البحث — المستودع الرقمي العراقي

نتائج البحث: 25 من أصل 379

To Obtain The Phase Portrait and Least Integral Square Error of a System by Use of The Analogue Computer

اسم المؤلف: Waled Aman Aahmed

اسم المشرف: Janan Allos

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1978

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

GENERAL PURPOSE MICROCOMPUTER CONTROLLER

اسم المؤلف: HUSSAIN H. H. SHAHIN

اسم المشرف: suhail saadallah

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1992

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

Simulation of a Three - Dimensional Aircraft Recognition and manitoring Vision System Based on PC

اسم المؤلف: Firas H. Al-Baghdadi

اسم المشرف: Rawa A. K. Said | Waleed A. Mahmoud

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1997

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

Adaptiv Digital Filter Realization Using Distributed Arithmetic

اسم المؤلف: Al - Hassany Firas Ali Jwad

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1993

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Digital electronics%Electrioc filters,Digital%Thsis

DAMPING AND SYNCHRONISING TORQUES OF A REGULATED D・W.R. SYNCHRONOUS MACHINE

اسم المؤلف: MOHAMMAD AHMED KHALIFA

اسم المشرف: V. K. BHANS ALI

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1981

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد - كلية الهندسة - قسم الهندسة الكهربائية

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

Performance and Design of Single Phase Induction Motors

اسم المؤلف: Kais Said Ismail Al Sabagh

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1976

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

Automatic Clarifiers For Ssb Speech Communication

اسم المؤلف: Hasan Waryosh Helo

اسم المشرف: saleh R. Al - Araji

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1978

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

Design of Cash Register System Using Microprocessors

اسم المؤلف: Faiz Khalil Abdul-Ahad

اسم المشرف: Suhail Saadallah

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1981

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

الصفحات الاولى:

Design and Implementation of an Intelligent Arabic Terminal

اسم المؤلف: Safaa Abd-Ulhay Abass Al-Janaby

اسم المشرف: Suhail Saad Allaf

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1983

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

اللغة: الانكليزية

مكان الجامعة: بغداد

Digital Transduction System For The Measurement Ofmultiplexed Physical Variables

اسم المؤلف: waleed kadhum muslih .

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 1982

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

/transducers./ /electronic instruments,digital./ /electronic measurements./

ExperiMental And Computational Investigation Of Developing Laminar mixed convection Through Concentric Annuli With Asymmetric Hearing

اسم المؤلف: nAJIMaBEDkADHUM

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

الموضوع الدقيق: هندسة الكهرباء

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

Static Var Compensator Svc Modeling For The Iragi National Super High Voltage Grid System

اسم المؤلف: Arshad abduljabbar najim

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2011

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Electric engineering

Particale Swarmoptimization - Pso Based Optimal Power Flow For The Iraqi Ehv Network

اسم المؤلف: Monther Fadhil Meteb

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2012

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Electric power distribution

A Study Of Harmonies In Pulse Width Modulation Power Inverter As A Motor Drive

اسم المؤلف: Hussein Tekleef Kadhum

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2009

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Pulse modulation - Electronics

An Algorithm For Reactive Power Management In Power System Using Artificial Neural Networks

اسم المؤلف: Aseel Hassan Maktoof

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2012

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Electric power systems

Design And Implementation Of A Two Axes Sun Tracking System For Flat Solar Panels

اسم المؤلف: Ayad Mahmood Kwad

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2012

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Solar energy

Turbo Generator Unit Control Through Excitation / Gorerning Systems Using Ppc

اسم المؤلف: wisam saad abdul qader

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2011

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

electric power - electric

Analysis Of Buck Boost Ac Chopper Fed Capacitor Run Induction Motor

اسم المؤلف: Shams Wael Kamel

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2013

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Power electronics

Parametric Study Of Active Solar Heater Using A Pebble Bed As Athermal Collector And Storage

اسم المؤلف: Mustafa Mahdi Mustafa

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2013

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Solar heating

Cooling And Heating A Green House In Baghdad By A Solar Assisted Desiccant System

اسم المؤلف: Mustafa Moayad Hasan

الموضوع العام: هندسة الكهرباء والالكترون والاتصالات

السنة: 2012

الموضوع الدقيق: هندسة الكهرباء

الدرجة: ماجستير

الجامعة: جامعة بغداد

مكان الجامعة: بغداد

الكلمات الدلالية:

Solar heating

نموذج مقترح للتعامل مع فشل العقدة في شبكة الاستشعار اللاسلكية == Proposed Model To Handle Node Failure In Wireless Sensor Network

اسم المؤلف: مصطفى خالد مزعل

اسم المشرف: ضياء جاسم كاظم

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: Wireless Sensor Network (WSN) contains many low cost and low power sensor nodes (SNs), these nodes may fail to communicate with each other according to some reasons such as battery lifetime, uncontrolled events or any surrounding environment actions which will lead to partition the network and reduce the Quality of Service (QoS) as well as the reliability and efficiency of the whole network. The motivation of this work was detecting these malfunctions using three approaches considered with two proposed network models : random distributed SNs and real model.Firstly, localization approach in WSN are discussed and verified using four classic localization methods to detect any failed SN, which are : Distance Vector (DV - Hop), Angle of Arrival (AoA), Time of Arrival (ToA) and Received Signal Strength Indicator (RSSI). These methods are analyzed and implemented for three different areas, each with three different numbers of SNs. All of them are implemented using MATLAB programming language. Secondly a known fault detection method called Distributed Fault Detection (DFD) discussed and implemented using MATLAB also, and a new method developed from this method named (MDFD) to overcome the disadvantages of DFD method. Finally the feature of the connectivity of the SNs themselves within the network is exploited by using two Medium Access Control (MAC) protocol standards : Sleep Medium Access Control (SMAC) and Tune Medium Access Control (TMAC) protocols, then proposed a modified MAC protocol (MMAC) to enhance the most affecting factors of these two MAC standards such as energy consumption and latency. The performance analysis of these three MAC protocols is verified and simulated using a real model for Iraq, Baghdad, Al - Kadhumyah City, by Castalia 3.2 simulator also designed and implemented these three protocols using an iOS application by the XCode program for general application sensors especially for explosives detection sensors, Fido® X3 sensor proposed forthis application. Simulation results showed that the localization methods proved their ability to localize the failed SNs, but with impractical errors (about 23%) in results than the other approaches, and additional load effect on the network due to execute the localization programs separately before each node failure detection. The DFD approach applied with homogeneous WSNs only that contain only one type of sensors, its errors (starting from 25% for three SNs) was due to its algorithm limitations in using only half of the neighbor SNs, reduced in MDFD method algorithm in which all neighbor SNs considered to detect the failed SN reaching full detection accuracy but with latency tradeoff. The MAC approach is better than localization approach because there is no need to additional hardware for node failure detection; it is also better than DFD approach because it was applicable with both homogeneous and nonhomogeneous WSNs. The three MAC protocols succeeded to detect the failed SNs, but SMAC and TMAC had their tradeoff in energy consumption and latency, when SMAC had less energy consumption (69.62% than TMAC), while TMAC had less latency (27.58% than SMAC). MMAC is combining the advantages of both SMAC and TMAC that had a less energy consumption than that in SMAC by 54.16% and smaller latency than that in TMAC by 76.19% within a range of division index m : between 1 to 5.

مقترح بروتوكول توجيه الانترنيت الاشياء بالاعتماد على شبكات الاستشعار اللاسلكية == Proposed Routing Protocol For Internet of Things Based On Wireless Sensor Networks

اسم المؤلف: عمر عبد الستار حماد

اسم المشرف: ضياء جاسم كاظم

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 routing protocol designed for Internet of Things (IoT) systems has to be adapted with different applications requirements in order to enhance the performance of IoT applications. Therefore, the main objective of this thesis is proposing a routing protocol for wireless sensor network employed to serve IoT systems. A new IoT architecture was proposed with explaining the main functions of each layer forming the proposed architecture. The proposed routing protocol acted according to the tasks specified in this architecture. In addition, an IoT application was proposed to be applicable in some utility organizations. The link quality, node depth and energy were used as metrics to make routing decisions. In this work, different cases were proposed to exhibit the usage of these metrics and show the differences of using each of them, then examine different techniques which deal with link quality and the difference between using node - to - node link quality and end - to - end link quality. Improvements were added to the proposed routing protocol to achieve the perfect integration with suitable Media Access Control (MAC) protocol with taking into consideration the behavior of IoT application. Regarding this orientation, two approaches were suggested; the first includes the proposed routing protocol, application with high data rate and MAC protocol without sleeping capabilities; while the second approach included the proposed routing protocol, application with dynamic data rate and MAC protocol with sleeping capabilities. Comparison with other protocols was essential to show the improvements achieved by this work, thus protocols designed to serve the same purpose such as AODV, REL and LABILE were chosen to compare the proposed routing protocol with. To add integrative and holistic, some of important features such as actuating and mobility were added and tested. These features were greatly required by some of IoT applications and improving the routing protocol to support them made it more suitable for IoT systems. The proposed routing protocol was simulated using Castalia - 3.2 and all proposed approaches were examined to show the enhancement achieved by each approach. The results showed better performance when using end - to - end link quality. The results also showed the effect of MAC protocol if decreasing energy consumption was required. Sleeping MAC was the best choice when used with the proposed routing protocol while reducing the data rate. The proposed routing showed better performance than other protocols did regarding Packet Delivery Ratio (PDR) and latency. It preserved network reliability since it did not generate routing or data packets needlessly. Routing protocol with added features (actuating and mobility) showed good performance. But that performance was affected by increasing the speed of mobile nodes.

تصميم هوائي ضوئي يعمل ضمن نطاق تحت الحمراء الترددي باستخدام تقنية البلازمونك == Optical Antenna Design In Ir Range Using Plasmonic Technology

اسم المؤلف: هادي كريم شمخي

اسم المشرف: محمد ناظم 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: Optical antennas, resonant structures, which efficiently collect free - space light and focus it into a nanoscale volume using plasmonic, are indispensable in the burgeoning field of nanophotonics. In this work, resonance behaviors of the fundamental resonance mode of diabolo gold metal bar optical antennas were investigated. The relationship between the near - field enhancement, absorption, and scattering spectra of localized plasmonic elements was explored. It was found that as the waist of the diabolo gold metal bar optical antenna was reduced, optical energy absorption cross section and near field enhancement at resonance increased significantly. Also reduction of the diabolo waist width caused redshift of the resonant wavelengths in the spectra of absorption cross - section, scattering cross - section, and the near electric field. Oppositely, it was found that as the length of the diabolo gold metal bar optical antenna was reduced, optical energy absorption cross section and near field enhancement at resonance decreases significantly. Also reduction of the diabolo length caused blue - shift of the resonant wavelengths in the spectra of absorption cross - section, scattering cross - section, and the near electric field.Grating surface diabolo antenna design was proposed. It was found that grating superstructure perturbed the optical properties of SPPs (Surface Plasmon polarions) and enabled the control of resonance wavelength of the antenna. The grating reduced the power that flow out from the antenna and enhanced the localized electromagnetic fields intensity. The grating also increased surface plasmon currents because of the formation of bound surface states. As a result, the absorption spectra and near field intensity were enhanced but at the same time, the scattering spectra and the far field pattern were reduced.Titanium - Gold grating surface diabolo antenna was proposed. It was found that titanium metal strengthen the grating perturbation of the optical properties of SPPs and allowed wide range of wavelength shifting (3.5 ?m). Because Gold and Titanium have difference electrical resonance characteristics, less plasmon damping occurred, resulting in lower scattering efficiency and narrower plasmon line widths.Finally, system modelling and simulations is done by using electrical department super computer (24 parallel MP and 64 GB RAM) and COMSOL multiphysics 4.4 software.

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.