Show: 25 50 75 100 Results

Search results: 50 out of 357

امنية الصورة عبر شبكة الاستشعار اللاسلكية == Image Security Over Wireless Sensor Network

Author name: حيدر فاضل ياسين حسين
Supervisor name: وائل عبد الحسن هادي
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

التفسير اللغوي لتعبير الوجه بناء على خوارزمية الذكاء الاصطناعي == Linguistic Interpretation of Facial Expression Based on Artificial Intelligent Algorithm

Author name: حيدر عبد القادر اسماعيل
Supervisor name: ايفان عبد الزهرة هاشم | بسام حميد عبد
Degree: Master
Language: English
University location: Baghdad
First pages:

متانة كشف وعزل الاعطال بالاستناد على مراقبة النمط الانزلاقي == Sliding Mode Observer Based Robust Fault Detection and Isolation

Author name: حوراء فؤاد باقر
Supervisor name: عباس حسين عيسى
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم ثنائي النسق مزدوج الحزمة لمرشح تمرير الحزمة الترددية لتطبيقات الاتصالات اللاسلكية == Design of Dual - Mode Dual - Band MicrostripBPF for Wireless Communication Applications

Author name: حنان جبار عبد الكريم
Supervisor name: عماد شهاب احمد
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

نظام التعرف على الوجه المستند الى نموذج ماركوف المخفي المعدل == Face Recognition System based on Modified Hidden Markov Model

Author name: حميد رسول فرحان
Supervisor name: محمود حمزة محمد | ثامر رشيد سعيد
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتوصيف هوائي تيرا هرتز باستخدام الجرافين كموصل مغناطيسي اصطناعي == Design and Characterization of THz Antenna Using Graphene - Based Artificial Magnetic Conductor

Author name: حسين علي عبد النبي
Supervisor name: رفعت طالب حسين | رعد سامي فياض
Specific topic: Communications Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تحليل اداء قبول الاتصال في تعدد الوصول بتقسيم الترميز الهاتف الخلوي == Performance Analysis of Call Admission Control in WCDMA Cellular Phone

Author name: حسين علي حسين
Supervisor name: وائل عبد الحسن هادي
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم منظومة اتصالات - لاسلكية هجينة تحت الماء == Design of Underwater Hybrid Wireless - Communication System

Author name: حسن محمود عزاوي
Supervisor name: علاء حسين علي | شهاب احمد كاظم
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ حوسبة حسابية خاصة == Desing and Implementaion of Private Could Cmputing

Author name: حسن عبد الامير خلف
Supervisor name: ابتسام رحيمة كريخي
Specific topic: Communications Engineering
Degree: Higher Diploma
Language: English
University location: Baghdad
First pages:

تحليل وتشخيص اشارات تخطيط قلب الانسان باستخدام تحويل المويجات == ECG Signal Analysis Using Wavelet Transform

Author name: حسام عبد الحسين وهاب
Supervisor name: هديل نصرت عبد الله
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم نظام كشف الخداع وتنفيد المصنف VG - RAM باستخدام مصفوفة البوابات المنطقية القابلة للبرمجة موقعيا == Design of Deceptive Detection System and FPGA Implementation of VG - RAM Classifier

Author name: حارث حازم ذنون
Supervisor name: وسام حسن علي | ايفان عبد الزهرة هاشم
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم مرشحات مصغرة ذات امرار نطاقي وتنفيذها اعتمادا على المرنان المقترن بخط نقل والتركيب ذي الارضية المشوهة ذات اشكال منكوفسكي الكسورية == Design and Implementation of Compact Bandpass Filters Based on Minkowski Fractal Stub LoadedResonator and Defected Ground Structure

Author name: جواد كاظم علي
Supervisor name: ھادي طارش زبون
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ طرف صناعي علوي اعتمادا على اشارات الكلام واستجابة العضلة == Design and Implementation of a Prosthetic Hand Based on Speech & EMG Signals

Author name: جبار سلمان حسين
Supervisor name: علاء حسين علي | ثامر رشيد سعيد
Specific topic: Electronic Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تحسين اداء ليزر نقط الكم ذات انبعاث الحافة للاتصالات البصرية == Performance Improvement of Quantum - Dot Edge - Emitting Laser for Optical Communication

Author name: جاسم محمد صحن
Supervisor name: ثائرة زكريا الطيار | هادي طارش زبون
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ الخوارزمية الذكية لتشخيص مرض القلب باستخدام مصفوفات البوابات المنطقية القابلة للبرمجة موقعيا == Design and Implementation of Intelligent Algorithm for the Diagnosis of Heart Disease Using FPGA

Author name: تبرير طارق حسن
Supervisor name: منال حمادي جاسم د. ايفان عبد الزهرة هاشم
Degree: Master
Language: English
University location: Baghdad
First pages:

تنفيذ مرشح ايقاف حزمي متعدد النطاق مصغر باستخدام الشريط المايكروي المنشق == Implementation of Compact Multiple Band - Rejection Filter Using Defected Microstrip Structure (DMS)

Author name: بشار هادي حميد
Supervisor name: رائد ثعبان حمد
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ نظام التشخيص للصورة البيانية الكهربائية للقلب == Design and Implementation of Diagnostic ECG System

Author name: بسام حميد عبد
Supervisor name: محمود حمزة المفرجي | رائد خالد ابراهيم
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تقليل ضوضاء اشارة التحفيز العضلي وتنفيذها على ذراع الي باستخدام المسيطر الدقيق 8051 == Denoising EMG Signal and Its Implementation for a Robot Arm Using 8051 Microcontroller

Author name: انس فؤاد احمد
Supervisor name: اياد ابراهيم عباس | خالدة شعبان رجب
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ الشبكة العصبية الاصطناعية للروبوت المتحرك المستندة على البوابات المنطقية القابلة للبرمجة == Design and Implementation of Artificial Neural Network for Mobile Robot based on FPGA

Author name: امير حسين محمد
Supervisor name: امير حسين محمد
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تحسين الاداء لنظام الاتصالات LTE باستخدام تقنية التشفير LDPC == Performance Enhancement of LTE Communication System by Using LDPC Encoding Technique

Author name: امجد علي جاسم
Supervisor name: وائل عبد الحسن هادي
Specific topic: Communications Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تخطيط وامثمة شبكات LTE وWiMAX لمدينة بغداد == PLANNING AND OPTIMIZATION OF WiMAX AND LTE NETWORKS FOR BAGHDAD CITY

Author name: اسيل حميد النقاش
Supervisor name: عايد السامرائي | هيام الياسري
Specific topic: Communications Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تحسين اداء تتبع الاجسام فديويا == IMPROVEMENT THE PERFORMANCE OF VIDEO OBJECT TRACKING

Author name: اسيل حاتم كيطان
Supervisor name: ثامر رشيد سعيد
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ مرشحات الترددات العالية باستخدام رقاقة FPGA == High Pass FIR Filter Design and Implementation Using FPGA

Author name: اسعد حميد سهر
Supervisor name: منال حمادي جاسم
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

شبكة استشعار ذكية داخلية لاول اوكسيد الكاربون مستندة الى اتصال فضاء حر ضوئي == Intelligent Indoor CO Sensor Network Based on FSO Communication

Author name: ازاد بدر سعید
Supervisor name: حنان عبد الرضا عكار | عاید خلف محمد
Specific topic: Electronic Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تصميم نظام هجين من الشبكات العصبية والمنطق الضبابي لكشف وعزل الاعطال في ذراع الروبوت == A Hybrid Neural - Fuzzy Network Based Fault Detection and Isolation System for Robot Manipulator

Author name: اركان علي جاسم
Supervisor name: عباس حسين عيسى | قصي عبد الجبار جوا د
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ مضمن متعدد النغمات باستخدام مصفوفة البوابات المنطقية المبرمجة == Design and Implementation of Discrete Multitone Modulator Using FPGA

Author name: اخلاص محمود فرحان
Supervisor name: هادي طارش زبون
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ نظام نقل طاقة لاسلكيا لتطبيقات عبر انسجة الانسان == Design and Implementation of Wireless Power Transfer System for Transcutaneous Applications

Author name: احمد عياد ابراهيم
Supervisor name: احمد سعدون عز الدين
Degree: Master
Language: English
University location: Baghdad
First pages:

تمثيل الكيبل الضوئي احادي القناة لتعويض التشتت باستخدام طرق تعويض مختلفة == Simulation of Single Channel Optical System to Compensate Dispersion by using Different Compensating Methods

Author name: احمد علاء عبد الامير
Supervisor name: حيدر مالك عبد الهادي
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ نظام استشعار للطاقه للراديو الادراكي == Design and Implementation of Energy Sensing System for Cognitive Radio

Author name: احمد عبد الرضا ثابت
Supervisor name: Hadi T. Ziboon
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

نظام السيطرة الذكي الاصطناعي المستند على تقنية الذراع الالي == Artificial Intelligent Control System Based on Robotic Arm Technology

Author name: احلام نجم عبد الامير
Supervisor name: حنان عبد الرضا عكار
Specific topic: Electronic Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تصميم هوائي جزيئي ذو نطاق ترددي فائق الاتساع == Design of Ultra Wideband Fractal Antenna

Author name: احسان محمد حسین عباس
Supervisor name: جمال محمد رسول
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

نظام تشفير الصورة المستند على مصفوفة بوابات المجال المبرمجة باستخدام الانظمة الفوضوية == FPGA Based Image Encryption Using Chaotic Systems

Author name: اثير جبار منصور
Supervisor name: حكمت نجم عبد الله | هادي طارش زبون
Specific topic: Electronic Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تقييم اداء انظمة الاتصالات اللاسلكية للمركبات == Evaluation Performance of Wireless Vehicular Communication Systems

Author name: اباء عبد الزهرة جعفر
Supervisor name: اشواق قاسم حميد
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

مرشح حجب متعدد الحزم مبني على اساس الهندسة الجزيئية == Fractal based multi-band reject filter

Author name: حيدر صلاح احمد
Supervisor name: جواد كاظم علي | علي جبار سالم
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم مرشحات امرار حزمة BPFs مصغرة بتقنية دليل الموجة المطبوع SIW لاغراض التطبيقات اللاسلكية == Design of Compact Substrate Integrated Waveguide (SIW) Band Pass Filters (BPFs) for Wireless Applications

Author name: اية نبيل عبد الزهراء
Supervisor name: علي جبار سالم
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

شبكة كشف الاعطال الذكية لخلية الوقود الهيدروجينية ذات غشاء التبادل البروتوني بالاستفادة من مصفوفة البوابات المنطقية القابلة للبرمجة == Intelligent Fault Detection Network for Proton Exchange Membrane Fuel Cell Systems Utilizing FPGA

Author name: حسين محسن هادي
Supervisor name: عباس حسين عيسى
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

سيطرة تفاوت الخطا لتوربينات الرياح المستدامة == Fault Tolerant Control Based Sustainable Wind Turbine

Author name: اسعد عبد الباري كريدي
Supervisor name: منتظر سامي شاكر
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

كشف وعزل اعطال المتحسسات المستندة الى الذكاء الاصطناعي باستخدام خوارزمية افضلية الحشد الجزيئي == Fault Detection and Isolation SensorBased on Artificial Intelligent Using Particle Swarm Optimization

Author name: علي حسين مجيد
Supervisor name: عباس حسين عيسى
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم مسيطر بالاعتماد على التمثيل المعكوس == Design Controller Based on an Inverse Identification

Author name: احمد شاكر عبد الله
Supervisor name: ميثاق نعمة رحيمه
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ مقياس طاقة ذات الدفع المسبق والمدعم بتقنية GSM == Design and Implementation of Prepaid Energy Meter Supported by GSM Network

Author name: مصطفى عبد العريس جبر
Supervisor name: اياد ابراهيم عباس
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ هوائيات شريطية دقيقة مبنية بتقنية دليل الموجة المطبوع SIW لانظمة الاتصالات اللاسلكية == Design and Implementation of Microstrip Antenna Based on SIW Technology for Wireless Communication

Author name: مروج عبد العظيم
Supervisor name: علي جبار سالم
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ وتقييم الاداء لمنظومة الاتصالات البصرية اللاسلكية لنقل معدل البيانات العالية العاملة بتقنية RFoFSO - MIMO == Design, Implementation and Performance Evaluation for High Data Rate Wireless Optical Communication System by Using (RoFSO – MIMO

Author name: قناة مهدي عبد الحسين
Supervisor name: علاء حسين علي | شهاب كاظم احمد
Specific topic: Electronic Engineering
Degree: Doctorate
Language: English
University location: Baghdad
First pages:

تصميم وتنفيذ قناة المتكيفة لنظام الاتصالات المتنقلة باستخدام مصفوفة البوابات المنطقية المبرمجة == Design and Implementation of Adaptive Channel for M - ary Mobile Communication System Using FPGA

Author name: وسن سمير رشيد
Supervisor name: هادي طارش زبون
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم و تصنيع هوائي شقي من النوع الجزئي لتطبيقات الاتصالات اللاسلكيه ثنائية النطاق الترددي == Design and Fabrication of Printed Fractal Slot Antennas for Dual - band Communication Applications

Author name: سيفان فهمي عبد الكريم
Supervisor name: جواد كاظم علي
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

دراسة وتحليل الاظمحلال في قناة النظام الخلوي GSM == A study and analysis of fading in GSM mobile channel

Author name: علاء عدنان سليم
Supervisor name: عايد خلف السامرائي
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:

تصميم ترميز تحويل لوبي في القنوات الاسلكية == Design of Luby Transform Code Over Wireless Channel

Author name: نبيل احمد مصدق
Supervisor name: وائل عبد الحسن هادي
Specific topic: Communications Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: ترميز التحويل لوبي) هو نوع من الترميز النافوري يعمل بدون اي معلومات عن القناة. في هذا العمل، تم تصميم LT code)) باستخدام ماتلاب، التصميم يتكون من ثلاثة اجزاء ( Encoder ,Decoder, channel ). في الجزء الخاص بتصميم الـ (Channel ) استخدمنا (( flat fading ch | Luby transform code (LT Code) is a type of fountain codes operating without any information about channel. In this work, LT code design of LT code implemented by using Mat lab as simulation software, our design consists of three parts (encoder, channel and decoder). In the channel design, flat fading channel will be used as a noisy channel to measure the performance of LT code over this type of channels. From the result obtained, SNR improvement by (30dB) at (BER=?10?^( - 4)) compared with data effect by the fading channel without coding with BPSK modulation model under different values of degree of distribution (d). Other type of modulation model (QPSK) used to measure the effect of changing the modulation type on the code performance. From the results obtained, SNR improvement by (31dB) at (BER=?10?^( - 4)) compared with data effect by the fading channel without coding. The degree of distribution (d) is a critical point of design, two types of distribution presented in this work, robust soliton distribution (RSD) and ideal soliton distribution (ISD). (ISD) works poorly in practice, (RSD) is a practical way used to get the degree of distribution in design by adding two extra parameters (c and ? ) which provide the spike element (k/R) in high degree distribution to ensure the continued of decoding process. As a result obtained the value of (c) has a major effect on the spike position on high degree (c=0.15,k/R=10 and c=0.2,k/R=7) with selective value of ?=0.5.The successful decoding probability for two types of degree distribution is very important, the value of successful decoding probability for (ISD) for low number of encoding packets (50 - 100) packet is greater than the value of successful decoding probability for (RSD). In the high number of encoding packets (>150) the value of successful decoding probability for (RSD) is greater than the value of successful decoding probability for (ISD).Encoding time for two type of distribution also discussed in this work, based on the results obtained the encoding packets time when using (RSD) is less than the encoding packets time when using (ISD).

تصميم وتنفيذ رادار تضمين التردد ذو الموجة المستمرة لنظام السرعة التكيفي للسيارات == Design And Implementation of Frequency Modulation Continuous Wave Radar For Adaptive Cruise Control of Car Applications

Author name: تمارا زهير فاضل
Supervisor name: منال حمادي جاسم
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: The traffic accidents became significantly obsession and concern for all members of society, and has become one of the most important problems that sap physical, human resources and human potential. The researches show that the damaged property and other costs may equal 3% of world’s gross domestic product, which have been required to work in finding solutions and suggestions and put them into practice to reduce these incidents.The insertion of preventive safety applications into the car system can avoid the above mistakes. In this work, a design and implementation of Frequency Modulation Continuous Wave (FMCW) radar system working at 77GHz for Adaptive Cruise Control (ACC) technology is proposed. Using MATLAB R 2013 which is a flexible system to estimate the speed and distance in accordance to vehicle ahead, which reduces the forces on the rate of accidents by warning the driver when two vehicle become too close.Also, the principle of FMCW radar is presented to generate Linear Frequency Modulated Continuous Wave (LFMCW) sweep waveform through frequency bands with triangular frequency modulation using Voltage Control Oscillator (VCO), a triangle sweep pattern adopt will resolve ambiguity without Doppler processing. which improves the decision making before hardware implementation.Proteus Professional v8 and Micro C PRO v 6.1 compiler is used for Peripheral Interface Controller (PIC) to design a proposed collision warning circuit with PIC16F887 and RS_232 serial port to send data using USART terminal for (short, middle, large) test range.A serial communication interface is used for sending the simulation results from MATLAB FMCW radar system to hardware easy PIC v7 board with PIC16F887 to forward collision warning circuit to alerts the driver of collision risk, Liquid Crystal Display (LCD) shows radar status (short, middle, large) in accordance to range between the vehicle that FMCW radar installed and the vehicle ahead.Graphic Liquid Crystal Display (GLCD) shows the car position and road lines. Piezo Buzzer will start singing to alerts the driver from danger road.The simulation design is achieving the desired performance, one parameter warrants further attention. In the FMCW configuration, the sweep time is about 25 microseconds. Therefore, the system needs to sweep a 140 MHz band within a very short period. Such an automotive radar may able to meet the cost requirement.

تقييم اداء الكشف المباشر والمتشاكه في نظام اتصال الليفة الضوئية == Performance Evaluation of Direct And Coherent Detections In Optical Fiber Communication System

Author name: علاء عبد الزهرة جعفر
Supervisor name: علي يوسف فتاح
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: تطورت خدمات الاتصالات بشكل متسارع في السنوات القليلة الماضية خصوصا في المسافات بعيدة المدى وبمعدل نقل البيانات بدقة عالية وخسائر قليلة في جميع انحاء العالم. وقدمت تقنيات مختلفة لزيادة سعة الارسال في انظمة اتصالات الالياف الضوئية بواسطة جمع مسارات البيانا | In recent years, there has been an extensive development of optical fiber services. They provide transmission over long distances at a high data rate with few losses all over the world. Different techniques have been introduced to increase the transmission capacity of optical fiber communication systems by a multiplexed high data rate stream into an optical fiber such as Dense Wavelength Division Multiplying (DWDM) technique. Since the deployment of DWDM technique, the focus on introducing large system capacity with high system performance, different detection techniques have been introduced to enhance the system performance with high sensitivity. In this work, two types of detection techniques (direct and coherent detection) have been evaluated and compared with each other. These detection techniques have been evaluated based on several models of encoding format such as Return to Zero - Differential Phase Shift Keying (RZ - DPSK) and Non Return to Zero - Differential Phase Shift Keying (NRZ - DPSK) at 10 Gb/s as a data rate.These systems were first simulated with a single channel to analyze the performance with no Stimulated Raman Scattering (SRS), Cross Phase Modulation (XPM) and Four Wave Mixing (FWM) effects. Whereby the system of 8×10 Gb/s is simulated at 200 GHz, 100 GHz and 50 GHz as channel spacing. Three types of dispersion compensation schemes are used in the link channel. These systems are simulated using (Optisystem version 10.0) software package. The performance of the designed systems are evaluated through Q.factor verses input power and Bit Error Rate (BER) verses Signal to Noise Ratio (SNR).The polarization interleaving is used with the WDM systems to decrease the nonlinear effects and the crosstalk arising among the adjacent channels.The obtained results of the 67% RZ - DPSK arrived to the threshold power at input power less than of the 50% RZ - DPSK, as well as the 50% RZ - DPSK system arrived to maximum Q.factor lower than 33% RZ - DPSK. This is due to the pulse duration of 33% RZ - DPSK is smaller than of 50% and 67% RZ - DPSK.The results show that the coherent detection technique has better performance than the direct detection technique. The coherent detection technique has Q.factor equal to 45, while the direct detection has Q.factor equal to 27 at the same input power ( - 5dBm), while the coherent detection technique arrived to the threshold power at the input power less than of the direct detection technique.The BER of the 33% RZ - DPSK with coherent detection with 10 Gb/s at 300 km as transmission distance achieved ?10?^( - 12.9) at SNR of 10 dB, while for the 33% RZ - DPSK with direct detection is achieved a BER of ?10?^( - 8.8) with SNR of 10 dB.The performance of the proposed systems has been improved extrusivly with increase the space channel, where the performance of the systems at 200 MHz as channel spacing has best performance than 50 MHz as channel spacing.By adapting coherent detection with 33% RZ - DPSK technique of 200 MHz as channel spacing, DWDM system can carry high data rate with long - haul transmission distance.

الشبكات المتعلمة الرقمية متعددة الاصناف المحورة لاغراض فحص كريات الدم الحمراء == Modified Multi - Category Digital Learning Network For Red Blood Cell Inspection

Author name: سهاد قاسم غلام حسين حداد
Supervisor name: محمود حمزة المفرجي
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
Key words:
  • Pattern Recognition
  • RAM - based Weightless Neural Network
First pages:
Abstract: A pattern recognition system based on the n - tuple technique is developed and evaluated for use in classifying non - deterministic data with particular reference to medical image. The pattern recognition system presented in this work fulfills the requirements of simplicity and efficiency making it attractive to practical use in present day for industrial and medical environments. It is an effective solution for providing healthcare with reduced cost, especially for the rural areas and far away patients. Ordinary doctors (not specialist in blood diseases), will be able to perform extra - ordinary tasks.In this work Digital Learning Network has been designed for classification of different shapes of abnormal Red Blood Cells. Digital Learning Network is of low cost hardware and implementation, and one shot learning, using networks of RAMs. Many parameters have been investigated in details which affect the recognition rate. These parameters are presented to allow the system to be optimized, giving an increase in the performance of the system. Modification method of Feedback Digital Learning Network, which is an improving process of Digital Learning Network, has been implemented. The obtained results show that high performance (96.6%) can be achieved, providing evidence of the validity of the proposed technique.

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

Author name: نور احمد سلمان
Supervisor name: ثائرة زكريا الطيار
Specific topic: Electronic Engineering
Degree: Master
Language: English
University location: Baghdad
First pages:
Abstract: 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.
1 2 3 4 5 6 ... 8