Show: 25 50 75 100 Results

Search results: 25 out of 171

تحليل واعادة تصميم منظومة رادارية عالية الدقة باستخدام الحاسبة الالكترونية == Computer Analysis And Redesign Of High Precision Radar Control System

Author name: رياض عبد ربه عباس
Supervisor name: منذر التكريتي | محمود علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

الترميز المتسلسل للاشارات الرقمية بالمسارات متعددة الخفوت لقنوات الترددات العالية == Concatenated Coding Of Digital Signals For Multipath Fading HF Channels

Author name: غانم عبد الكريم الربيعي
Supervisor name: ماهر العزاوي | ستار المالكي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

نظام خبير لتشخيص الاعطال باستخدام شبكة الحوسبة الرياضية لنمذجة المخيخ == Fault Diagnosis Expert System Using CMAC Network

Author name: علي حبيب ناصر
Supervisor name: منذر التكريتي | سعدي خضير
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

ضغط الصور الرقمية المتتابعة زمنيا == Interframe Digital Image Compression

Author name: فرحان محمد علي نشوان
Supervisor name: لؤي جوري | مزهر العاني
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تحليل واعادة تصميم مسيطر مؤازرة رادار تتبع ذو الدقة العالية باستخدام تقنية رقمية == Analysis And Re - Design Of High Pregcision Tracking Radar Servo Controller By Using Digital Techniques

Author name: امل ابراهيم ناصر الشمري
Supervisor name: منتظر التكريتي | محمود علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تنغيم المسيطرة المنطقي الغامض باستخدام الخوارزميات الجينية == Tuning Of Fuzzy Logic Controller Using Genetic Algorithms

Author name: رقية شلال حبيب الجبوري
Supervisor name: منذر نعمان التكريتي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

الاختبارات الشيئية للكلام == Objective Tests Of Speech Signal

Author name: طارق مصطفى كمال طاشان
Supervisor name: ماهر خضير محمود العزاوي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

اكتساب اشارات الطيف المنتشر (القفز الترددي) باستخدام التخمين الطيفي == Acquisition Of Frequency Hopping Signals Based Spectral Estimation

Author name: نزار ناجي عبد الامير البصام
Supervisor name: ماهر العزاوي | ستار المالكي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تنغيم المسيطر المنطقي الغامض جينيا == Genetically Tuned Fuzzy Logic Controller

Author name: نادية صخي عواد الخالدي
Supervisor name: منذر نعمان التكريتي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

منظومة جمع وسيطرة البيانات في الزمن الحقيقي باستخدام PCI == PCI - Based Real Time Data Acquisition And Control System

Author name: عمار علي سهراب
Supervisor name: منتظر التكريتي | كمال يوسف
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

استخدام السيطرة الذكية في قوانين التوجيه الذاتي == The Use Of Intelligent Control In Homing Guidance Laws

Author name: عمار غالب سمير
Supervisor name: منذر نعمان بكر التكريتي | سعدي عباس خضير
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electronics and Communications Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تحسين تخمين موقع الهدف لرادار احادي النبضة == Improvement of Target Position Prediction In Monopulse Tracker

Author name: موسى هادي والي البديري
Supervisor name: وليد خالد | محمود علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تخمين زاوية الانحراف وزاوية الارتفاع باستخدام مصفوفة ثنائية الابعاد بالاعتماد على طريقة اسبرت == Estimation Of Azimuth And Elevation Angles By Using Equally Spacing Planar Array Based On Esprit Method

Author name: مالك جاسم فرحان الخالدي
Supervisor name: بيان صبار | ماهر العزاوي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ هوائي مصفوفة الاقطاب ذات التكرار اللوغارتمي == Design And Practical Imentation Of Log Periodic Dipole Antenna

Author name: حسين علي عبد النبي
Supervisor name: وليد علي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

كبس الصور باستخدام تحويل المويجة == Image Compression Using Wavelet Transform

Author name: ولاء محمد حسن خلف الوائلي
Supervisor name: مزهر شعبان الهاني | ياس عباس السلطاني
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electronics and Communications Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تقنيات التشفير المحسنة للصور الطبية باستخدام تحويل المويجة == Adaptive Medical Images Coding Technipues Using Wavelet Transform

Author name: محمد حاتم خضير العبيدي
Supervisor name: منذر التكريتي | علي الزخي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electronics and Communications Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

تعزيز المقطع الراديوي باستخدام الهوائي الزئبقي

Author name: زيد اسعد
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
University location: Baghdad

تقنيات تقليل الفصوص الجانبية لرادار ضغط النبضة المرمزه طوريا

Author name: ماجد حامد نصار
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
University location: Baghdad

تطوير تبسيط وتطبيقات انواع مختلفة من دوال المفتاحية الغامضة

Author name: ميسم عبد الجليل
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
University location: Baghdad

تصميم محولة التردد العالي والمحاثة لمحولات نوع (DC-DC) == Design of High Frequency Transformer and Inductor for DC-DC Converters

Author name: ريم فلاح حسن
Supervisor name: قاسم رشيد حميد
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering - Power and Machinery
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

الضغط وازالة الضوضاء من الفيديو اعتمادا على التحويلات الكنتورية == Video Compression and Denoising Based Contourlet Transform

Author name: زيد هيثم قاسم
Supervisor name: ماهر خضير
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electronics and Communications Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:

حساب توزيع الطاقة الممتصة في راس الانسان باستخدام نطاق الفرق الزمني المحدد لانظمة الاتصالات المتنقلة == Computation Of Sar Distribution In Human Head For Cellurlar Mobile Communication Systems Using Fdtd

Author name: هويدا كمال عبد الفتاح
Supervisor name: عضيد حسن سلومي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electronics and Communications Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: Widespread wireless communications system in the last few years, leads people to ask many questions about the advantages and disadvantages of those systems, especially about electromagnetic waves pollution and their effect on human health.The mobile device is frequently used by the general public from adult to child, one of the main sources of electromagnetic waves and very close to the human head. Therefore the focus of this research on the impact of electromagnetic waves from mobile to human health by measuring the Specific Absorption Rate (SAR), at the human head and the hand through SEMCAD - X that uses the Finite Different Time Domain (FDTD). SAR computation uses (FDTD) in the way the limited space of time, to calculate the specific absorption rate. The results have been compared with standards averaged over any 1 g of tissue and averaged over any 10 g of tissue. It didn't exceed the applicable standard.This work evaluates specific absorption rate (SAR) at different ages of three people. Firstly, old man, who was estimated to head 100% size of header used in the program SEMCAD - X. Secondly Adult man was estimated his head by 85% size of header used in program, and finally the child who was estimated his head by 65% size of header used in the program SEMCAD - X, the design hand has been used with all cases.The design of the mobile phone software works in four different packages of frequencies; the packets are the center frequencies 900MHz 1800MHz, 2100MHz and 2400MHz, when increased frequency the SAR increased but in the some state and frequency decreasing.The Evaluation of SAR in the head and the hand of the user device and the generic phone, the highest value of SAR decreases with increasing distance between the generic phone and the user's head and reducing the proportion was 50% for the old man, 40% for adult man and 35% for child. It can be noted that the angle of the rotation of the various frequencies is not fixed, while the ratio approximately is 25% for each angle of rotation.Also, it can be noted that for fixed frequency, the input power is increased to a double and the SAR have been used increased almost to a double.The different positions show that the methods of holding generic phone have a significant impact on the value of SAR. Therefore, the value of SAR can be reduced into 90% when using the correct method.The evaluation of SAR in these cases shows their influence on children and it was much greater than the adult human or old human by parentage 40% old man and 35% adult man.

تمييز الحروف العربية المعزولة المكتوبة بخط اليد باستخدام الشبكات العصبية == Recognition Of Isolated Handwritten Arabic Letters Using Neural Networks

Author name: نهلة ظاهر حبيب بهية
Supervisor name: منذر نعمان التكريتي
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: يتناول هذا البحث مشكلة تمييز الحروف العربية المعزولة المكتوبة بخط اليد باستخدام الشبكات العصبية. ان نظام تمييز الحروف العربية المقترح يتكون من ثلاث مراحل وهي : مرحلة مسح صور الحروف العربية ثم مرحلة معالجة الصور واخيرا مرحلة التدريب والتصنيف.ان المرحلة الاخ | This thesis presents an algorithm for recognition of an off - line isolated handwritten Arabic letters using neural networks.The handwritten recognition system present in this work consists of three modules : - 1 - Arabic letter scanning module 2 - Arabic letter preprocessing module 3 - Learning and recognition module.The proposed neural network in the third module is trained in two stages : The first stage employs Self - Organizing Map learning algorithm for clustering the input pattern, which are based on a database of 196 letters collected from 7 independent persons.In the second stage each of the similar output cluster is considered as a subnet introduced to neural network trained by Back - propagation learning algorithm for classification. Several networks architecture are designed in the second stage using 1 - hidden and 2 - hidden layers with 5 and 28 output nodes in the output layer with different number of hidden nodes and learning rate.To examine the efficiency of the system a database of 196 letters collected from other 7 independent persons are used, (in order to test the ability of the trained network to generalize). The results show that clustering the input pattern, using 1 - hidden layer and 28 nodes in output layer improve the network performance. The system was implemented using (IBM - PC) of type Pentium 3.The programming language used to design the system was c++ version 5.02.

استراتيجية السيطرة على المقوم ثلاثي الاطوار المضمن بعرض النبضة (PWM) نوع رافع للجهد ولمصدر تغذية متغير الحالات

Author name: منتظر كاظم عبد الله
Supervisor name: تركي كحيوش حسن
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: In this thesis, a proposed control strategy is presented to improve the performance of the PWM boost type rectifier when operating under different supply voltage conditions (balanced, unbalanced, and distorted three - phase supply voltages). The proposed control strategy is classified into two parts, the first part is voltage controller and the second part is current controller. In the voltage controller, Repetitive Controller (RC) is used to reduce the even order harmonics in the regulated output dc voltage (5.62V (P.P.)) so small output capacitor (480µF) is used instead of large capacitor (920µF) that is used with the conventional controller (PI controller connected in series with a LPF). RC also reduces the even order harmonics (0.014A (P.P)) which appears in the reflected dc current (IMAX), this leads to reduce the odd order harmonics (0.01A) which appears in the input currents. While in the current controller, enhanced Phase Locked Loop (EPLL) technique is used to obtain sinusoidal and balanced three phases, to construct the reference currents, which are in phase with the fundamental supply voltages Therefore, the supply - side power factor is kept close to unity (0.9036 for extremely distorting case). As a result the calculations of the reference currents in the proposed control strategy does not require Clarke or Park transformations, the same for the calculations of the positive or negative sequence components. A proportional controller is used to give excellent tracking between the line and the reference currents. Using this approach makes the control strategy easy to understand and also it saves calculation time of the control algorithms if implements in real time. The complete system with the proposed control strategy is simulated using Matlab/Simulink (Version 2012). The obtained results for the complete system using repetitive voltage controller are compared to the results of the system with using the conventional voltage controller. The results with the repetitive controller show better responses and stable operation in the steady state under different input voltage conditions, as well as in the transient response under different disturbances.

مبدل فوتوفولطائي مايكروي احادي المرحلة نوع فلايباك المغذي للشبكة == Single Stage Grid - Connected Flyback Photovoltaic Microinverter

Author name: مصطفى عباس فضل
Supervisor name: تركي كحیوش حسن
General topic: Electrical, Electronic and Communications Engineering
Specific topic: Electrical Engineering - Power and Machinery
Degree: Master
University: Mustansiriyah University - College Of Engineering - Department Of Electrical Engineering
Language: English
University location: Baghdad
First pages:
Abstract: Solar energy systems based on photovoltaic (PV) cells have attracted considerable interest in recent years due to their abilities of clear and seemingly limitless generated energy. Solar energy systems based on microinverter architectures are earning in publicity as they are less prone to shading and PV cell malfunction since each PV panel in the system has its own low power inverter.In this thesis two alternative modes of operation for the current source flyback microinverter are suggested : the discontinuous conduction mode (DCM), where a constant switching frequency (CSF) control method is applied, and the boundary conduction mode (BCM) between continuous conduction mode (CCM) and DCM, where a variable switching frequency (VSF) control method is used. These two control methods are analytically studied and compared in order to establish their advantages as well as their suitability for the development of an inverter for grid - connected PV applications.An optimum design methodology is developed, aiming for an inverter with the smallest possible volume for the maximum power transfer to the public grid and wide PV energy exploitation. The main advantages of the current source flyback microinverter are very high power density and high efficiency due to its simple structure, as well as high power factorregulation. The design and control methodology are validated by Powersimulation software (PSIM) and a laboratory hardware prototype is buildusing analogue and digital devices.The microcontroller type (PIC - 18F45K22) is used to implement perturb and observe (P&O) maximum power point tracking (MPPT) algorithm, and C language is used for programing the microcontroller. The simulation and experimental results are obtained to verify the proposed flyback microinverter.
1 2 3 4 5 6 7