flexible Alternating Current Transmission System (FACTS) devices in the system for effective utilization of transmission resources. The FACTS devices contribute to power flow improvement besides they extend their services in transient stability improvement as well, study and analyze the stability of system through rotor angle and voltage. The objective of this work is to improve the transient stability of the Iraqi National Super Grid System (INSGS) by using best FACTS device in different optimal locations under fault conditions. Two test systems are studied, the first system is IEEE 9 - bus test system, and the second system is the Iraqi (400 kV) electrical network 24 - bus bars, three phase to ground fault, temporary fault and permanent fault are tested. The load flow program was implemented using Newton - Raphson method and the numerical solutions of non - linear differential equations are solved using Trapezoidal method. The programs that are used in this work are implemented using MATLAB 7.12.0(R2011a) package based on Power System Analysis Toolbox (PSAT version 2.1.6)software.copyright © 2002 - 2010 by Federico Milano as Graphical User Interface. A comparison has been made between five types of FACTS (UPFC, SSSC, TCSC, SVC, STATCOM) at optimal locations of the Iraqi grid and 9 - bus test system to get optimal FACTS devices by (voltage stability and rotor angle stability). The results obtained show that Unified Power Flow Controller (UPFC) is an optimal device for improvement the stability by damping the voltage and rotor angle oscillations.

التشوه بالتوافقيات في اشارات التدفق للمتحسس السعوي الحيزي المثبت خارجيا == Harmonic Distortion In The Flow Signals of Externally Mounted Capacitive Spatial Filter

اسم المؤلف: مروه مالك حسوني
اسم المشرف: عباس احمد الشالجي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This thesis investigates the performance of some windows on the flow signals that are generated from the planar capacitance spatial filter (PCSF) according to the moving of the solid particle in the channel of the filter. The sensor that operates as non - invasive device for solid flow measurement utilizes the thin wall of a dielectric pipe section as a shielding layer to protect the sensor from erosion, rust and moisture, and to make it more versatile.The finite - difference model equations are solved using successive over relaxation (SOR) methods. The waveforms show that the response of the PCSF is spatially - biased towards particle flowing closer to the plane of sensing electrodes and that the resulting flow signal is non - sinusoidal. The SOR method that is used to compute the PCSF potential fields has been investigated using a mesh of 110 by 32 nodes, and the algorithm was programmed in MATLAB (Release 2013a) using an Intel core ™ i3 PC,CPU processor.To study the effect of the total harmonic distortion (THD) content on the flow signals that are calculated with respect to the fundamental frequency of the power spectrum density through a specific quantitative criterion, this work comprises a comparative study among three types of windows; Hanning, Hamming, and a subOptimal window called the Kaiser window.The effect of particle flying heights, relative permittivity and size on the THD of the flow signal were examined. It was found that theTHD of flow signals at heights closer to the plane of sensing electrodes is high and decreasing gradualy when the particle flying height is far above the sensor. All the three windows used in this work have better suppression of harmonics distortion as compared with unwindowed (raw) flow signal.

تمثيل وتنفيذ العاكس ثلاثي الطور رباعي السيقان بواسطة طريقة المتجه الفضائي بتضمين عرض النبضة == Modeling And Implementation of Space Vector PWM Four - Leg Three Phase Inverter

اسم المؤلف: لؤي كمال عبد القادر
اسم المشرف: فاضل عباس مهدي القرملي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The thesis considers a three - phase four - leg inverter, which is used to supply unequal loads without using a transformer. In the literatures, a three - dimensional modulation technique, requiring complex mathematical algorithms were proposed for this kind of inverter. In this research a different approaches are discussed through two kinds of controller; first type is based on the separation control method of the fourth - leg of the inverter from the other phases for one type for modulation. This research applied to the three - phase inverter of the traditional SVM techniques avoiding the employment of complex procedures. The voltage modulation method based on a triangular carrier waveform for the three - phase four - leg voltage source converter. The four - leg converter can produce three - phase output voltages independently from the additional forth - leg. The proposed modulation method for the four - leg inverter is implemented with a single carrier by a simple useful “offset voltage” concept. The second type is equivalent to the so - called three - dimensional space vector PWM method, but its implementation is much easier. The simultaneously synthesized equations of the maximum magnitude of unbalanced three - phase voltage.The feasibility of the proposed modulation technique types verified by computer simulation and experimental results. These results show that both types of “Carrier - Based Pulse Width Modulation (PWM) technique” and “Three Dimensional Space Vector Modulation Technique” are easier implemented than conventional type by using microcontroller component (PIC16F874A/877A) instead of digital components (DSP & FPGA). So this thesis offers a prototype for this circuit with low cost and low harmonics, but with more complex control circuit.

تحليل الاتصال بين القمر الصناعي والطائرة باستخدام نموذج تعقب الشعاع == Analysis of Satellite - To - Aircraft Communications Using Ray Tracing Model

اسم المؤلف: علي محمد علي
اسم المشرف: جابر سلمان عزيز
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2008
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: While the aircraft flying above the earth surface, the signal transmitted from the satellite to the aircraft suffered from changes in it's characteristics at the aircraft receiver's antenna according to many factors affecting the direct and reflected power from the earth surface such as the distance difference, the nature of the earth surface, elevation angle, Doppler shift, etc… This Thesis introduces a proposed algorithm to analyze and simulate the communication link between the Satellite and the aircraft taking into account all the parameters that affect the magnitude of the power and signal characteristics received at the aircraft antenna. The proposed method uses the ray - tracing technique in this simulation to analyze the communication link between the Satellite and aircraft. The simulation developed in this thesis has minimized the error percentage as much as possible taking into account most of the factors that might affect the characteristics of the signal received by the aircraft from the satellite. This simulation considers the free space loss, specular reflection losses, scattering factor, earth curvature effect, etc…,also the simulation takes into account the Doppler effect that caused by the aircraft movements. The simulation measures the received signal strength and fading characteristics of satellite to aircraft communication to determine the effectiveness of communication and to establish parameters which can be useful to the communication system designer in Iraq and the rest of the world. MATLAB® v6.5 used in the simulation as application software, the simulation also applied to MATLAB® v7.0.

تحليل المسار النازل لنظام الاتصال اللاسلكي التكيفي المتعدد المداخل والمخارج والمستخدمين == Analysis of Adaptive Downlink Multiuser Mimo Wireless Communication System

اسم المؤلف: عمر جبار ابراهیم
اسم المشرف: رعد سامي فياض
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Multiple - input multiple - output (MIMO) wireless communication systems have received significant attention due to their enormous channel capacity potential in rich scattering environment. Such systems need to consider multiuser transmission / reception in their design. This thesis investigates theoretically the ergodic capacity of multiuser MIMO systems operating with adaptive techniques to enhance their performance. The ergodic capacity of multiuser MIMO system is analyzed and simulated for three types of channels : additive white Gaussian noise (AWGN) channel, uncorrelated Rayleigh fading (URF) channel, and semicorrelated Rayleigh fading (SRF) channel. The downlink SRF channel for each user is modeled by assuming that the fading is correlated at the transmitter but uncorrelated at the receiver side. The simulation results are compared to those related to a single - user system and used as a guideline to present an adaptivetechnique to enhance the capacity of MIMO system operating in SRF channel. The adaptive technique is based on a tradeoff between time division multiple access (TDMA) and block diagonalization (BD).Simulation results are presented using MATLAB environment to address the dependence of ergodic capacity of a MIMO communication on various system and channel parameters. The results indicate clearly that the threshold level of angle between users ? employed in the adaptive system must be chosen carefully to maximize the ergodic capacity. The optimum threshold ?th is equal to 24°, 42° and 47°, for angle spread ? = 5°, 50° and 75°, respectively

طرائق الكشف للتضمين الترددي المتعامد للرابط النازل في نظام تطور طويل الامد (LTE) == Detection Methods For Ofdm Downlink In Long Term Evolution (LTE) System

اسم المؤلف: اكرم جبار عبد الحسين حسن
اسم المشرف: يمان اسماعيل مجيد
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: GPP3 التطور على المدى الطويل (LTE) هو تقنية الجيل الرابع اللاسلكية ذات النطاق العريض. هدفه الرئيسي هو تعزيز الكفاءة الطيفية باستخدام تقنيات التضمين الترددي المتعامد بالتقسيم (OFDM). ومع ذلك، ياتي هذا التحسن في الاداء بزيادة التعقيد الحسابي في اجهزة الاستق | 3GPP Long Term Evolution (LTE) is the fourth generation mobile wireless broadband technology. Its key objective is to enhanced spectral efficiency by using Orthogonal Frequency Division Multiplexing (OFDM) techniques. However, this performance improvement comes at the cost of increased computational complexity in the receiver. The goal of this work is to introduce a detection method that gives a better performance with reasonable computational complexity for LTE mobile communication system. An approximated linear baseband model for the two modulation techniques used by the LTE system (which is the Quadrature Phase Shift Keying (QPSK) and sixteen - level Amplitude Modulation (16 - QAM)) have been derived. Three receivers have been simulated and tested. The three receivers use Least Square (LS) channel estimator. These receivers uses channel compensator, decision feedback equalizer and perturbation algorithm. The LTE communication system has been simulated using MATLAB®7 programming language. The results of the computer simulation show that the perturbation algorithm gives an enhancement in the receiver performance of about 2 dB in different mobile channels than decision feedback equalizer and about 5 dB than channel compensator at the 10 - 3 of BER.

بناء خوارزمية تزامن لانظمة (OFDM) باستخدام معالجة الاشارة الرقمية == Dsp - Based Synchronization Algorithm Implementation For OFDM System

اسم المؤلف: رائد ستار جبر
اسم المشرف: محمود عبد القادر عبد الستار
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعدد الارسال للتردد بالتقسيم المتعامد (OFDM) هو مفتاح تمكين التكنولوجيا لمعظم انظمة الاتصالات اللاسلكية الحالية ذات معدل نقل البيانات العالي. والميزة الرئيسية للـ (OFDM) مقارنة بالطرق التقليدية هو انه يحول القناة ذات النطاق العريض الى قنوات فرعية ضيقة متو | Orthogonal Frequency Division Multiplexing (OFDM) is the key enabling technology for most current high data - rate wireless communication systems. The primary advantage of OFDM over conventional schemes is that it converts a wideband channel into parallel narrowband sub - channels allowing relatively simple channel estimation and frequency domain equalization. It is as an effective technique for coping with channel impairments like multipath propagation and Inter Symbol Interference (ISI) by making use of an appropriate cyclic prefix. One of the major drawbacks of OFDM is that it is more sensitive to synchronization errors than its single carrier counterparts. This thesis describes a real - time implementation of a timing and frequency synchronization for OFDM system using MATLAB software Simulink, DSP processor TMS320C6713 and Code Composer Studio (CCS). The hardware interface converts the baseband signal from the PC to the DSP Processor. Basic transmission and reception performances are evaluated in real time using Real Time data Transfer (RTDX). The practical results and performance evaluation of the synchronization algorithms in OFDM system is presented and discussed. The results are plotted for different offsets of CFO and STO with different values of signal to noise ratio. Also the bit error rate (BER) and the mean square error (MSE) of the system is analyzed. The results show that the time offset more effect than frequency offset because of ISI and ICI occurs when time offset occur in the system. The synchronization algorithm is found to be robust for both CFO and STO simultaneously. It can handle offset of about CFO = 500 Hz and STO = 14 samples simultaneously without wasting extra bandwidth. This algorithm used for synchronization more robust for 16QAM compared with 4QAM modulation.

التركيب السليكوني النانوي في الخلايا الشمسية == Nanostructured Silicon Based On Solar Cells

اسم المؤلف: نور احمد سلمان
اسم المشرف: ثائرة زكريا الطيار
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعتبر الخلايا الشمسية تكنولوجيا واعدة وقابلة للتجديد حيث ازداد الطلب عليها نتيجة لزيادة الاهتمام بالطاقة الكهروضوئية. ان التحسين المستمر لكفاءة الخلايا الشمسية بايجاد التقنيات والمفاهيم الجديدة يجب ان يمتد على نحو متزايد باعتبارها واحدة من اهم مصادر الط | The demand for solar cells has been growing rapidly with an increasing social interest in photovoltaic energy. The improvement of energy conversion efficiency of solar cells is performed by developing the technology and concepts that have been increasingly extended as one of the key components in our future global energy supplement. But, the main problem of photovoltaic modules are their rather high production and energy cost. Three generations of solar cell technologies have been established in the previous century.Nanostructured silicon substrates based on p - type crystalline Silicon (c - Si) have been prepared in this work. Electrochemical Etching (ECE) of the Silicon (Si) wafers in Hydrofluoric (HF) acid was employed to synthesize porous layers consisting of silicon nanostructures. The process was carried out at different etching time and different current densities which are considered as effective parameters in ECE process. It is found that a homogeneous porous layer could be obtained with porosity value of (87%) when the current density is (60 mA/ cm2) and the etching time of (10 min). Among the Transparent Conductive Oxide (TCO) materials available, Zinc Oxide (ZnO) films show promising electrical and optical properties in combination with low cost alternatives. It can function as Anti - Reflecting Coating (ARC), window material, transparent electrode and active layer in heterojunction solar cells. n - type ZnO thin films are grown on p - type nanostructured silicon substrates by using Pulsed Laser Deposition (PLD) technique with Q - switching Nd : YAG laser beam Second Harmonic Generation (SHG) [?=(532 nm), number of pulses (140) pulses, and laser energy (820 mJ)], vacuum of (10 - 3 Torr), ambient oxygen pressure of (10 - 1 Torr), and substrate temperature of (400 °C). The morphological, optical, chemical and structural properties were investigated using Atomic Force Microscopy (AFM), Ultraviolet - Visible (UV - VIS) spectroscopy, Fourier Transform Infrared (FTIR) spectroscopy, and X?Ray Diffraction (XRD) techniques, respectively.Surface morphology and optical properties results show densely packed highly crystalline growth of ZnO thin film on nanostructured silicon substrate grown at optimum condition with an average grain size around (88.57 nm). The average roughness, root mean square, and ten - point height estimated from AFM quantitative analysis, are found to be (3.02 nm), (3.62 nm), and (8.76nm) respectively. The thickness is calculated and found to be (100 nm). The film shows high transparency (above 80%) and the estimated Energy - gap (Eg) is found to be about (3.4 eV). This is important for its applications as transparent conductive films and solar cell windows. The chemical and structural properties results characterize ZnO at (420 cm - 1) and (766 cm - 1) absorption bands respectively and the thin film is polycrystalline with hexagonal Wurtzite structure.

محاكاة GSM/EDGE وGSM لنظام الاتصالات المتنقلة == Simulation of GSM And GSM/EDGE Mobile Communication Systems

اسم المؤلف: اسامة علي عبد الله
اسم المشرف: رعد سامي فياض
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The introduction of global system for mobile communication (GSM) air interface has undoubtedly created a new area in telecommunications. In view of its extensive use in real world applications, it is highly desirable to further investigate the performance of the GSM system under different operating conditions and environments. Furthermore, there is increasing interest in using high - level modulation to provide enhanced data rate for GSM evolution (EDGE).This thesis investigates the performance of both GSM and GSM/EDGE systems operating in Raleigh fading channel. The results are reported for different models of fading channel in order to describe various environments. A detailed SIMULINK model is developed in MATLAB environment to simulate the GSM system. Furthermore, a MATLAB software package is developed to simulate extensively the EDGE system. Both simulation models are handled to characterize each essential part in these systems. The simulation takes into account channel coding, modulation type, interleaving and burst building, multipath channel effect, channel estimation, and detection process.The simulation results indicate clearly that to achieve a bit error rate (BER) of 1x10P - 5 P in additive white Gaussian noise (AWGN) channel, the signal - to - noise (SNR) ratio should be 5.25, 3.75 and 12.25 dB when GSM, MCS - 1 EDGE (GMSK modulation), and MCS - 7 EDGE (3?/8 - 8PSK modulation) systems are used , respectively. These values are to be compared with R12R.43, R1R0.21 and R2R1.05 dB, respectively, for HT100 - type fading channel. The MSC - 1 system offers the best BER characteristics followed by GSM system. The MCS - 7 offers the worst BER characteristics among the three systems.

تصميم وتنفيذ ذراع الي موجه عن طريق اشارة تخطيط العضلات باستخدام المتحكم الدقيق == Design And Implementation of A Robot Arm Driven By EMG Signal Based On Microcontroller Unit

اسم المؤلف: انس عبد الحميد كاظم
اسم المشرف: خالدة شعبان رجب
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعتبر اشارة (EMG) هي الاشارة المكتشفة على سطح الجلد فوق العضلة والمتولدة من مصدر المجال الكهريائي عند التقلص العضلي. الاشارة العضلية بصورة رئيسية في مجالين : تشخيص الخلل العضلي واشارة تحكم لسياقة ذراع الي، يستخدم الذراع الالي المساق بواسطة الاشارة العضلي | Electromyogram (EMG) is a signal detected on the skin above a muscle and generated by sources of electric field within the muscle during contraction. EMG signal is used mainly in two fields; Muscle disorder diagnostic and control signal for driving robotic arm. The robot arm driven by EMG is used as a remote control in hazard places or as prosthesis part for limbs of disabled. The first part presents placing array of EMG electrode on two muscles and measure the EMG signal, design acquisition circuit to optimize the EMG signal for two muscles; hardware circuit that designed will eliminate the noise resulting from cable, electrodes, 50Hz and aliasing. In order to monitor and record EMG signal, Data Acquisition System (DAQ) is designed for this purpose using Arduino platform, which gives the ability to deal with signal. The real time signal was taken from three persons with different weights and ages. The second part includes a proposed design of digital filter with windowing and applying to real time signal to compare the results for many times of orders and types of windowing in order to meet the best criteria. The FIR filter with 8th order will be chosen as digital filter with Hann windowing that is apply to eliminate the EMG noise that is caused from many sources and results optimum EMG signal that is used to control robot arm, implementing digital filter characteristic into dsPIC30F4013 which it signal processing microcontroller and using the filtered signal to control the robot arm by interfacing with DC driver to drive robotic arm with two degrees of freedom (2 - DOF). Also, this part includes the technique which simulates the results using MATLAB 2011a to control the movements of the robotic arm. Micro C for dsPIC© is used to write C code for FIR digital filter and loops with control algorithm to enable the controlling robot arm.

تقليل التاثيرات اللاخطية في منظومات التقسيم المتعدد للطول الموجي العالية الكثافة == Mitigation of Fiber Nonlinearity Effects In Ultra High - Dence WDM System

اسم المؤلف: سيف حسام عبد الواحد
اسم المشرف: علي يوسف فتاح
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The optical signal is severely degraded when transmitted in the fiber due to both the linear and nonlinear distortions. It is well known that, the linear distortions in single mode fiber include chromatic dispersion (CD) and polarization - mode dispersion (PMD) while self - phase modulation (SPM), cross phase modulation (XPM) and four - wave mixing (FWM) are considered the most among nonlinear distortions. To deal with the nonlinear impairments, a number of techniques, such as electronic equalization, pre - coding, digital back - propagation(BP), pre - chirping, optical phase conjugation (OPC) and nonlinearity management, are developed and improved. In the present work, a method called Fractional Fourier Transform (FRFT) has been applied to mitigate fiber nonlinearity impairments. The Fractional Fourier Transform is a time - frequency distribution and an extension of the classical Fourier transform. Time domain FRFT can be implemented by using time lens according to the optical time - space duality theory. The modulated optical pulses will be pre - distorted by an FRFT module before being launched into fiber links. In this work, 10 Gb/s optical fiber system with five spans, each of length 60 Km, for three types of modulation formats (Return - to - Zero Differential Phase Shift Keying (RZ - DPSK), Return - to - Zero Differential Quaternary Phase Shift Keying (RZ - DQPSK) and Carrier - Suppressed Return - to - Zero (CSRZ)), single and multi - channel transmission systems are designed and simulated using “OptiSystem (2011) version 10.0” software package. In order to analyze the transmission performance of the simulated systems without and with FRFT, a set of eye diagrams, optical spectrum visualizers, Q - factor versus input power and Bite Error Rate (BER) versus Signal to Noise Ratio (SNR) curves are presented to evaluate the influence of FRFTon the system performance. For CSRZ modulation format the Q - factor for single channel system at 0 dBm (input power) was 43.5 without FRFT and 78 with FRFT. The BER of sixteen channel system (channel No.8) at bit rate 10 Gb/s per channel, 300 Km link length of CSRZ modulation format with channel spacing of 50 GHz at SNR 10 dB without FRFT is 10 - 4.8 and 10 - 7.4 with FRFT. The BER of thirty two channel system (channel No.16) at bit rate 10 Gb/s per channel, 300 Km link length of CSRZ modulation format with channel spacing of 50 GHz at SNR 10 dB without FRFT is 10 - 4.6 and 10 - 6.4 with FRFT. The BER of thirty two channel system (channel No.16) at bit rate 10 Gb/s per channel, 300 Km link length of CSRZ modulation format with channel spacing of 25 GHz at SNR 10 dB without FRFT is 10 - 2.56 and 10 - 3.24 with FRFT.

تاثير اللاخطية في الالياف البصرية على اداء نظام تجميع الاطوال الموجية الضوئية المنقسمة باستخدام تقنية الاستقطاب المزدوج لتقسيمات التردد المتعامد الضوئي == Effect of Fiber Nonlinearity On The Performance of WDM Optical Systems Using Dual Polarization CO - OFDM Technique

اسم المؤلف: بشار مظفر احمد
اسم المشرف: رعد سامي فياض
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The implemented existing high capacity optical networks are based on 50 GHz wavelength - division multiplexing (WDM) channel spacing and carry up to 50 Gb/s data rate per channel. In recent years, there is increasing interest in using dual - polarization (DP) technique to enable future systems with at least 100 Gb/s rate per channel to operate over existing optical networks. The performance of these advanced systems can be enhanced further by using coherent optical orthogonal frequency division multiplexing (CO - OFDM) technique which offers high spectral efficiency and outstanding tolerance of fiber dispersion.This thesis addresses the effect of fiber nonlinear optics on the performance of dual polarization CO - OFDM/WDM system operating with 100 Gb/s per channel. Different modulation formats, namely BPSK, QPSK and 16 - QAM, are used. First, the performance of a single - channel system is investigated in the absence and presence of fiber nonlinearity. The results are compared with those of a conventional (single - polarization) system to identify the key role played by the DP technique. The investigation is then extended to WDM systems incorporating DP - OFDM technique. The results reveal that the effect of fiber nonlinearity can be reduced or cancelled by using optimum transmitter laser power Popt. Further, the value of Popt is a function of transmission distance,number of multiplexed channels, and modulation formats. Popt of - 11, - 12, and - 5 dBm is needed for a ten - channel DP system operating with BPSK, QPSK, and 16 - QAM formats, respectively.Simulation results presented in this thesis are obtained using OptiSystem (version 11.1) which is a commercial software package.

الموقع الامثل للمعوض التزامني الثابث لشبكة الضغط الفائق العراقية باستخدام الخوارزمية الجينية == Optimal Location of Static Synchronous Compensator (STATCOM) For Iraqi National (400kV) Super High Voltage Grid Using Genetic Algorithm

اسم المؤلف: حسن علي عبد المجيد سلبي البياتي
اسم المشرف: Firas Mohammed Tuaimah
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Transmission networks of modern power systems are becoming increasingly stressed because of the growing demand and restrictions on constructions new lines. One of the consequences of such a stressed system is the threat of losing stability following adisturbance. Flexible AC Transmission System (FACTS) devices are found to be very effective in a transmission network for better utilization of its existing facilities without sacrificing the desired stability margin.The Static Synchronous Compensator (STATCOM) is a shunt device which employs one of the latest technologies of FACTS and power electronic switching devices in electric power transmission systems to control the voltage and power flow. The STATCOMregulates the voltage at its terminal by controlling the amount of reactive power injected into or absorbed from the power system.Whilst the Iraqi National (400 kV) Super High Voltage Grid System suffers from voltage stability problems because of the high variation in the reactive power conditions all over the year seasons. Therefore, this thesis proposed an application of the STATCOM devices to maintain the voltages within the specified limits and enhancing voltage stability for all seasons in the year, as well as reducing the apparent power losses. And in order to reduce therequired installation cost of the STATCOM devices, this performance has been done by using minimum possible size of the reactive power injected or absorbed by the STATCOM devices, while satisfying the stability limits.The benefit of the STATCOM devices depends greatly on how these devices can be placed in the system. The general problem focused in this thesis was how to optimally determine the locations and the sizes of the STATCOM devices that to be installed. For thatreason, it was decided to follow an optimization approach such as a Genetic Algorithm (GA), which is one of the heuristic methods to find the optimum location and the value of installed STATCOM devices.The Newton - Raphson load flow method, with the proposed approach has been examined and tested first on the 5 - bus IEEE test system; the results obtained encouraged us to implement the same approach on the 27 - bus Iraqi National (400kV) SHV Grid System.The real data for Iraqi network have been taken from Iraqi National Control Center (INCC), in the Ministry of Electricity.computer program, written in MatLab environment, was developed to represent the proposed method.

خوارزمية جديدة لنظام اخفاء المعلومات == New Algorithm For A Steganography System

اسم المؤلف: مروة جليل محسن
اسم المشرف: اثير علاء صبري
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This thesis presents a new steganographic algorithm for embedding encrypted secret image in grayscale and color images to provide high level security of data for communication over unsecured channels.The proposed algorithm combine the features of Cryptography and Steganography. The hidden secret message capacity, stego - image quality and security are three important conditions for data hiding technology. According to these requirements, an effective security protection with high hiding capacity steganographic algorithms are proposed based on frequency domain of the cover and the secret image.The proposed algorithm first analyzes the secret image into its frequency components using Discrete wavelet transform (DWT) , Wavelet packet transform(WPT) , Multiwavelet transform(MWT) , and slantlet transform(SLT) , respectively. Then the low frequencycomponent of the secret image is encrypted using Advanced encrypted standard (AES) method and then embedded in the insensitive mid and high sub - bands obtained from the cover image after applying these transformations (mentioned earlier) on it. The embedding method used in this thesis is LSB (Least significant bit ) method. The resulting stego image from different algorithms are then compared..The effectiveness of the proposed algorithm has been estimated by computing Mean square error (MSE) ,signal to noise ratio (SNR), Peak Signal to Noise Ratio (PSNR) and the capacity.The best algorithm is obtained by using 2level - DWT for cover image and 1level - DWT or WPT for secret image because the capacity of the hidden secret data and stego image quality are improved. The embedding image reaches to half the size of cover image at same time PSNR reach to 62 dB and MSE about 0.036 and this is better than many other existence algorithms.By both objective and subjective observations, the resultant stegoimage that will be transmitted does not draw any suspicion, so the main goal of steganography is achieved..The language used for testing the algorithms is MATLAB R2013a, with a computer of the following specification ; Processor : Intel(R) Core(TM) i5 CPU M430 @ 2.27GHz and RAM - 3GBytes.

اخفاء العلامة المائية الرقمية باستخدام تحويل الموجيات ذات عامل جودة قابل للتعديل == Digital Watermarking Based On Tunable Q - Wavelet Transform

اسم المؤلف: هاجر احمد ابراهيم
اسم المشرف: اثير علاء صبري
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: لقد دخلنا عصر حيث المعدات غير المكلفة متوفرة ويمكن من خلالها انتاج نسخ كاملة من المواد المتعددة الوسائط الرقمية مثل صوتيات بجودة القرص المضغوط ونشر صور عالية الجودة او مقاطع الفيديو الرقمية. من خلال هذه البيئة اصبح من السهل على الجهات غير المختصة انتاج ن | We have entered an era where inexpensive and readily available equipment can produce perfect copies of digital multimedia materials, such as CD - quality audio, publication - quality images, or digital video. In this environment, it has become easier for malicious parties to make salable copies of copyrighted content without compensation to the content owner.Many media content owners are concerned about the potential loss of revenue from multimedia piracy, especially when the content will be exposed to the Internet. Digital watermarking is seen by many as a potential solution to this problem.In this thesis, two proposed methods one for grayscale image watermarking and the other for color image watermarking are suggested. They require the original image for watermark extraction and they are belonging to the wavelet domain watermarking. They exploit the Tunable Q_Wavelet Transform. Therefore, different cases are performed to identify the best among them for the proposed application. As a result of the testing process, the best case is founded when ( Q=4, r=8, J=28). The first proposed method can be used with applications requiring high degree of imperceptibility and high security. The embedding process of this method is based on adding the pseudorandom watermark bits in the largest TQWT coefficient.The second proposed method is more robust against distortions than the first proposed method and is characterized by an acceptable degree of imperceptibility and high security. The embedding process of this method is based on adding the compound watermark image to the original color image.They are performed using MATLAB7 programming language. Different images are tested and the watermark is extracted exactly from the watermarked images.The Peak Signal to Noise Ratio “PSNR” using best case for the two proposed methods is found (77.97) dB for the first method and (51.14) dB for the second method.

تحديد منظومة كفوءة للقدرة الفوتوضوئية المستقلة بناءا على الاجواء العراقية == Investigation Into Efficient Stand - Alone Photovoltaic System Based On Iraq Climate

اسم المؤلف: انسام صبحي جبار
اسم المشرف: محمد مؤنس عز الدين
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الطاقة الشمسية هي احدى الطاقات المتجددة التي تمتاز بانها امنة وصديقه للبيئة. عالميا هناك توجه كبير لهذة الانواع من الطاقات للحد من مشاكل التلوث والاحتباس الحراري. شهدت السنوات الاخيرة انخفاض في اسعار منظومات الطاقة الشمسية وكذلك ارتفاع كفائتها مما ساعد وب | Solar energy is safe as well as clean. It is one type of renewable energy , the energy does not cause pollutions and is not harmful to the environment. It is gaining importance now with the increases in global warming and pollution causing the adoption of renewable energy sources as alternative energy sources. For these reasons, the technological advance seeks to reduce the cost of renewable energy and increase efficiency to expand its reach.This work investigates the best strategy for design the solar energy system of stand - alone type. The stand - alone system consists of the PV array, maximum power point tracking, DC - DC converters, charge controller, battery, load and inverter. Standard specifications are used to ensure the successful operation of any system designed according to this method.The proposed method in this work includes calculation by using Microsoft Excel and simulation of long term periods especially during the autonomy days operation by using Matlab/Simulink. Many cases are studied, a suitable PV power system is introduced for each case. The results of the design of the case study are quite in agreement with published results.The objective of this work is to design solar energy systems for hypothetical loads according to Iraqi climate, this aim is achieved because the designed system passed many tests, especially for the worst case of operation. The investigation shows that the system is capable of exhibiting a reliable operation for any weather condition.

تصميم مضخمات قدرة راديوية التردد بتقنية CMOS مع محولات جامعة للقدرة == Design of RF Power Amplifiers With Power Combining Transformers

اسم المؤلف: سهاد حسين جاسم
اسم المشرف: احمد سعدون عز الدين
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: باستخدام تقنية CMOS، تواجه تكامل مضخمات القدرة العديد من التحديات بمستوى الواط والمستخدمة لتطبيقات الاتصالات اللاسلكية. وللتغلب على هذه المحددات، يمكن استخدام عدد من الوسائل واطئة الفولتية ودمجها بكفاءة باستخدام المحولات على الرقاقة لزيادة قدرة الخرج النا | In CMOS technology, many challenges face the integrated watt level power amplifiers (PAs) used in wireless applications. Consequently, to overcome these limits, several low voltage devices should be combined efficiently with on - chip transformers in order to increase the resulting output power. In this work, two high - performance Radio - Frequency (RF) power amplifiers for watt level applications are designed and simulated in deep submicron (0.13 µm) CMOS process technology using “Agilent Advanced Design System ADS 2011.10 with “BSIM4” as a simulation module for Metal - Oxide - Semiconductor Field - Effect Transistor (MOSFET) devices. The design includes a comparison for the conventional transformer combining techniques SCT, PCT and the hybrid type PSCT. The amplifiers incorporate a parallel combination of four differential PA cores to generate high output power with good efficiency and linearity. The first part of the work presents a design for a watt - level class - AB power amplifier based on transformer type power combiner PSCT for WLAN applications. The PA delivers an Output Power (Pout) of 30 dBm, Power Gain (Gp) of 30 dB and 40% Power Added Efficiency (PAE) under 2.5 V supply. In the second part of the work, a class - E PA based on transformer type power combiner PSCT is designed. The power amplifier provides an output power of 30 dBm, power gain of 30 dB, and 54% PAE at 2.45 GHz under 1.6 V supply. Finally, in the third part of this work, an on - chip output transformer layout for the proposed power amplifiers is designed and simulated with momentum RF EM simulator of ADS 2011.10 in order to realize a fully integrated power amplifier. The simulated efficiency of the PSCT was 78% with minimum insertion losses (ILmin) 0.87 dB.

تصميم متحكم ذكي لنظام تتبع شمسي بالاعتماد على مصفوفة البوابات الرقمية القابلة للبرمجة == Design of Intelligent Controller For Solar Tracking System Based On FPGA

اسم المؤلف: ياسر محمد عبد
اسم المشرف: حنان عبد الرضا عكار
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان الحاجة لزيادة توليد الطاقة الكهربائية جعل استخدام الخلايا الشمسية تلعب دورا هاما في الحياة اليومية، وعليه من المهم استخدام نظام يسمح بتتبع الخلايا الشمسية لضوء الشمس لزيادة او الحصول على القيمة المثلى للطاقة الكهربائية من الخلايا الشمسية. تم في هذا ا | The need to increase the energy generation makes the use of solar cells plays an important role in the daily life. For this reason, it is important to use solar tracking system to increase or getting almost optimum value from solar cells. In this thesis, solar cells model was implemented using MATLAB to show the characteristics of any solar cell depending on data sheet. Intelligent controllers was designed and used to make solar cells facing the sun all days. The proposed controller was trained by two ways; the first was trained by supervised feed forward neural network and the second by Particle Swarm Optimization (PSO) and then comparing the results obtained. The controller was trained using MATLAB and the converting it to simulink model in order to test it, and converts, it to a Very high speed integrated circuit Hardware Description Language (VHDL) language using MATLAB tool box in order to download it on Spartan 3A Field Programmable Gate Arrays (FPGAs) card. This makes the implementation of the intelligent controller more efficient and easy to use because of its reprogram - ability and the high speed performance. The controller was designed to a fully controlled DC motor driver which is used to rotate two DC motors in X - axis and Y - axis directions respectively.The experimental results show that tracking sun increases the efficiency of the system to produce energy from solar cell about 44.3778 % more energy than the solar cell without tracking system.

الغاء تداخل المسا ارت التخميني في انظمة الوصول المتعدد باستخدام تقسيم الترميز الواسع الطيف لشبكات الاتصال اللاسلكية == Multipath Interference Cancellation Investigation In Wcdma Communication Networks

اسم المؤلف: نور محمد خليل
اسم المشرف: منال جميل الكندي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Bit Error Rate (BER) and Bit Energy to Noise Ratio(?????????) performance of the 1 - D RAKE receiver without , with Space Time Transmit Diversity (STTD) and 2 - D RAKE without , with (STTD) and also without and with beamforming for WCDMA over RayleighChannel in presence of Additive White Gaussian Noise (AWGN) channel is demonstrated with purpose of making simulation of m - files developed in Matlab.Results are evaluated in terms of BER and ????????? considering the number of Base Station (BS) transmit antennas (1 - D RAKE and 2 - D RAKE receivers), and the number of RAKE fingers (1 - D RAKE receiver) and the number of Mobile Station (MS) receive antennas (2 - DRAKE receiver). The performance results of 1 - D RAKE and 2 - D RAKE receivers showed that the receivers have satisfactory BER performance and the performance of RAKE receivers is more improved by increasing the number of RAKE fingers, performance is even better when beamforming was applied.The performance results of the three receive diversity of 2 - D RAKE receiver schemes : Selection Combining (SC), Equal Gain Combining (EGC) or Maximal Ratio Combining (MRC)) of 2 - D RAKE showed that there are significant improvements in BER and ?????????performance over the 1 - D RAKE. BER of 10???? can be obtained at ????????? ? 5 dB performance with four fingers of 2 - D RAKE receiver with STTD and beamforming and MRC scheme for five receive antenna elements.

تحسين جودة الصورة التوموغرافية المعاد تركيبها باستخدام خوارزمية التسقيط العكسي المرشحة == Enhancement of Tomographic Image Quality Reconstructed By Filter Backprojection Technique

اسم المؤلف: دعاء نوفل حازم
اسم المشرف: محمد حسين الحياني
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك والاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Computed tomography refers to the imaging of slices of an object by exposing them to X - ray in different directions. Measurement of image quality is one of great importance in the field of medical applications. In applications such as CT and MRI scanning, most of the time the quality of reconstructed image is assessed qualitatively by radiologist or domain experts which are purely subjective evaluation.The FBP algorithm produces excellent quality and high performance reconstruction compared with other reconstruction algorithms. This thesis presents different projection types (fan beam geometry, and cone beam geometry) for the image reconstruction, the geometries are calculated analytically by specified 2D head phantom for fan beam and 3D head phantom for single slice spiral cone beam geometry with different ranges covering angle.In the thesis the FBP algorithm was applied with the fan beam and single slice geometries. Different types of filters (Hann, Hamming, Kaiser, Cosine, Ram - Lak, and Gaussian) are used in the algorithm and a new window filter is proposed in the algorithm. Comparisons are made between the new window and different common windows by quality measurement to get a reconstructed image with high quality and high performance suitable for the implementation of the FBP.A computer programs has been designed, written, and implemented in this work using MATLAB 7.1, for fan beam and single slice projections. Good results of quality and performance were obtained for the tomographic reconstructed image from its projection on CT scanner.

تقنيات النمذجة الذكية في تنبوء حمل الطاقة الكهربائية == Intelligent Modeling Techniques of Electric Power Load Forecasting

اسم المؤلف: يونس محي نصيف
اسم المشرف: حنان ميخائيل داود
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: As far as electrical power system is concerned, there has been a need to find out the future load in advance. Load forecasting has played an important role in the generation, transmission and distribution system planning. Load forecasting of future load demand is significant for an economic and secured operation of power systems. In general, the objective of high - precision load forecasting is difficult to achieve due to complex effects on load by a variety of factors.This thesis focuses on the study of long term load forecasting by using multiple linear regression (MLR) method and using different types of computational intelligence methods such as feed forward Neural Network with back - propagation (BP) tuning algorithm (FNN - BP), feed forward Neural Network with particle swarm optimization (PSO) tuning algorithm (FNN - PSO) and Elman Neural Network with back - propagation (BP) tuning algorithm (ENN - BP). Such forecasts will be highly useful in proper system planning and operations. The algorithms have been demonstrated using simulation programs in MATLAB environment.The usefulness of the five forecasting techniques was tested on a test system data for a Big Utility Company (Egyptian Unified Network). The obtained results showed that the ENN - PSO method takes advantage of accuracy and efficiency in prediction.The ENN - PSO method was performed using population growth data on the Iraqi National Grid for the duration from 2014 to 2030.

النظام المضبب للتحكم بمشكلة التزاحم لبروتوكول (التحكم في الارسال) في الشبكات المختلطة == A Fuzzy Based TCP Congestion Control For Hybrid Networks

اسم المؤلف: سارة رعد قاسم
اسم المشرف: زينب توفيق باقر
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Transmission Control Protocol (TCP) is designed to deliver seamless and reliable end - to - end data transfer across unreliable networks and is offered connection - oriented, byte - stream service. The Internet’s TCP is probably the most widely used protocol; it is also the most carefully tuned since performance of Internet is largely based on TCP. However, throughput in TCP degrades notably when operated in erroneous networks. In erroneous networks, TCP misinterprets random packet losses and the subsequent packet reordering due to high bit error rate as congestion and invokes congestion control by triggering to fast retransmission and fast recovery, leading to under - utilization of the network resources and affecting TCP performance critically.Many proposals have been used to improve TCP performance in wireless networks. Most of these proposals were based on changing the TCP header and add more complications to the main mechanism. Means of improving performance of TCP over erroneous links were proposed using fuzzy controller in a simple manner (without changing the header) by tracking the delay and the frequencies of the occurrences of timeouts and triple duplicate acknowledgement (3dupacks) to differentiate congestion loss from bit error loss. The first proposal was FReno (Fuzzy+NewReno) but this new algorithm failed to achieve good efficiency. The second proposal was FVegas (Fuzzy+Vegas) and it also failed to improve TCP’s resource utilization. The third proposal was FWestwood (Fuzzy+Westwood) which significantly improved TCP performance. The proposed algorithm was compared against standard TCP variants for different error rates using OMNET++4 version 4.3.1 IDE simulator. FWestwood algorithm helped TCP to distinguish between congestion and packet loss and increase the performance in erroneous wired network, heterogeneous networks, wireless networks and mobile network. Results from simulations showed that in a congested network with (1% to 10%) of random packet loss rate, FWestwood achieved significant improvements in different erroneous networks over other TCP schemes. Also it achieved friendliness fair share of the link with other TCP standards.

المسار الامثل للجراحة الروبوتية الطبية باستخدام الخوارزمية الجينية == Path Optimization For Medical Surgery Robotic Using Genetic Algorithm

اسم المؤلف: زهراء داود حسين
اسم المشرف: مهند زيدان خليفة | ايمان صالح كريم
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: الهندسة الكهروميكانيكية
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تناولت هذه الرسالة دراسة تصميم امثل لموديل مختار للانسان الالي المستخدم في مجال الجراحة البشرية (جهاز التنظير البطني الجراحي ) المستخدم في مستشفى الصدر التعليمي في محافظة ميسان والمصنع من قبل شركة (KARL STORZ) من خلال زيادة عدد درجات الحرية لتصل سبعة درج | This thesis presents a study for optimal design of a robot to be used in human surgery (Laparoscope device). It was done in Al - Sader educational hospital in Maysan Governorate. The robot was manufactured by Karl Storz company. Connecting linkages were increased to get seven degrees of freedom. It is operated by the surgeon hand (complete rotation 360o , rotation in two opposite directions perpendicular to each other ,transformation along the major axes , triple joint (pitch ,roll, and yaw). Optimization has been done to these models after making analysis to the surgical robot (forward kinematic, inverse kinematic, dynamitic analysis). The optimal design was obtained by using genetic algorithm method to choose the optimal path planning in the working area. This was with the presence of obstacles to tip of end - effector motion that exists, in mechanical arm to the new model that used in this thesis. This was done by making an integrated computer program through MATLAB (R2013a). The results of best path planning would shorten length without hitting any obstacle, assuming the surrounding environment will be variable. The position and obstacle shapes would be random. We found that the best path planning in every environment depends on maximize objective function that presented by shortest length of the path. This is important from the medical point of view. This was applied successfully in practice on an industrial robot and the resulted optimal parameters to that robot with matching of the theoretical side with practical side in robot motion. The practical side was made in laboratory of the Research Unit of Automation and Robotics in the Control and Systems Engineering Department, University of Technology. The robot used was the Lab - Volt Servo Robot System Model 5250 (RoboCIM5250). This thesis includes studying the tools used in laparoscope and focuses on recent types of graspers with parallel jaws connected to the chosen design. It was noticed that the maximum entrance force for the abdominal tracar must not exceed 5N. The force on the last point of jaws is 0.42N. It was found that this force will not cause bleeding in the tissue during procedure. And that this type of small size grasper can be bent during operation in the allowed field of workspace while maintaining good strength.

التوزيع الامثل للمتحسسات في شبكة المتحسسات اللاسلكية باستخدام خوارزمية الامثلية المستوحاة من نظرية الاسراب == Optimum Sensors Deployment In Wireless Sensor Networks Using Swarm Based Bio - Inspired Optimization Algorithms

اسم المؤلف: هيثم سعدون عفتان
اسم المشرف: نزار هادي عباس
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The increased demand for Wireless Sensor Networks (WSNs) in different areas of application has intensified studies dedicated to the deployment of sensor nodes in the recent past. The deployment of sensor nodes required that some of the key objectives should be satisfied, which are the coverage ratio of the monitoring area and the lifetime of the network.In this thesis, a mathematical model to optimize the coverage ratio and the lifetime of network is developed to ensure a better utility of the WSN. The model is formulated based on several parameters such as the size of the monitoring area, network models, the total number of sensor nodes, visibility requirements, sensing/communication radius, etc.Popular swarm based bio inspired algorithms have been used to optimize the WSN deployment. The coverage optimization process has been carried out by single objective optimization algorithms such as the Ant Colony Optimization (ACO) algorithm, modified version of Particle Swarm Optimization called Discrete PSO (DPSO), Discrete Artificial Bee Colony (DABC) algorithm and a new proposed algorithm called Quantum Artificial Bee Colony (QABC). QABC is based on quantum physical concepts to improve the local search capability of standard ABC algorithm. Thereafter, a multi objective optimization algorithm has been utilized to optimize the coverage ratio and lifetime of WSN. The multi objective optimization has been carried out by Non - dominated Sorting Genetic Algorithm (NSGA - II). All of these algorithms are simple, effective and computationally efficient optimization techniques.The WSN deployment has been simulated using MATLAB 7.12.0 (R2011a) package, NetBeans 7.4 Java integrated development environments, JMETAL 4.5 and Java Universal Network/Graph (JUNG 2.0.1) frameworks. The computer simulation results showed that the proposed algorithm for coverage ratio maximization was up to two times faster than the others. Furthermore, the conducted simulation indicated that the QABC algorithm offered (6%) better solution in terms of coverage in comparison with the others in some cases. Also the results showed that the deterministic deployment can achieve up to (25%) better coverage ratio than the random deployment. In addition, QABC outperformed GA, PSO and ABC algorithms when applied to several test problems. Additionally, the results showed that the NSGA - II algorithm could effectively optimize the network lifetime and coverage ratio and produced good convergent solutions to the Pareto front and was uniformly distributed along it.

نظام كشف وتمييز لوحة الرخصة للسيارات العراقية == License Plate Detection And Recognition System For Iraqi Cars

اسم المؤلف: ثائر عذار هاشم
اسم المشرف: اياد ابراهيم عباس
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: نظام كشف وتمييز لوحات ارقام السيارات هو تقنية في معالجة الصور يستخدم للتعرف على السيارات من خلال لوحات الارقم الخاصة بها, او بكلمات اخرى هي تقنية تستخدم لتحويل نص صورة لوحة ارقام السيارات الرقمية الى ملف نص ممكن ان يحرر ويستخدم في اي برنامج او تطبيق اخر | Automatic License Plate Detection and Recognition (ALPDR) system is an image processing technology used to identify vehicles by their license plates, or in other words, is a technology used to convert the text on digital images of vehicle license plates to a text file that can be edited and used as such by any other program or application that needs it.License Plate Detection and Recognition system for Iraqi cars have a wide range of applications; it is used to extract plate number to create automated solutions for various problems. Among these applications : parking, border crossing, traffic control, access control and stolen cars tracking.This system consists of two main parts : the first is a practical implementation of how to take a picture automatically for cars passes, this was done by two sensors type (GP2Y0A21YK0F sensor) connected with each other and interfaced with a camera (A4tech USB camera), this camera is interfaced using Matlab with the PC. The camera is attached using USB port. The second part is image processing, this part includes four basic stages : The first stage is image preprocessing which involves image normalization and RGB to gray image conversion. Second stage is detection of a possible license plate using edge detection technique and extracts these LP using region growing technique, detection rates reach to 95%. Third stage is alphanumeric character segmentation to isolate each character, numbers and words of the license plate using Otsu's and Hough transforms technique for subsequent recognition. The last stage reads the alphanumeric character and words by correlation template matching, which is a simple, fast and given a recognition rate reach to 98.245%.

محاكاة تضمين تقسيم التردد المتعامد المتعدد المستخدمين المشفر في الخط النازل == Simulation of Coded Multiuser Ofdm Downlink

اسم المؤلف: دﻧﻴﺎ ﻓﺆاد فاروق النعيمي
اسم المشرف: رعد سامي فياض
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2008
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The orthogonal frequency division multiple access (OFDMA) scheme adopts orthogonal frequency division multiplexing (OFDM) subcarriers, which are particularly suited for transmition over broadband frequency selection channels, to support multiusers. The scheme considered usually assigns a subset of subcarriers to each user and adopted adaptive techniques for the allocation of available resources/subcarriers according to the channel state information (CSI) estimated at the transmitter using a reverse link. This thesis proposed three coded multiuser OFDM schemes based on spreading the data of each user over all subcarriers without CSI at the transmitter. The idea behind these schemes is to split the OFDM transceiver into two stages : one common to all users while the other consists of identical parallel units with each unit is used to process the data related to an individual user. The two stages are separated by a multiplexer/demultiplexer unit whose position can be chosen to yield different schemes. The three schemes considered here are : user multiplexed scheme, inner coded multiplexing scheme, and mapper multiplexing scheme. The proposed schemes implemented are using MATLAB simulink (version 7) to investigate their performance under different operating conditions related to number of users, Rayleigh fading channel, and serial concatenated codes. The results are compared with those related to two conventional schemes, subcarrier mapping scheme and outer coded multiplexing scheme. The simulation results indicate that the proposed user multiplexing scheme may offer performance as high as that offered by the conventional outer coded multiplexing scheme but with reduced number of equipments.

تهيئة حاسوبية لموجه سيسكو == Computer Based Configuration For Cisco Routers

اسم المؤلف: فارتان رافي كريكوريان
اسم المشرف: غسان حميد عبد المجيد
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2008
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية الهندسة - قسم الهندسة الالكترونية والاتصالات
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Routers are intelligent devices that make connection between different networks possible. In addition, routers can perform several functions, including filtration and selection of the best path of packets movement. Routers must be configured efficiently in order to perform the above functions. In literature, two approaches have been distinguished for the configuration, namely; text mode and graphical mode approach. The present work is analyzing these two approaches and defines precisely their advantages and limitations. As a result of this analysis, a new approach is proposed in this thesis which eliminates the limitations. The work proposes a graphical interface which is executed on a desktop (or laptop) PC. The user defines the configuration parameters through a program which transfers these parameters to the router by console port instead of Ethernet port. These parameters are then saved on Non Volatile Random Access Memory. The proposed graphical interface is implemented by standard lab consisted of two routers. The implementation shows that the time of configuration can be reduced to 70% of the text mode approach, and overcome the trouble of the old graphical interface.

تعزيز اداء اتصالات الراديو عبر الليف احادي ومتعدد الطول الموجي بواسطة تقنية التضمين == Performance Enhancements of Single And Multi - Wavelength Radio Links Over Fiber By Modulation Technique

اسم المؤلف: مصطفى عبد الهادي جليل
اسم المشرف: عايد خلف محمد
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الاتصالات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • Radio - over - Fiber (RoF)
  • Quadrature Phase Shift Keying (QPSK)
  • Quadrature Amplitude Modulation (QAM)
  • Orthogonal Frequency Division Multiplexing (OFDM)
  • Digital Signal Processing (DSP) Unit
الصفحات الاولى:
المستخلص: تم تطوير تكنولوجيا الراديو عبر الالياف منذ اواخر القرن العشرين، وتم استخدامها في مجموعة من التطبيقات لانظمة الاتصالات ويعتبر الراديو عبر الالياف هو الجيل المقبل من انظمة الاتصالات لما يمتاز به من العديد من المزايا مقارنة مع النظام التقليدي مع توهين منخفض | Radio - over - Fiber (RoF) technology has been developed since the late 20th century and has been used efficiently in a range of applications for communication systems. Radio over fiber system is the next generation of communication systems because it has many advantages compared with conventional system with low attenuation, enormous bandwidth of optical fiber, and extension of existing coverage and capacity. RoF system refers to the radio signals which are modulated with optical signal and transmitted over optical fiber link from Central Office (CO) to the Remote Nodes (RNs).In this work, several RoF systems have been designed and simulated with different modulation techniques using commercial software package called “Optisystem v.12”. Furthermore, these systems were compared with each other to check for better performance. These systems are presented as follows : The first system is RoF with Quadrature Phase Shift Keying (QPSK), 16 - Quadrature Amplitude Modulation (16 - QAM), and 64 - QAM schemes with and without OFDM technique. The simulation results of this system show that the Signal to Noise Ratio (SNR) for 64 - QAM - OFDM higher than SNR for QPSK, 4 - QAM and 16 - QAM with OFDM at 10 - 9 symbol error, after 50 km of SMF length without any amplification or compensation techniques. In addition, also SNR for 64 - QAM - OFDM higher than SNR for other techniques in this work after 160 km of fiber length.The second system is the RoF with QPSK and 16 - QAM schemes with Digital Signal Processing (DSP) unit in the receiver side. The simulation results of this system show that the Error Vector Magnitude (EVM) for QPSK scheme with DSP unit is 14.5% and 85.5% without DSP unit after 50 km of fiber length. Furthermore, the EVM for 16 - QAM with DSP unit is 7.5%, but the EVM for the same system without DSP unit is 91%. In addition, the EVM for QPSK with DSP equal to 11.5%, but the EVM for 16 - QAM with DSP equal to 9% after 160 km of fiber length.The third system is RoF system with two multiplexing techniques, 8×10 Gbps WDM - RoF system and 4×5 Gbps SCM - RoF system, have been simulated with 4 - QAM - OFDM, 16 - QAM - OFDM and 64 - QAM - OFDM schemes. The fourth system was to combine the techniques of wavelength division multiplexing (WDM) and subcarrier multiplexing (SCM) to increase the capacity of the system by 20×8 Gbps data rate. The simulation results show that the SCM - WDM - RoF with 64 - QAM gives high SNR compared with SCM - WDM - RoF system with other modulation schemes which have been used in this work.

تحسين الاستقرارية باستخدام التوليد الموزع في شبكة النجف الاشرف الكهربائية == Stability Enhancement Using Distributed Generation In Al - Najaf Al - Ashraf Electrical Network

اسم المؤلف: زيد طارق حسن
اسم المشرف: رشيد حميد الربيعي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان عمل وتركيب نظام التوزيع يتغير مع اضافة وحدات التوليد الموزع (DG )، حيث انها تؤثر على خسائر القدرة، الاستقرارية، الفولطية، جودة الطاقة وكميات اخرى، لذلك اختيار الموقع الامثل والحجم وعدد وحدات التوليد الموزع (DG ) ضروري لتجنب التاثيرات السلبية على نظا | The operation and structure of distribution system are changing with the integration of distributed generation (DG), where the DG may have effect on power losses, stability, voltage profile, power quality and other quantities, therefore the optimization of location , size and number of DG are necessary to avoid the negative impacts on electric power system.In this work, the Particle Swarm Optimization (PSO) technique is used to find the optimal number and locations of DG in order to minimize the active power losses. The thermal limit of transmission lines and transformers was studied in cases , with DG and without DG, to detect the lines or transformers which exceed the limit in order to processed it. The voltage stability of distribution network has been investigated, using L index (which aims to detect the vulnerable load buses of an electrical power system). Also the rotor angle transient stability of DG units has been calculated to specify the critical clearing time (CCT) of each circuit breaker in distribution network when one of transmission lines is exposed to three phase to ground fault. The developed algorithm has been verified using two test systems IEEE 33 - bus distribution system and the WSCC 9 - bus test system, furthermore applied to a part of Iraqi distribution network (Al - Najaf Al - Ashraf distribution network). Two softwares are used in this work , the first is Matlab R2013a for implementation of the PSO and voltage stability algorithms while the second software is Power World Simulator 15 for implementation of the thermal limit of transmission lines and transformers, and rotor angle transient stability of DG units.DG contributed significantly to reduce the power losses in Al - Najaf Al - Ashraf distribution network, where there is a reduction by about 96% in active losses. Also DG processed the overload of large substations and the stability of buses in the network.

تصميم وتصنيع والتحقق من الخلية الشمسية ذات الصبغة الحساسة للضوء == Design, Fabrication And Verification of Dye Sensitized Solar Cell DSSC

اسم المؤلف: صابرين سمير حسان
اسم المشرف: ثائرة زكريا الطيار
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • Dye sensitized solar cells
  • natural dyes
  • synthetic dye
الصفحات الاولى:
المستخلص: Solar cells are considered a promising technology and renewable, in view of increasing in the electro - optical energy. The continual enhancement in solar cell efficiency by searching for new concepts and techniques, which should grow since it is considered as one of the important sources of energy of the future.This work introduces a type of solar cells that employs photosensitive organic dye. These cells use thin membrane of Titanium dioxide material as nanoparticles covered by an organic dye, which absorbs solar energy (like the chlorophyll in green leaves) to be converted into electrons that are injected into the Titanium dioxide layer, which serves as electron collector. In addition, it has an electrolyte solution to compensate for the electrons lost by the organic dye molecules.The cell's positive terminal was prepared from the deposition of a thin membrane of Titanium dioxide, of 22 micrometer thickness on a conductive glass electrode , followed by heat treatment at 450? for 30 minutes. Three organic dyes were used, two of (Cherry juice mixed with Hibiscus and the Berries juice) which were natural dyes, and the other synthetic, the "Eosin" as an industrial dye. Small quantities of Iodine and Potassium Iodide were dissolved in Ethyl Alcohol of 99.9% concentration in order to prepare the electrolyte solution. As to the negative terminal, it was prepared from the deposition of a graphite layer, used in pencils, onto a conducting glass electrode. The final stage involved the assembly of the different prepared cell components and tested.The equipment used in this work included spectrum analyzer for provision of absorption spectra for the three dyes.The cells have been tested by exposure to light of 100W/cm2 to obtain I - V characteristic curve and the greatest current is obtained with the Cherries and Hibiscus cell was 6.205 mA/cm2 and the maximum voltage 0.569 V. As to the Berries dye cell, the maximum current is found 4.35 mA / cm2 and its maximum voltage 0.607 V. The maximum current and voltage for the Eosin dye cell are found to be 1.32 mA/ cm2 and 0.651V.The conversion efficiency for the Cherry and Hibiscus dye cell is found to be 1.9%, the Berries dye cell 1.5% and for the Eosin dye 0.5%.

اكتشاف تزوير المتحكم بالوصول للوسط في شبكة الواي فاي المحلية == Detection of MAC Spoofing In A WiFi LAN

اسم المؤلف: امنة محمد عباس
اسم المشرف: حامد محمد علي الشيباني | قيس سعيد الصباغ
الموضوع العام: هندسة السيطرة والنظم
السنة: 2013
الموضوع الدقيق: هندسة السيطرة والنظم
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الهجمات عن طريق تزوير المتحكم بالوصول الى الوسط (MAC) تشمل تغيير المهاجم العنوان المصنعي للMAC الى اي قيمة اخرى. هجمات التزوير للMAC في شبكات الواي فاي بسيطة بسبب سهولة الوصول الى الادوات التي تزور الMAC على الانترنت مثل MAC Makeup وبالاضافة الى ذلك نستطي | Medium Access Control (MAC) spoofing attacks relate to an attacker altering the manufacturer assigned MAC address to any other value. MAC spoofing attacks in WiFi network are simple because of the ease of access to the tools of the MAC fraud on the Internet like MAC Makeup, and in addition to that the MAC address can be changed manually without software. MAC spoofing attacks are considered one of the most intensive attacks in the WiFi network; as result for that, many MAC spoofing detection systems were built, each of which comes with its strength and weak points. This thesis logically identifies and recognizes the weak points and masquerading paths that penetrate the up - to - date existing detection systems. Then the most effective features of the existing detection systems are extracted, modified and combined together to develop more powerful detection system.Sequence Number with Rate and Signal Strength detection method (SN - R - SS) consists from three phases. First phase is Window Sequence Numbers; to detect suspicious spoofed frames in the network. Second phase is Transmission Rate Analysis; to reduce the amount of the suspicious spoofed frames that are generated from the first phase. Finally, the third phase is Received Signal Strength; this phase is decisive phase because it decides whether the suspicious spoofed frames are spoofed or not. Commview for WiFi network monitor and analyzer is used to capturing frames from the radio channals. Matlab language is used to implement various computational and mathematical relations in SN - R - SS. This detection method does not work in a real time because this method needs a lot of computation.

تقليل تموج عزم الدوران في طريقة السيطرة المباشرة لعزم الدوران للمحركات الحثية == Torque Ripple Reduction Based Direct Torque Control For Induction Motor Drives

اسم المؤلف: حيدر سالم حميد
اسم المشرف: Prof. Dr. J.H. Alwash | Hanan M. Habbi
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: التحكم المباشر لعزم الدوران هو اسلوب التحكم المستخدم في انظمة محرك التيار المتناوب للحصول على سيطرة عزم دوران عالية الاداء. محرك DTC التقليدية يحتوي على زوج من الـ ( hysteresis comparators)، حساب الفيض وعزم الدوران وجدول اختيارالـ ( voltage vector). يت | Direct Torque Control (DTC) is a control technique used in AC drive systems to obtain high performance torque control. The conventional DTC drive contains a pair of hysteresis comparators, a flux and torque estimator and a voltage vector selection table. The torque and flux are controlled simultaneously by applying suitable voltage vectors, and by limiting these quantities within their hysteresis bands, de - coupled control of torque and flux can be achieved. Conventional DTC drives utilizing hysteresis comparators suffer from high torque ripple and variable switching frequency. Several techniques have been developed to improve the torque performance. In this thesis, Proportional - Integral (PI) controller has been presented to improve the system performance which gives better torque and flux response and also reduces the undesirable torque ripple. The most common solution to high torque ripple and variable switching frequency is to use the space vector pulse width modulation (SV - PWM) that depends on the reference torque and flux. The reference voltage vector is then realized by using a voltage vector modulator.The conventional DTC and DTC with PI controller are implemented using Xilinx System Generator (XSG) for MATLAB/Simulink environment through Xilinx blocksets. The design was achieved in VHDL, based on a MATLAB/Simulink simulation model. The Hardware - in - the - Loop (HIL) method is used to verify the functionality of the Xilinx FPGA estimator. The results are obtained and compared with MATLAB/ Simulink results considering the implementation of the proposed model on the Xilinx NEXYS2 Spartan 3E1200 FG320 Kit. The simulations of the DTC - SVPWM were carried out using MATLAB/ Simulink simulation package. The design, implementation and simulation of the overall drive system is performed using MATLAB/Simulink program version 7.13.0.564 (R2011ba) and Xilinx ISE Design Suite 14.2.

تمييز قزحية العين باستخدام التحويل الموجي والشبكات الاصطناعية

اسم المؤلف: احمد عز الدين عبد الله
اسم المشرف: هديل نصرت عبد الله
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الالكترونيك
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: التعرف على قزحية العين هي تقنية القياس الحيوي التي تتناول تحديد الهوية على اساس قزحية الانسان. يعتبر تميز القزحية من انواع التكنولوجيا الحيوية الاكثر دقة المتاحة اليوم بالمقارنة مع انواع كثيرة من التقنيات البيومترية المستخدمة مثل : مسح بصمات الاصابع، التعر | Iris Recognition is a Biometric Technology which deals with identification based on the human iris. It is considered to be the most accurate biometric technology available today compared with many kinds of biometric technologies used, like Fingerprint scanning, Face recognition, Voice recognition and Hand geometry scanning because it has some advantages, such as uniqueness, stability and high recognition rate etc., makes iris recognition so accurate.In this proposed system, two database systems are used. The first is CASIA database system (version 1.0)(Chinese Academy of Sciences Institute of Automation). And, the second is Real database system by using real persons (each with many images) for recognition through camera Mobile Type of Galaxy Note3. An approach to get more accuracy of the offline iris recognition is composed of many steps : capturing the iris image, determining the location of the iris boundaries, normalization, preprocessed using median filter to remove noise, using wavelet transform for two types of filter, Haar and Daubechies, in order to extract the features and finally using the matching by artificial feed forward neural network with back propagation algorithm (FFBNN) for training and testing iris image.In CASIA system, the iris recognition rate for Haar filter was 84.2% and for Daubechies filter was 92.8%, while in the real system, iris recognition rate for Haar filter was 90% and for Daubechies filter was 98.7%. This means the Daubechies filter is the best in execution time and mean square error from the Haar filter. Finally, efficiency of this system is logical, because the performance measurement of False Acceptance Rates was reasonable. The results and the experiments were implemented by P4 computer and the software package MATLAB (R2011a).

تطبيق الشبكة العصبية في تكوين الشعاع المتكيف لنظام الهوائي الذكي == Neural Network Application In Adaptive Beamforming For Smart Antenna System

اسم المؤلف: سليمان احمد غازي
اسم المشرف: عضيد حسن سلومي
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2015
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: الجامعة المستنصرية - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: انظمة الهوائيات الذكية تعمل على تحسين الاداء وزيادة في السعة لانظمة الاتصالات المتنقلة. ويمكن لانظمة الهوائيات الذكية حل مشكلة نظام الاتصالات المتنقلة مثل التدخل في نفس القناة، والتاخير الحاصل نتيجة الانتشار والمسارات المتعددة التي تاخذها الاشارة عن طريق | The smart antenna systems are promise to provide performance improvement and capacity increasing for the base station of mobile communication systems. Smart antenna systems can solve the problem of mobile communication system such as co - channel interference , delay spread and multipath by an advance signal processing technology called beamforming. In this work artificial neural networks (Feed Forward Neural Network (FFNN) and feedback Elman Recurrent Neural Network (ERNN) ) are used for smart antenna adaptive beamforming for one and multiple targets.Neural network is used to calculate the optimum weights of antenna array to adapt the radiation pattern of the antenna array by directing multiple narrow beams toward the desired users and nulling interference or unwanted users. FFNN and ERNN are trained by supervised backpropagation learning algorithms, FFNN was trained by using Levenberg - Marquardt (lm),Resilient Back - Propagation (Rprop), Gradient descent with momentum and adaptive learning rate (gdx), Gradient descent and adaptive learning rate (gda) and biasing regulation(br), while lm and Rprop are used to train ERNN..The simulation results show that the best performance of smart antenna adaptive beamforming for one and multiple targets is obtained when the NN (FFNN and ERNN) trained by lm algorithm as compared with other algorithms, since it consider the fastest supervised training algorithm but with more memory requirement. Where the performance of FFNN training phase based (lm) algorithm for single target for five element uniform linear array antenna is [2.746641e - 14] at epoch 27 with best validation performance and best test performance approximately equal to the best training performance. While The performance of ERNN training phase based lm algorithm for single target is [1.121938e - 14] at epoch 38 with best validation performance equal to [1.682442e - 14] and the best test performance is [3.363946e - 14].The neural network model in adaptive beamforming are compared with smart antenna adaptive beamforming based on Least Mean Square (LMS) algorithm, and gave better performance than LMS.

تقييم اداء نظام تحويل المويجات المنفصلة - مازج تقسيمات التردد المتعامد المشفر للتطبيقات ذات السرعة العالية == Performance Evaluation of DWT - COFDM System For High Speed Applications

اسم المؤلف: ضفاف طلال شاكر
اسم المشرف: سعد سفاح حسون
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بابل - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بابل
الصفحات الاولى:
المستخلص: The internet revolution has created the need for wireless technologies that can deliver data at high speeds in a spectrally efficient manner. However, supporting such high data rates with sufficient robustness to radio channel impairments requires careful selection of modulation techniques. The demand for high - speed mobile wireless communications is rapidly growing. OFDM technology promises to be a key technique for achieving the high data capacity and spectral efficiency requirements for wireless communication systems. Abstract In this thesis, Inverse Discrete Wavelet Transform (IDWT) is used as a modulation technique instead of Inverse Fast Fourier Transform (IFFT) with coded OFDM due to its excellent orthogonality and superior spectral containment properties of wavelet filters. Coded Orthogonal Frequency Division Multiplexing (COFDM) is the same as OFDM except that forward error correction is applied to the signal before transmission. This is to minimize errors in the transmission due to lost carriers from frequency selective fading, channel noise and other propagation effects. Convolutional code is used in this thesis as a forward error correction code. The proposed (DWT - COFDM) system is simulated under the effect of additive white Gaussian noise channel, and multi - path fading channel at different values of Doppler frequencies (22.2Hz, 41.7Hz and 444.4Hz) which are the most significant impact channel parameters on the bit error rate performance. The proposed system is also compared with DWT - OFDM, FFTCOFDM and FFT - OFDM systems. It is found that the proposed system can significantly improve the BER performance and it performs better than the other three systems. On the other hand, convolutional code and DWT is used to reduce the peak to average power ratio (PAPR) which is considered the serious problem in any wireless communication system using multi carrier modulation techniques like OFDM systems by using two of the most important non distortion techniques which are selective level mapping (SLM) and partial transmit sequence (PTS) and the results show that the proposed systems for SLM and PTS techniques can perform better than the conventional SLM and PTS. The results also show that the proposed PTS technique performs better than the proposed SLM technique.

اكتشاف العطل الارضي المنفرد واخماده ذاتيا باستخدام السيطرة على ملف بترسون في شبكة التوزيع == Detection of Earth Fault And Self - Extinguishing By Controlling Petersen - Coil In Distribution Grid

اسم المؤلف: فريال ابراهيم الظفيري
اسم المشرف: عبد الغني عبد الرزاق عبد الطائي | قاسم كرم عبد الله
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2015
الموضوع الدقيق: هندسة الكهرباء - قدرة ومكائن
الدرجة: ماجستير
الجامعة: جامعة بابل - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بابل
الصفحات الاولى:
المستخلص: ان اكثر الاعطال شيوعا والتي تتعرض لها الشبكة الكهربائية في العالم هو Single Line to Earth حيث ان عطل احدى الاطوار مع الارضي في الشبكات الكهربائية, يسبب هذا قوسا كهربائيا اضافه الى جهد كبير , اكبر من جهد الطورين مع بعضهما مما يزيد خطورة الفصل والعزل في ال | All over the world, the most common faults in the distribution network is the single line to ground fault. A single phase fault with the earthing in the distribution networks causes electrical arc as well as high voltage than the two phases together which increase the danger of separation and isolation in networks. Consequently, this case can be controlled through Peterson Coil which turns off or reduces the electrical arc that makes the network safer. This work has using technique to detect the earth fault in the single - phase by distinguishing between the higher and the lower values of the currents. Also, this technique is used to detect the capacity of earthing network lines and the possibility to adapt the capacitor for inductance in order to detect the electrical arc during faults and to detect the earth leakage.Moreover, we have used many methods to control Peterson coils such as using PID Controller , Fuzzy Logic Controller, Hybrid control PID and Fuzzy System and Adaptive Neural Fuzzy Inference system, to determine the earth fault current at values equal to the current in the two sound phases. To getting best results for the fault current through conducting lab experiences by using DC Servo motor and Arduino. And the fault current is converted from the rated current, thus thousands of tons of copper cost are save. They were used to carry this high voltage. Finally, the first practical part (Simulink) was implemented through Mat lab (R2011a) and (R2013a) , On the other hand, the second practical part was in the lab, where servo motors Where used, variable and non - variable inductance , the drive to isolate the control loop from the power, PID and PWM, have also used the Arduino system to program the overdrive.

حل سريان الاحمال وتحليل الاضطرابات في منظومات القدرة على اسس المنطق المضبب باستخدام دالة الكاوسين == Fuzzy Load Flow And Contingency Analysis Based On Gaussian Distribution System

اسم المؤلف: یاسر فلاح حسن
اسم المشرف: حسن عبد الله كبة
الموضوع العام: هندسة الكهرباء والالكترون والاتصالات
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This thesis presented durable minimization method for solving the load flow problem and contingency analysis in on - line applications. Because the electrical power networks are complicated systems, traditional (numerical) minimization methods may encounter difficulties in solving the load flow problem and contingency analysis due to properties of the problem.Thus, the fuzzy logic applications represented by the fuzzy load flow (FLF) and fuzzy contingency analysis (FCA) methods share the best selection in - stead of the traditional methods because the artificial intelligence (AI) methods do not use the characteristics of the problem to determine the next sampling point. The obtained results are very accurate with outstanding computation time, which made the FLF suitable for real time application. In addition to these features, the FLF also able to solve load flow problem of ill - conditioned power system and contingency analysis efficiently.The FLF method using Gaussian membership function requires less number of iterations and less computing time than that required in the FLF method using triangular membership function.All the obtained results show that the computation time of the Fuzzy Load Flow (FLF) is less than the Fast Decoupled Load Flow (FDLF). Using sparsity technique for the input sparse matrix data without complicating the algorithm?s programs gives reduction in overall computation time and storage requirements. The contingency ranking process by calculating the active power and voltage performance indices (PIP and PIV) are required for real power problems and voltage problems respectively for two typical test systems being the IEEE 14 - bus and 30 - bus systems. The performance of the FLF and FCA was tested on two typical test systems being the IEEE 14 - bus and 30 - bus systems in addition to the 362 - bus Iraqi National Grid.

دراسة بعض الصفات الشكلية والفسلجية والتناسلية للغزال الدرقي العراقي (Gazella subgutturosa) == Study of Some Morphological, Physiological And Reproductive Parameters of Iraqi Goitered Gazelle (Gazella Subgutturosa)

اسم المؤلف: حسام جاسم حسين بنانه
اسم المشرف: محمد علي اسحق | محمد باقر محمد رشاد فخر الدين
الموضوع العام: علوم الزراعة
السنة: 2014
الموضوع الدقيق: الحيوان - الفسلجة
الدرجة: دكتوراه
الجامعة: جامعة بغداد - كلية الزراعة - قسم الثروة الحيوانية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: هدفت الدراسة الحالية الى تحديد بعض الخصائص الشكلية والفسلجية للغزال الدرقي العراقي (Gazella subgutturosa). اجريت هذه الدراسة في مواقع مختلفة من العراق، ولكن الموقع الرئيسي للتجربة كان في كلية الزراعة - جامعة بغداد. تم دراسة التكيف والخصائص الشكلية ومعايير | The aim of the present study was to determine some morphological and physiological characteristics of Iraqi Goitered gazelle (Gazella subgutturosa). This study was conducted at several locations in Iraq, but the main location of the experiment was in the

خصائص ونظام مكامن تكويني الفتحة (الفارس السفلي) والغار في حقول مختارة من الجنوب والفرات الاوسط في العراق == Determination of Oil Characterization And Petroleum System of Fatha (Lower Fars) And Ghar Formations In Selected Oil Fields In South And Mid Euphrates of Iraq

اسم المؤلف: عبد الحسين نعمة شناوة العتابي
اسم المشرف: ثامر خزعل العامري | عبد الله عبد الحسين الياسري
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: النفط والمكامن
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: عد تكون الفتحه(الفارس الاسفل) والغار من المكامن النفطيه واسعة الانتشار لاسيما تكون الفارس السفل بالرغم من احتوائهما على النفوط الثقيله وقد تميز نفط الفارس السفل بتنوع كثافاته حيث تقل كثافته باتجاه حقل نهر عمر ومجنون بينما تزداد كثافته باتجاه ح | Fatha(Lower Fars) and Ghar Formations are wide spread in south and mid Euphrates district of Iraq especially Fatha Formation. Crude oil have variable API densities between 13? - 20 ? API it became lighter to - ward Naher Umer and Majnoon oil Fields and h

الجغرافيا وعلم الحوض من السانتونيان اللبياني الراحل نجاح سرداش، شقلوع ومناطق كركوك، شمال العراق == Boistratigraphy And Paleoecology of Late Albian - Late Santonian Succession of Surdash, Shaqlawa And Kirkuk Areas, North Iraq

اسم المؤلف: صلاح علي حسين
اسم المشرف: Saad AL | Sheikhly
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: الطبقات والمتحجرات
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Three formations (Dokan, Gulneri and Kometan) are studied in seven outcrop sections; these sections are Surdash, Qallat, Khalakan, Hezob, Sektan, Degala and Shaqlawa and three supplementary subsurface sections form Kirkuk - 260, Kirkuk - 246 and Bai Hass

دراسة هيدروجيولوجية وهيدروكيميائية لمنطقة الرحالية - الاخيضر == Hydrogeological And Hydrochemical Study of Al - Rahaliya - Al - Ekhedhur Area

اسم المؤلف: شهد عادل فاضل القره غولي
اسم المشرف: معتز عبد الستار الدباس
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: علم الارض
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تقع منطقة الدراسة ضمن محافظتي الانبار وكربلاء بين خطي طول شرقا (43° 15' الى 43° 40' ) ودائرتي عرض شمالا (32° 25' الى 32° 50' ) وتمثل الساحل الغربي لبحيرة الرزازة. التكوينات الجيولوجية المهمة في منطقة الدراسة تتكون من ترسبات العصر الثلاثي (الدمام, الفرات ا | The study area is located within Al - Anbar and Karbala governorates between longitude (43° 15' to 43° 40') and latitude (32° 25' to 32° 50'); it represent the area to the western shore of Al - Razzaza lake. The important geological formations in the stud

سلوك النظائر الطبيعية في الموارد المائية بمنطقة الشنافية - السماوة == Behavior of Natural Occurring Isotopes In Water Resources In Shanafiya - Samawa Area

اسم المؤلف: علي رؤوف عجينة
اسم المشرف: Kamal K. Ali
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: علم الارض
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: جرت في ھذا البحث دراسة نظائرية وجيوكيميائية للموارد المائية في منطقة الشنافية - السماوة. تغطي منطقة الدراسة وما حولھا صخور ذات اعمار تتراوح بين الايوسين المبكر الى العصر الحديث متمثلة بتكاوين الرص وتكوين الدمام وتكوين الفرات وتكوين النفايل وترسبات العصر ا | Isotopic study supported by hydrochemistry study of the water resources in Shanafiya - Samawa area (longitudes 44° 33? 57? _ 45° 15? 27? and latitudes 31° 06? _ 31° 36? 14?) was achieved in this research. The area and the surroundings are covered by sedim

تقييم جيولوجي مكمني لتكوين المشرف في حقل طوبة النفطي جنوب العراق == Geological Reservoir Evaluation of Mishrif Formation In Tuba Oil Field Southern Iraq

اسم المؤلف: محمد هليل صكر
اسم المشرف: ضياء يوسف عبد الراوي | عبد الله عبد الحسن علي الياسري
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: النفط والمكامن
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يعد تكوين المشرف ) الكتريتاسي الاعلى ( احد المكامن المهمة في الحقول النفطية جنوب العراق ولاسيما في حقل طوبة النفطي يقع حقل طوبة بمسافة 35 كم جنوب غرب مدينة البصرة ويحد الحقل من جهة الشرق حقلالزبير بمسافة 1 كم ومن جهة الغرب حقل الرميلة بمسافة 9 كم ويفصل ب | The Mishrif Formation (Upper Cretaceous) is one of the most important formation in oil fields, which is located in southern part of Iraq, and is of Upper Cretaceous age. Tuba field is located nearly 40 km SW - Basrah city. It is limited from east by Zubai

بتروغرافية وجيوكيميائية تكوين المقدادية في مناطق زاويتة وعمادية شمال العراق == Petrography And Geochemistry of Mukdadiya Formation In Zawita And Amadia Areas Northern Iraq

اسم المؤلف: رانية مؤيد صبري الخالدي
اسم المشرف: ثامر عباس الشمري
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: الجيوكيمياء
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Mukdadiya Formation (L.Pliocene) is studied in Duhok district northern Iraq from petrographic, mineralogical, geochemical and sedimentary provenance sides. Field work was carried out and 78 rock samples were collected along two sedimentary sections in Zaw

دراسة جيوفيزيائية وجيوتكنيكية لموقع سد شيوه سور شمال شرقي كركوك \ شمال العراق == Geophysical And Geotechnical Study In Shewasoor Dam Site Northeastern Kirkuk / Northern Iraq

اسم المؤلف: ظاهر خليل علي
اسم المشرف: احمد شهاب البناء | سلمان زين العابدين خورشيد
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: الجيوفيزياء
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Shallow geoelectirc sounding with seismic refraction and deep gravity explorations in addition to geotechnical study has been carried out in Shewasoor small dam site in northeast of Kirkuk city/ northern Iraq which has coordinates of (35? 47' 20") N and (

دراسة هيدروجيولوجية وهيدروكيميائية منطقة الشهابي / الكوت في جنوب العراق == Hydrogeological And Hydrochemistry Study of Al - Shihabi Area / Al - Kut, South of Iraq

اسم المؤلف: عدي محمد عبد الشهيد الموسوي
اسم المشرف: ايسر محمد الشماع
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: علم الارض
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Al - Shihabi Area lies at the east of Al - Kut city, south east of Iraq. The studied area is bounded from east to northeast by Iraqi - Iranian bounders, which extends from northeast to southeast. The area covers about (880 km2). The elevation for the ar

دراسة تركيبية لحقل بلد ومدلولاتها المكمنية == Structural Study

اسم المؤلف: احمد ابراهيم صالح حسن النعيمي
اسم المشرف: محمد راشد عبود | مهنا متعب احمد
الموضوع العام: علوم الارض
السنة: 2012
الموضوع الدقيق: علم الارض
الدرجة: ماجستير
الجامعة: جامعة تكريت - كلية العلوم - قسم علم الارض
اللغة: الانكليزية
مكان الجامعة: صلاح الدين
الصفحات الاولى:
المستخلص: The current study deals with the structural geology of Balad Field and its relationship with the reservoir characteristics. It can be regarded as the first academic study in Iraq dealing with the structural subsurface geology and its relationship with hyd

دراسة هيدروجيولوجية وبيئية لمنطقة خانقين شمال شرق العراق == Hydrogeological And Environmental Study of Khanaqin Area, Northeast of Iraq

اسم المؤلف: علياء شاكر عليوي
اسم المشرف: سوسن مجيد علي
الموضوع العام: علم الارض
السنة: 2015
الموضوع الدقيق: علم الارض
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تقع منطقة الدراسة في الجزء الشمالي الشرقي من العراق بين جنوب السليمانية والجزء الشمالي. نهر الوند هو احد فروع نهر ديالى ينبع من 2 كم 600 الشرقي من محافظة ديالى, وبمساحة قدرها الاراضي الايرانية ويمر خلال منطقة الدراسة لحين التقائه بنهر ديالى عند قضاء جلول | The study area lies in the northeastern part of Iraq between south of Sulimaniya and north east of Diyala provinces, where the total area is about 600 km2 approximately. Al - Wand River, tributary of Diyala River, originates from Iranian lands and passes

موديل جيولوجي متكامل ثلاثي الابعاد لتكوين المشرف في حقل الحلفاية == 3D Integrated Geological Modeling of Mishrif Formation In Halfaya Oil Field

اسم المؤلف: علي دعير جعفر الموسوي
اسم المشرف: مدحت عليوي ناصر | سمير نوري الجواد
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: علم الارض
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:

التحليل السحني والتتابعية الطباقية لتتابعات الالبين - السنتوني في سورداش - شقلاوة وكركوك، شمال شرق العراق == The Facies Analysis And Sequence Stratigraphy of Albian - Santonian Succession of Surdash - Shaqlawa And Kirkuk, NE. Iraq

اسم المؤلف: ماهر منديل مهدي
اسم المشرف: سعد سامي الشيخلي | مازن يوسف تمر اغا
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: علم الارض
الدرجة: دكتوراه
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: درست سبعة مكاشف سطح?ة امتدت من مد?نة سورداش الى شق?وة خ?ل فترة ا?لب?ن السنتوني وتشمل تلك الفترة التكاو?ن دوكان وكولن?ري وكوم?تان ب?ضافة الى الحد التماس المتمثل بتكو?ن قمجوقة وتكو?ن ش?رانش، ب?ضافة الى خمس ابار نفط?ة من حقلي كركوك وباي حسن وھي وتم تحد?د ارب | Seven outcrops that extend from Surdash to Shaqlawa cities were studied. These outcrops were deposited during the Albian to Santonian. They comprise the Qamchuqa contact, Dokan, Gulneri, Kometan Formations and Shiranish Formation contact. Additionally, fi

النظام النفطي وعائدية نفط حقل حلفاية في محافظة ميسان جنوب العراق == Petroleum System And Hydrocarbon Affinity of Halfaya Oil Field, Messan Governorate, South of Iraq

اسم المؤلف: شهد وديع هاشم المرسومي
اسم المشرف: ثامر خزعل العامري
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: النفط والمكامن
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تمت دراسة تسعة عنات النفط من ست اباروشمل الانتاج من هذا الحقل ف هذه الدراسة من خزانات سعدي,الخصب, مشرف ونهر عمر.وقد شملت الدراسة تحللات الباوماركر للنفط الخام ودراسة النظائر والمؤشرات الحوة لتقم عائدة النفط الخام. المؤشرات الحوة النفط والق | Six oil wells production of nine samples from this field are selected in this study from reservoirs of Sa'adi, Khasib,Mishrif and Nahr Umr Formations. They are analyzed chemically for their crude oil characterization as well as isotopes and biomarkers to

دراسة زلزلزالية تركيبية - طباقية لحقل الظفرية في وسط العراق باستخدام تقنية الابعاد الثلاثة == Structrural And Stratigraphic Study Using Seismic (3D) Technique Dhufria Area (Middle Iraq)

اسم المؤلف: نوفل علي ناصر
اسم المشرف: خالد شهاب المختار | غازي حسن الشرع
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: الجيوفيزياء
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان هذا البحث يمثل دراسة زلزالية انعكاسية ( تركيبية وطباقية) لمنطقة ذات مساحة 366 كم2 واقعة في وسط العراق ضمن محافظة الكوت. تم تفسير معلومات المسح الزلزالي المجسم لحقل الظفرية المنفذ من قبل الفرقة الزلزالية العراقية الاولى باستخدام الهزازات كمصدر للطاقة ال | In this study, a seismic structural and stratigraphic interpretation is made for lower Cretaceous section and Tertiary Oligocene - Damamm basin in Dhufria area. The area of (366.6) sq.km is located in the eastern part of middle of Iraq within the administr

اعادة تفاسير المعلومات الزلزالية لتكوين الجريبي في تركيب حقل الخشم الاحمر وسط شرق العراق == Reinterpretion of Seismic Reflection Data For Jeribe Formation In Khashim Al - Ahmer Structure East Central of Iraq

اسم المؤلف: جنان ابراهيم عويد
اسم المشرف: سلمان زين العابدين خورشيد
الموضوع العام: علم الارض
السنة: 2014
الموضوع الدقيق: الجيوفيزياء
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يقع حقل خشم الاحمر الغازي في شمال - شرق مدينة بعقوبه في العراق في محافظة ديالئ وهو جزء من جبل حمرين ويقع بين الحافة الجنوبيه للمنطقة نطاق الطيات (حزام حمرين - مكحول) ومنطقة نطاق اللاطيات (حزام دجله), اجريت هذه الدراسة لاعادة تفسير التراكيب تحت السطحية ذات | Khashim_AL_Ahmer Gas field is located to the north - east of Baquba city Iraq within Diyala provinces. It is a part of the Jebal Hamrin and is located between the southern edge of the folded zone (Hamrin _ Makhoul belt) and unfolded zone the (Tigris belt)

اخفاء المعلومات في نص عربي باستخدام تقنيات معالجة اللغات الطبيعية == Information Hiding In Arabic Text Using Natural Language Processing Techniques

اسم المؤلف: عبد الرحيم عبد الصاحب عبد الرحيم
اسم المشرف: سهاد مال الله
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: التطور السريع للاتصالات جعل من الصعب للحفاظ على المعلومات في مامن من الاشخاص غير المخولين. بعض المعلومات مهمة وتحتاج الى ان تصنف على انها معلومات سرية مثل الاستخبارات، الاعمال التجارية، والعسكرية... الخ، وتستهدف هذه المعلومات من قبل منافسي المرسل او المت | The fast evolution of communications makes it hard to keep information safe from the unauthorized person. Some information is important and needs to be classified as secret information such as information about Intelligence, Business, Military...etc., th

نظام ادارة معلومات الطلاب == Student Information Management System

اسم المؤلف: دعاء شاكر ناجي
اسم المشرف: لؤي ادور جورج
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: دبلوم عالي
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:

تطبيق الشبكة الخاصة الافتراضية باستخدام محول الشبكة TUN/TAP == A Virtual Private Network With TUN/TAP Adapter

اسم المؤلف: رسول احمد كاظم
اسم المشرف: عماد جاسم محمد
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: دبلوم عالي
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في هذا البحث، تم تطوير شبكة خاصة افتراضية لحل مشاكل امن المعلومات التي يتم نقلها عبر الشبكة للمستخدم، وعبور الجدران النارية المقيدة، وكذلك لربط الحواسيب مع بعضها عبر الشبكة الموسعة.النظام مصمم حسب طريقة الزبون الخادم باستخدام لغة البرمجة - C#. وهذا النظ | In this dissertation, a virtual private network has been developed to solve the issue of network security for the user, cross - over the restrictive firewall, and connect computers through the Wild Area Network (WAN). The application is designed as a clie

العلامة المائية بالاعتماد على تقنيات المسح == Image Watermarking Based on Wipe Technique

اسم المؤلف: شيماء احمد رشيد
اسم المشرف: فيصل غازي محمد
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: دبلوم عالي
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: في السنين الاخيرة الماضية حدثت ثورة في عالم تكنولوجيا الحاسبات في مجال الـ Hardware والـ Software حيث ظهرت العديد من برامج التواصل الاجتماعي وانتشرت بشكل واسع وسريع جدا, حيث لا يكاد شخص لا يملك حساب على الفيس بوك وظهرت الجامعات التي تدرس عن بعد عن طريق ال | In the recent years happened a revolution in the world of computers technology in the field of Hardware and Software, where many of the social media programs have appeared and spread widely and very fast, which is hardly a person does not have an account

تشفير الصوت الحصصي باستخدام تحويل الجيب تمام المنقطع == Share Audio Cryptography Using DCT Transform

اسم المؤلف: سارة سعد علي البغدادي
اسم المشرف: عبير متي يوسف
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة النهرين - كلية العلوم - قسم علوم الحاسوب
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الحماية الفعالة والامنة للمعلومات الحساسة هو مصدر القلق الاساسي في نظم الاتصالات او انظمة التخزين الشبكي، فمن المهم لاي معالجه معلومات هو ضمان عدم العبث بالبيانات.و لتحقيق السرية وسلامة المعلومات والوسائط المتعددة، تم وضع عدة مخططات الحصص السرية المختلفه | An Effective and secure protection of sensitive information is the primary concern in communication systems or network storage systems, it is important for any information process to ensure data is not being tampered. To achieve confidentiality and integr

تصميم وتنفيذ روبوت مخصص لانجاز مهام خاصة بالهندسة المدنية (عملية طلاء الجدران) == Design And Implementation Specified Robot For Civil Engineering Work (Wall Painting Process)

اسم المؤلف: يونس صابر عثمان
اسم المشرف: عبد الستار محمد خضر | معن محمد شاكر
الموضوع العام: علوم الحاسبات
السنة: 2008
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: الجامعة التقنية الشمالية - الكلية التقنية - قسم علوم الحاسبات
اللغة: الانكليزية
مكان الجامعة: الموصل
الصفحات الاولى:
المستخلص: يعتبر تصميم وبناء روبوت تحدي كبير ويتطلب الجمع بين علوم مختلفة مثل الالكترونيات والسيطرة والبرمجة والميكانيك والاتصالات والفيزياء. كما ان تجميع وفحص اجزاء الروبوت يتطلب جهد كبير.الخطوة الاولى في هذا البحث هي تصميم روبوت متنقل يقوم بعملية طلاء جدران قاعة. | The design and implementation of a robotic system is a very big challenge. It requires different integrated fields of sciences, like electrical, control, programming, mechanical, communications, physics, and others. The assembling and testing of the parts

تشفير الرسائل القصيره باستخدام RC4 مع مفتاح متغير بالاعتماد على الاندرويد == Sms Encryption Using RC4 With Dynamic Key Based on Android

اسم المؤلف: سجى طه احمد عبد
اسم المشرف: لؤي ادور جورج
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: تعد خدمة الرسائل القصيرة (اس ام اس) ھي جزء من خدمة الاتصالات المستنده على ارسال النصوص التابعة لانظمة الاتصالات المتنقلة. وبصرف النظر عن الدردشة الالكترونية، اصبحت خدمة الرسائل القصيرة اليوم مصدرا اساسيا لتبادل المعلومات السريھ او الخاصة، كما انھا تلعب دو | Short Message Service (SMS) is a text based communication service component of mobile communication systems. Apart from electronic chatting, SMS has become a fundamental source for communicating confidential or proprietary information. Also, it plays very

تقسيم وتمييز النص العربي المكتوب يدويا == Arabic Hand Written Segmentation And Recognition

اسم المؤلف: منى خلف ضمد
اسم المشرف: بان نديم ذنون يونس | عماد جاسم محمد
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The ultimate aim of handwriting recognition is to make computers able to understand human written texts, with a performance comparable to that of humans. Arabic handwriting recognition is an active research area in pattern recognition and has many practic

تجنب الحواجز للروبوت المتحرك داخليا == Barrier Avoidance For Indoor Mobile Robot

اسم المؤلف: ضحى عبد الله عامر
اسم المشرف: محمد صاحب مهدي الطائي | لؤي كاظم عبود
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The motivation of current research is addressed in establishing a robotic control system to follow a line was drawn on the ground, and then this system has been programmed to avoid the barriers on its way. Thus, the proposed robotic system is designed to

تعديل قواعد الارتباط الموزعة لتحليل الجرائم == Modification Distributed Association Rules For Crimes Analysis

اسم المؤلف: ايناس محمد حسين سعيد
اسم المشرف: عماد كاظم جبار الفتلي | سـكينه حسن هاشم
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: دكتوراه
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: الجريمة منحت الاولوية القصوى من قبل جميع الحكومات لما لها تاثير كبير على المجتمع.ان تحليل الجرائم المعقدة تتطلب الذكاء البشري والخبرة. لقد باتت وكالات تطبيق القانون مثل الشرطة تواجه مشكلة الحجم الكبير للبيانات التي يجب معالجتها وتحويلها الى معلومات مفيدة | Crime is a major issue what has been given the top priority by all governments. Law enforcement agencies like that of police today are faced with large volume of data that must be processed and transformed into useful information. Accordingly to, solving

اقتراح نموذج التعدين لتحليل الشبكات الاجتماعية على الانترنت (الفيسبوك) == Proposed Mining Model For online Social Network Analysis (Facebook)

اسم المؤلف: سراء موفق عبود
اسم المشرف: سكينة حسن هاشم
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: شبكات التواصل الاجتماعي على الانترنت, في بعض الاحيان تسمى وسائل اجتماعية, اصبحت جزء اساسي في حياة معظم الناس اليومية من عملية فحص حسابات الفيسبوك والتويتر حتى عملية النشر فيها, وقائمة الاهتمامات وتحميل اشرطة فيديو اليوتيوب يمكن لهذه الشبكات الاستفادة للمش | Online Social Networks (OSN), sometimes called social media, have become an essential part of most people’s everyday lives, from checking Facebook and Twitter to posting blogs, interesting listings, and uploading of YouTube videos. These networks can leve

نهج جديد للمحادثة الامنه في الوقت الحقيقي == New Approach For Security Chatting In Real Time

اسم المؤلف: سرى خلف اخباله
اسم المشرف: علاء كاظم فرحان
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان اي منظمه لها موظفين فانها تكون بحاجة الى نظام اتصالات فيما بينهم ويمكن استخدام نظام محادثة خاص يعمل على الشبكة الداخلية للمنظمة )انترانت( او عام ويعمل على شبكة الويب )الانترنت( لتبادل المعلومات والاستعلام فيما بينهم. فالمحادثة هي المشاركة المتزامنه في | Any organization having any number of employees needs a communication system which could be used for private conversation on the organization's internal network (intranet) or in working on the Web (Internet) to exchange information and inquiry among its m

تصنيف صور الماموكرام باستخدام التحويلات الكنتورية == Mammogram Images Classification Using Contourlet Transform

اسم المؤلف: زينب فوزي عبد
اسم المشرف: مثيل عماد الدين عبد المنعم
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الكلمات الدلالية:
  • Mammogram Image
  • Classification
  • Contourlet Transform
  • Wavelet Transform
  • Otsu's Thresholding
الصفحات الاولى:
المستخلص: Breast cancer is the most common malignancy in adult females and is the second most common disease that may lead to death. Early detection is important for manage breast cancer that give a better chance of full recovery. The detection rate can be increase

خوارزمية تصنيف شجرة القرار الامثل لمجموعة بيانات == An Optimized Decision Tree Classification Algorithm For A Data Set

اسم المؤلف: احسان ا. كريم
اسم المشرف: Mehdi G. Duaimi
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: A decision tree is an important classification technique in data mining classification. Decision trees have proved to be valuable tools for the classi?cation, description, and generalization of data. Work on building decision trees for data sets exists in

ضغط البيانات باستخدام تمثيل الترميز التسلسلي == Data Compression By Using Chain Code Representation

اسم المؤلف: فنر علي جودة
اسم المشرف: توفيق عبد الخالق الاسدي
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة بابل - كلية تكنولوجيا المعلومات - قسم البرامجيات
اللغة: الانكليزية
مكان الجامعة: بابل
الصفحات الاولى:
المستخلص: In this thesis we have proposed an efficient lossless image compression system. This system consists of two parts : the first part is compression procedure that is based on two approaches of chain code representation. The first approach is Variable Vertex

طريقه جديدة لكشف واستخراج التزوير من اللوحات الفنية == New Method For Detect And Extract Forgery From Paintings

اسم المؤلف: سبا راكان سالم
اسم المشرف: هناء محسن احمد
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: الجامعة التكنولوجية
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: نظرا لتوفير العديد من برامج تحرير الصور وادوات معالجتها, مما ادى الى سهوله التغير على المعلومات التي تحملها اللوحات دون ترك اي اثار واضحه عليها جراء العبث بها والتي ادت الي مشكله التحقق من الصور. ومما ادت هذة القضايا المتعلقة بامن الوسائط المتعدده في تطو | Due to availability of many image editing and processing tools, it is possible to easily change the information represented by a digital paintings without leaving any obvious traces of tampering, which led to the problem of verification the image.These i

اكتشاف العيب للصور الشعاعية مع التعليق باستخدام المربع الاصغر لماكنة الدعم الموجه وقواعد عامة وخاصة للتصنيف == Defect Detection of Radiography Image With Annotation Using Lssvm_Gsc Techniques

اسم المؤلف: وفاء محمد سعيد الاسدي
اسم المشرف: يحيى مهدي هادي الميالي
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: دكتوراه
الجامعة: جامعة بابل - كلية العلوم - قسم الحاسبات
اللغة: الانكليزية
مكان الجامعة: بابل
الكلمات الدلالية:
  • Image Processing
  • Weld Image Defect Detection
  • Image annotation
  • Radiography Image
الصفحات الاولى:
المستخلص: استرشادا بالشعوربالمسؤولية ورغبة في مساعدة اكتساب معرفة عميقة حول دراسة تنوع العيوب في صور التصوير الشعاعي، لهذا سنتعرف على هذه العيوب الموجودة في هذه الصور، ومن ثم اعطاء كل صورة بعض الكلمات التي تعكس محتوياتها الرئيسية، وبناء قاعدة بيانات للصور مع الشرح | Guided by the sense of responsibility and its desire to help gain a deep knowledge and the diversity of the defects exist in the radiography images, this Dissertation recognizes the defects exist in the these images, then given each image some keywords re

مقياس اسلوب المؤلفات الادبية للنصوص العربية == Stylometric Authorship Arabic Text Detection

اسم المؤلف: عمار عادل عبد الرزاق
اسم المشرف: طريف كامل مصطفى
الموضوع العام: علوم الحاسبات
السنة: 2014
الموضوع الدقيق: علوم الحاسبات
الدرجة: ماجستير
الجامعة: جامعة بغداد
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ان التدوين والنشر الالكتروني جعل عمليات السرقة متاحة وسهلة، وخاصة في مجال المؤلفات الادبية، لذلك اصبح من الضروري وضع بصمة خاصة للمؤلف لمنع عملية الانتحال. التحليل والتنقيب عن النص يعتبر من اهم السمات لقياس اسلوب المؤلف، على سبيل المثال، المؤلفات والرواي | The electronic publications made the theft operations easy and accessible, especially in the field of the literature; therefore, it became necessary to put a style print for the author to prevent the plagiarism.Stylometric authorship attribution is conce
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