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عملية التعلم المنظمي واثرها في الابداع المنظمي : دراسة استطلاعية في كليات الصيدلة ببغداد == The process of Organizational Learning and its effect on Innovation: an servoy Study in colleges of pharmacy in Baghdad

اسم المؤلف: بشرى عباس محمد
اسم المشرف: صلاح عبد القادر النعيمي
الموضوع العام: الادارة والاقتصاد
السنة: 2007
الموضوع الدقيق: ادارة اعمال
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

تحليل المقدرة التنافسية للدولة في اطار تقييم مشاريع البنك الدولي في العراق بعد عام 2003 == National competitiveness analysis within a Framework Of the evaluation of world bank projects in Iraq after 2003

اسم المؤلف: اثیر عبد الخالق محمد صالح الجبوري
اسم المشرف: ھناء عبد الغفار حمود السامرائي
الموضوع العام: الادارة والاقتصاد
السنة: 2017
الموضوع الدقيق: الاقتصاد
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

تقييم تجربة الاجنحة الخاصة في المستشفيات العراقية : دراسة مقارنة

اسم المؤلف: ازهار ذياب عبد النبي
الموضوع العام: الادارة والاقتصاد
السنة: 2010
الموضوع الدقيق: الاقتصاد
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:

الانفتاح الاقتصادي وتاثيراته على التنمية في الاردن == The Economic openness and its effects on Development in Jordan

اسم المؤلف: عبد الله جميل النصيرات
الموضوع العام: الادارة والاقتصاد
السنة: 2002
الموضوع الدقيق: الاقتصاد
الدرجة: دكتوراه
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The current international system has faced and from the beginning of the nineties decade of the last century, a wide range of structural changes. Which have enlarged in speed and generalization, which have caused radical changes over most of the economical variables which have affected the economical and social situations for all the countries, of the most prominent events in the world from economical developments and which have evolved from different economical and political events arising from its period or getting its roots from the past, are the fall of the previous Soviet union, followed by the changes in eastern Europe, and the scientific different types of living ways ,and the increased role of global economic establishments in controlling the new economical system ,and the emergency of economical collections and regional intents between the different countries .These enormous developments have created a new environment for the economic international relationships, so the developed and developing world have become in the face of an economical theory of (almost unified economical policies with a difference in details, and it is the western economical theory which depends upon the economy and competence market. and increment of the private sector role, and diminishing the role of government, and the developing countries have raced to hold and implement those economical ideas and which are represented by the international and economical opening and limitation of commerce ,and increment of the foreign utilization role, and privatization of the general sector And because the developing countries are facing so many of economical problems, which is represented by the foreign debt and their bearings, and the failure of general offset ,and the failure in payment's offsets ,and the import in flation, and the dominance of foreign investments over most of economies of these states, so the idea of following the economical opening policy have occupied a big concern in developing states in the mean time .so many believe in this policy the curing medicine as the only solution to achieve economical and social development and after the failure of many development strategies .What is applicable to developing countries is so upon Jordan, so Jordan have found that the general interest necessitates going along with the changes and coping with the attitude towards opening and globalization rather than isolation, as being universal global attitudes, so it chose the policy" of universal economical policy as the only solution to achieve the economical and social development.It is important to mention that Jordan has faced in 1988 a shocking economical crises which made him unable to continue its developmental path, and,, paying its foreign debts or serving its bearings ,which have created too many difficulties ,the first of which is getting help from the international monetary fund to reschedule its debts and getting more of it ,and the second to lower the Jordanian Dinner value and the cash instability and the third is to adhere to the prescription of international monetary fund to rebuild the economy ,from here, so a lot of the procedures and legislation’s which are approved by Jordan within the structural adjustment programs, which were done with a previous preparation with the international institutes which were seeing that implementing these policies and procedures is necessary to have a maintained economical development, in addition to its interest in merging Jordan into the international economy through encouraging the policy of universal economic openness. The main objective of the study is to show the extent of economic openness in Jordan to specify the effects of this openness on Jordanian development.Result for studied years (1980 - 2000) showed Jordanian economy is open widely abroad, the rate of its economic openness is (72.5%), and the rate of imports to the gross national product (56.1%). Financial indicators showed that Jordan depends exclusively on abroad in financing the deficit in public budget and balance of payment. Rate of abroad general credit to gross national product (129.2%), and rate of remittance without charge (26.5%).This policy had bad effects on Jordanian Economy materialized in decreasing of national income and the individual's share it and aggravation of unemployment and poverty, The present work showed that population rate under extreme poverty line is (26%) during 1998, and (4.5%) of population is under thorough poverty. Unemployment compromised (27.5%) of the total labor according to non¬ - governmental data.If the policy behind the economic openness is to attract foreign investment, these investments constituted only low rate of (40.4%) out of total investments. The major part of this investments are Arabic investments which were focused on service sector to gain fast revenues with low risks that led to the expansion of this sector at the expense of other economic sectors.The study ends up with recommendations including dependence on the self, the optimum use of national resources, decreasing the dependence on capitalists and thorough economic openness orientation to Arabic nations

Application of Approaches of Mass Customization and its effect Competitive Advantages An Analytical Study for Wassit state Company for Textile Industries - Kut Factory

اسم المؤلف: حامد كاظم معن
اسم المشرف: احمد عبد اسماعيل الصفار
الموضوع العام: الادارة والاقتصاد
السنة: 2013
الموضوع الدقيق: ادارة اعمال
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Describe mass customization system as the main of excellence and achieve sustainable competitive advantage and high profitability, also research based on the idea of substantial that the constant change in the needs and desires of customers divers mean intensification of the conflict in the field of competition in the business environment , which generates pressure on companies led to inevitability of the adoption of new technologies and new trends in production , represented by (mass customization system ) in order to achieve competitive advantage thereby increase profits the research was based on two variables interact with each other to form the frame of mind to him , are (mass customization approaches as the depended variable, the research initiate of problem expressed introduced a number of questions aimed at answering her knowledge of the theoretical aspects of these variables being one of the modern application topics , and then diagnosed effect adoption of mass customization in achieving competitive advantage in the wassit state company for textile industries / knitting factory and because of importance of these approaches and the need for adoption at the factory , which achieve thus competitive advantage . The study chapters include theoretical coverage of problem , the researcher depended on information in the literature of subject and accumulated knowledge in this area . As the research include applied aside based on key assumption and sub assumption specialized department including diagnosis of correlation between the mass customization approaches and competitive advantage , while the other section diagnosise singled relationship with the impact of the application of those approaches to achieve competitive advantage. Wassit state company for textile industries - knitting factory was chosen as a site to conduct research and researcher used variant statistical tools of analysis and processing of data and information using statistical system( spss).The research style was a prospective study - analytical being comprehensive analysis style and deep for problem. The researcher reach to the fact that the existence of relations correlation effect between the variables , and researcher presented a set of recommendation s that serv the factory , as if they were taking them based on the conclustions that have been reached , it was most notably the need to adopt factory mass customization a pproaches and need to take to achieve competitive advantage

تطبيقات النظم الخبيرة وتاثيراتها في الرقابة الداخلية : دراسة ميدانية في البنك المركزي العراقي وبعض المصارف العراقية == Expert systems applications and their impact on internal control - Field study for Central Bank of Iraq and some Iraqi banks

اسم المؤلف: نور علي راضي
اسم المشرف: سلوان حافظ حميد
الموضوع العام: الادارة والاقتصاد
السنة: 2017
الموضوع الدقيق: المحاسبة
الدرجة: ماجستير
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يهدف البحث للتعرف على النظم الخبيرة التي تستخدمها المصارف المسجلة في سوق العراق للاوراق المالية وتسليط الضوء على دور تلك النظم لاسيما (نظام المدفوعات الالكتروني ونظام تبادل المعلومات الائتمانية) وتاثير تلك النظم في ضوابط الرقابة الداخلية لعينة من المصارف العراقية المسجلة في سوق العراق للاوراق المالية وتم اجراء دراسة ميدانية على البنك المركزي العراقي وبعض المصارف التجارية المسجلة في سوق العراق للاوراق المالية وهي (مصرف الخليج التجاري، والمصرف المتحد للاستثمار، والمصرف الزراعي التعاوني ) ، وتم تحليل ضوابط الرقابة الداخلية على مكونات النظم الخبيرة التي تستخدمها تلك المصارف واقتراح عدد من الضوابط على وفق الاطر والادلة والارشادات الدولية التي تعنى بضوابط الرقابة الداخلية في ظل استخدام تكنولوجيا المعلومات فضلا عن النظم الخبيرة ، لمعالجة نقاط الضعف في الاجراءات الرقابية على تلك النظم للمصارف عينة البحث ، ولاختبار تلك الضوابط المقترحة فقد استخدمت الاستبانة لغرض تحقيق هدف البحث وايجاد العلاقة وقياس مقدار تاثير استخدام النظم الخبيرة في ضوابط الرقابة الداخلية وتم ادخال وتشغيل البيانات ومعالجتها اليا باستخدام نماذج احصائية لتحليل النتائج واختبار الفرضيات .وتوصلت الباحثة الى ان هناك علاقة ارتباط بين نظامي المدفوعات ونظام تبادل المعلومات الائتمانية وان استخدامهما ( استخدام النظم الخبيرة ) يؤثر وبنسبة ضئيلة في ضوابط الرقابة الداخلية على كافة مكونات النظام وبنسبة تتراوح بين 5 - 18% .لذا تستطيع المصارف ان تعمل على تطوير نظمهواتحديثها باستمرار لاسيما ضوابط الرقابة الداخلية وذلك بالاعتماد على الاطر والارشادات الدولية التي توضح ضوابط الرقابة الداخلية التي يمكن اعتمادها في ظل استخدامها للنظم الخبيرة او يمكن تطبيق برنامج التدقيق المستند الى المخاطر . | The aim of study is to identify the concepts of expert systems as a kind of artificial intelligence applications, which is a new and wide use, especially in banks, as well as clarify the internal controls in light of database systems (and expert systems) and yours, according to in a statement the practice of statements and roles, and determine the use of this statement in the evaluation and improvement of internal controls and the impact of the use of these systems on the internal control department in a Central Bank of Iraq and some Iraqi banks (commercial Bank of the Gulf, and the United Bank for Investment, and Agricultural Cooperative Bank) through examination of the use of expert systems in those banks to determine their impact on the media and internal control procedures for banks and find out how you can develop and improve all internal control activities for those banks and compare in this sample of banks. To achieve this has been to rely on descriptive and analytical approach to books and research and scientific literature on the subject of study in the theoretical side, also adopted a researcher at the practical side on interviews with the competent authorities of the sample of research and analysis of regulatory reports and banking systems to see weaknesses in the regulatory actions on those electronic payment.The researcher found that there was a correlation between expert system(the payment and the credit information Exchange system) and that the use of had a small percentage of controls on all components of the system and a ratio of 5 - 18% .Banks must therefore continually develop their systems, especially internal control controls, relying on a risk - based audit programs

مركز النافذة الواحدة وتاثيرها في الاداء المكتبي : دراسة استطلاعية في دائرة جوازات ميسان == Single window center and its impact on desktop performance Exploratory study in the Department of Passports of Missan

اسم المؤلف: جعفر حسين نغيمش
اسم المشرف: فؤاد يوسف عبد الرحمن
الموضوع العام: الادارة والاقتصاد
السنة: 2018
الموضوع الدقيق: ادارة اعمال
الدرجة: دبلوم عالي
اللغة: العربية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يناقش الباحث متغيرين يتمثل الاول في مركز النافذة الواحدة والمتغير الثاني الاداء المكتبي اذ يعد نموذج النافذة الواحدة من الاتجاهات الحديثة الذي يستخدم لتقديم الخدمة من منفذ واحد او سقف واحد لتقليل الجهد للزبون والسرعة في اجراء المعاملات دون عناء يذكر.وقد حددت مشكلة البحث بعدد من التساؤلات كان اهمها تحديد مستوى العلاقة بين ابعاد النافذة الواحدة والاداء المكتبي واختبرت الدراسة في دائرة جوازات ميسان وقد تمت صياغة فرضيتين رئيستين تنبثق منها فرضيات فرعية وكانت الفرضية الرئيسة الاولى هل توجد علاقة ارتباط ذات دلالة معنوية بين النافذة الواحدة والاداء المكتبي, اما الفرضية الرئيسة الثانية فكانت هل يوجد تاثير ذو دلالة معنوية لمركز النافذة الواحدة في الاداء المكتبي .ولاختبار فرضيات الدراسة تم جمع البيانات من خلال استخدام استمارة الاستبانة بوصفها اداة رئيسة طرحت من خلالها ( 36) فقرة وزعت جميعها على مجتمع وعينة الدراسة والبالغة (47) منتسبا من موظفي دائرة الجوازات استخدم الباحث مقياس (ليكرت ) الخماسي فضلا عن تحليل البيانات باستخدام مجموعة من الاساليب الوصفية والاحصائية وتم استخراج النتائج باستعمال برنامج ( spss) وقد افرزت النتائج والتحليلات الاحصائية وتوصل الباحث الى اهم النتائج هي( هناك ميل لدى دائرة الجوازات باهمية النافذة الواحدة لانها تساهم في وضع افراد المجتمع امام مسئولياتهم وعدم التساهل امام المحسوبية وكافة اشكال الفساد الاداري والمالي) وكذلك يوصي الباحث باهم التوصيات منها( استخدام ابعاد النافذة الواحدة والعمل على تفعيلها في الدائرة المبحوثة بشكل صحيح بعد ان تبين ان هناك علاقة ارتباط في الاداء المكتبي وهذا يؤدي تقديم خدمة جيدة للزبائن) | The study aims at testing and measuring the impact of the single - window center on the performance of The office. The single - window model is considered one of the modern tendencies used to provide the services via one single ceiling, or one single outlet, so as to reduce the effort exerted by the customers, and to accelerate the performance of motions with the least possible effort. The problem of the study is limited to a set of questions at the top of which is the level of relation between the dimensions of the single - window and the offices performance. The study selected Missan Governorate Passport Directorate. Two major hypotheses were formed form which several minor hypotheses arise.The first major assumption is : Was there any significant correlation between the single window and the office performance? As for the second assumption, it is : Was ther a significant impact for the single - window and the office performance?In order to verify the hypotheses of the study, data was collected by means of a questionnaire form as being a main tool which contained 36 items distributed on the study population and sample which included 47 staffer from the personnel of the passports Office. The researcher used the five - dimensional Likert scale, in addition to the analysis of the data using a set of descriptive and Statistical methods. Results are deduced by using 'SPSS' program. Results and analyzsis were reached at and the researcher concluded that : "There is a statisticslly significant correlation between the independent variable of the single - window center and the variable of the office performance

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

اسم المؤلف: هويدا كمال عبد الفتاح
اسم المشرف: عضيد حسن سلومي
السنة: 2016
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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

اسم المؤلف: نهلة ظاهر حبيب بهية
اسم المشرف: منذر نعمان التكريتي
السنة: 2004
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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

اسم المؤلف: منتظر كاظم عبد الله
اسم المشرف: تركي كحيوش حسن
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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

اسم المؤلف: مصطفى عباس فضل
اسم المشرف: تركي كحیوش حسن
السنة: 2016
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: 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.

تحقيق دائرة المعدل الثابت للانذار الكاذب باستعمال منظومة البوابات المنطقية المبرمجة موقعيا == Modified GO - CFAR Implementaion Using FPGA

اسم المؤلف: مصطفى صبحي كمال
اسم المشرف: رفعت طالب حسين | حكمت نجم عبد الله
السنة: 2006
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: هذه الاطروحة تتعلق بتحليل ومعالجة تاثير الضوضاء المحيطية (Clutter) لمنظومة الرادار النبضي، يتطلب رادار الكشف الالي للهدف استعمال عتبة الية (Adaptive threshold) لتحقيق معدل ثابت للانذار الكاذب وذلك لغرض السيطرة على الانذار الكاذب الذي تسببه تغيرات في الضوض | This thesis deals with the analysis and processing of clutter for pulsed radar system. Automatic target detection radar requires adaptive thresholding achieved by Constant False Alarm Rate (CFAR) circuit in order to control the false alarm caused by variations in clutter background.This work focus on worst radar environment that happens when abrupt variation in clutter background merged with multi - interfering target, to detect target in such environments it need robust CFAR algorithm that excise the target spikes and clutter edges from CFAR window in order to give best possible estimation to the noise background. two important algorithms studied which are CA - CFAR and OS - CFAR algorithms in additional to the modified CA - CFAR algorithm. All these algorithms were simulated with mat lab v6.1 and applied them to three different clutter models that represent different environment cases the CA - CFAR family failed to handle model two and three also OS - CFAR family except OSGO - CFAR that handle all models successfully. For modified CA - CFAR family only modified GO - CFAR handle all models successfully and comparing with OSGO - CFAR the modified GO - CFAR need less hardware and processing time because it did not need sorting process that is essential for OSGO - CFAR. Therefore, the modified GO - CFAR is chosen to implement by using FPGA and another important feature in modified GO - CFAR algorithm that is parallel processing since the spike selection process is done at the same time with summing of samples process that make this algorithm much less in processing time from any other algorithm that work in the same environment. The FPGA chip that used to implement modified GO - CFAR algorithm need only three signals from the radar receiver to mach with the receiver circuit correctly which are time base clock signal period reset trigger signal and the pulse duration time. Therefore, the FPGA chip can work effectively with almost any radar receiver system

مسيطر السرعة المثالي بالاعتماد على المتجه المسيطر لمسوق محرك التيار المستمر عديم الفرش == Optimal Speed Controller Based On Vector Controlled For A Brushless DC Motor Drive

اسم المؤلف: مصطفى بشار عبد الملك
اسم المشرف: تركي كحيوش حسن
السنة: 2016
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: اصبحت محركات التيار المستمر عديمة الفرش شائعة جدا في الكثير من المجالات مثل في الصناعة والتطبيقات المنزلية؛ وذلك يعود الى مميزاتها العديدة على محركات التيار المستمر ذوات الفرش والمحركات الحثية؛ مثل كفائتها العالية, كثافة قدرتها العالية وحجمها الصغيرنسب | Brushless DC (BLDC) motors have become very popular in various fields such as in industry or home appliances; and that is due to their many advantages over the brushed DC motors and the induction motors such as their higher efficiency, high power density and respectively low volume. The traditional and most popular way to drive BLDC motor is by using six - step or trapezoidal technique. This technique however has several problems such as high torque ripple and high distortion in the currents. This thesis presents a BLDC motor drive system where the performance of the motor is improved on various aspects. The first aspect is to improve the speed response by using particle swarm optimization (PSO) technique to find the optimal parameters of the speed controller. The second aspect is to reduce the torque ripple associated with the traditional driving technique and also improve the dynamic response of the motor by using vector or field - oriented control to drive the motor. The third aspect is improving the total harmonic distortion (THD) of the voltages and currents by using multilevel inverter. The last aspect is driving the motor in sensorless operation for reduced cost and for applications where speed and position sensors cannot be used; this operation uses a flux - linkage observer with a phase - locked loop (PLL) structure to estimate the position and speed of the rotor. The control methods are modeled using MATLAB/Simulink program and the results show that the proposed systems has significant improvement in performance as compared with the traditional technique in terms of speed response, torque ripple and THD of the voltages and currents

التاثيرات الكهربائية والبصرية لتشويب اغشية اوكسيد الخارصين (ZnO) المكونة لمتحسس الاشعة فوق البنفسجية بالفضة == Electrical And Optical Effects Of Ag Doped ZnO Thin Film Based MSM UV Photodetectors

اسم المؤلف: محمد وسام ناجي
اسم المشرف: منير عبود هاشم | غصون محسن علي
السنة: 2015
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: يستخدم اوكسيد الخارصين (ZnO) لكشف الاشعة فوق البنفسجية وذلك لكبر فجوة الطاقة وكبر طاقة اثارة الربط لهذا الشبه موصل. اوكسيد الخارصين كذلك يمتلك سرعة اشباع عالية وفولتية انهيار عالية. في هذا العمل تم تصنيع متحسس اشعة فوق بنفسجية نوع (معدن - شبه موصل - معدن) با | Zinc Oxide (ZnO) has been commonly used for ultraviolet detection due to large band gap and excition binding energy. ZnO has high breakdown electrical field, also has a much larger saturation velocity. In this work three ultraviolet Metal Semiconductor Metal (MSM) photodetectors were fabricated, based on ZnO and Silver (Ag) doped Zinc Oxide (SZO) with (2% and 4 % doping ratios) thin films. The technique used to prepare the thin films was sol - gel and spin coating technique by using Si (100) p - type. Silver interdigitated (IDT) electrodes were deposited on the films by a vacuum coating deposition technique to form the three devices.The electrical properties for the fabricated photodetectors (PDs) were studied using Semiconductor Characterization System (SCS) at room temperature ( 27 C^o). The applied voltage was in the range of ( - 5 to 5) V.The SEM images showed a non - uniform distribution of the Ag dopants, these dopants formed clusters and these clusters increased as the amount of Ag dopants increased. The mobility, carrier concentration, and roughness for the SZO films increased when compared to undoped film. The optical bandgap and the transmittance are decreased when the doping ratio is increased. The saturation current (I - S) was decreased by a factor of 4, and 12 for the devices based on Ag doped ZnO (with 2% and 4 % doping ratios) thin films, respectively. The sensitivity was significantly increased with increasing the doping ratio. This enhancement attributed to the roughness of the Ag dopants (clusters). The detectivity was increased for the devices based on SZO films. The high detectivity with low saturation current made the devices based on SZO films suitable for optoelectronic applications and integrated circuits. From the experimental data and analysis, it was found that the PD with ZnO : Ag 4 % doping ratio has higher responsivity and gain of 0.523 A/W and 257 , respectively. This is confirmed by thin film and device characterization which makes this PD suitable for UV detection purposes.

النمذجة التحليلة لاداء الثنائي الضوئي p - i - n == Analytical Modeling Of A P - I - N Photodiode Performance

اسم المؤلف: محمد شهاب احمد
اسم المشرف: منیر عبود ھاشم
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The analysis of a silicon p - i - n photodiode with a uniform doping concentration in each layer is presented. The theoretical treatment aims at investigating the device operation and performance to obtain optimum values of photodiode parameters when operates as a photodetector.Large bandwidth, good responsivity, device speed and quantum efficiency at wavelength of interest, combined with its low operating voltage and capability, make this diode promising for optoelectronic receiver circuits for use in optical communication systems and computer interconnections.High speed silicon p - i - n photodiode which operate at 700 nm wavelength is reported. By using a reverse bias voltage to control electric field, a high quantum efficiency of 80% is attained corresponding to bandwidth of 6.5 GHz at depletion width of 5.36 ?m and biasing voltage of 27.5 V. The minimum detectable incident light signal power is 3.9 ?W corresponding to signal to noise ratio of 6.5*104. The results show that, there is trade - off between quantum efficiency and bandwidth. Since the intrinsic layer of a p - i - n photodiode can be made with a lightly doping concentration, a p - ? - n photodiode is also treated mathematically with a software tool, and the results obtained are very close to those for a p - i - n photodiode. The results are achieved with the aid of MATLAB programming tool version 8.1.0.604 (R2013a).

Design And Fpga Implementation Of Neural Network

اسم المؤلف: مثنى حاجم حمد العامري
الموضوع العام: هندسة السيطرة والنظم
السنة: 2004
الموضوع الدقيق: هندسة السيطرة والنظم
الدرجة: دكتوراه
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The use Artificial Neural Networks (ANN) can be a form of Artificial Intelligence (AI). The feedforward neural network has a wide application area such as pattern recognition, image compression, and classification problem. Two models of a feedforward neural network are proposed and implemented using the schematic editor of the Xilinx foundation series 2.1i. Model - 1 consists of two layers and specializes in solving linear problems. Depending on the type of application, the input layer can receive 2 to 126 input values ordered in 256x16bits RAMs. The connection weights are distributed over four 256x16bits RAMs where, the four RAMs exchange their active role in swapping operation. Model - 2 is a modified copy from Model - 1 and consists of three layers and it is responsible for classifying non - linear problems.The mathematical model of the data set (weights and inputs) is presented in a matrix multiplication format. Principle Component Analysis (PCA) is a modern method used to reduce patterns set dimensionality and hence speeds up the training phase iterations. Speeds up the training phase will eventually minimize the over all system execution time. Each model is designed and implemented in five stages without using the finite state machine. It controls the processes of the forward propagation phase, error calculation, and training algorithm. These processes are managed by many control circuits like, J - K synchronized circuit, sign - detector/sum - sub control circuit, and timers that takes the role of finite state machine. These five stages make the design easily to implemented and modified. Modification in the system parameters (No. of inputs, No. of outputs, or No. of layers) can be performed in the appropriate stage without reservation.The flexibility, low costly, and real - time operation are the main features of the proposed design. Model - 1 execution time is 2.935µs and model - 2 execution time is 2.96µs, while the costs of two models are 1927 and 2017 CLBs respectively.These features compare extremely well with other existing designs with good advantages.

تصميم وتنفيذ معالج باستخدام TM - CFAR مصفوفة البوابات المبرمجة FPGA == Design And Implementation Of TM - CFAR Processor Using Field Programmable Gate Array

اسم المؤلف: علي هادي عبد الواحد
اسم المشرف: وليد خالد عبد علي
السنة: 2006
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: This Thesis proposes on a project whose aim is to implement architectures for CFAR processor employed in radars. These proposed architectures are implemented by using Field Programmable Gate Array (FPGA) technique, with observance of feature desired as flexibility and speed without performance loss. This design written in VHDL Hardware Description Language that can be used to accelerate the implementation. In this thesis, the proposed by design is implemented using MATLAB Simulink on the Trimmed - mean Constant False Alarm Rate Processor(TM CFAR) to obtain system parameters and to test the flow of signal through the system, and then used FPGA devices. FPGA architecture of TM - CFAR processor is implemented to overcome the large processing time required in case of multi - target environment. The use of this technology is suitable because it offers high flexibility in modifying and even developing the required design with a reduction in the required number of hardware and cost. In addition to the main features of the processing chain architectures such as degree of parallelism, small size, accuracy and high computational speed, there is a requirement for generality and adaptively i.e. the ability to handle many different models of operation in different environments. The FPGA implementation of the design is achieved using Xilinx Virtex - II platform as a suitable selected programmable device. The development of the system software for this work has been done using Active HDL 3.5, and ISE Navigator 6.3i programs.

تمييز الاهداف الرادارية وذلك عن طريق استخدام الشبكات العصبية وافضلية الحشد الجزيئي == Radar Target Recognition Using Neural Network And Particle Swarm Optimization

اسم المؤلف: علي ناظم غالب
اسم المشرف: وليد خالد عبد علي
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: In the last decades, the pattern recognition and classification are taking an important area of the research. One of the main applications of pattern recognition is the radar target recognition which is vital in radar system.In this this work, a radar signal were used and analyzed for three targets present a contribution is this trend (aircrafts SR - 71, C - 130 and AH - 64), and used as initial data, then variations are made to simulate the target signal variation (50 range profile for each target).A wavelet transform (multi resolution decomposition) is used to reduce the dimensions of radar range profile and then leads to reduce storage and computation.The wavelet transform including two procedures, the first one using approximation and details coefficients as feature extraction, while second procedure use related with the details coefficient only.Artificial Neural Network (ANN) is used as recognizer. The Feed Forward Neural Network (FFNN) and Elman Recurrent Neural Network (ERNN) are used. The network was trained using Supervised Learning Algorithms. The FFNN was trained by (Levenberg - Marquardt (lm), Bayesian regulation (br), particle swarm optimization). The (ERNN) was trained by (lm, br).The best recognition rate of three targets is obtained by using the feature extraction from (normalized details wavelet coefficient) and the ERNN trained by (br). The recognition rate in this procedure is about 96% compare with other methods.When adding the AWGN S/N=5db, the recognition rate reducing to 85%.

تمييز الوجوه اعتمادا على التحويلات الكونتورية ومصنف الشبكة العصبية متعددة الطبقات == Face Identification Based On Contourlet Transform And Multi - Layer Neural Network Classifier

اسم المؤلف: علي فتاح حسون
اسم المشرف: ماهر خضير محمود
السنة: 2016
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Face recognition plays an important role in many applications like security, banking, access to buildings, and surveillance …. etc.Because of the face image can significantly change due to changing in some factors, such as lighting conditions, facial expression, and others factors, therefore face recognition is still a challenging mission. Useful properties of the Contourlet Transform (CT) are exploited in this thesis to investigate more discriminant features to enhance the face identification performance. In this thesis, a face identification system is suggested based on CT, and Multi - Layer Neural Network (MLNN) Classifier. The main reasons behind using the CT are : First, the CT supports progressive data compression/expansion, hence it is used for image compression. Second, the features in human face are not just horizontal or vertical. CT is utilized for feature extraction because it is a genuine 2D transform that can capture the edge information in all directions. After decomposing an image by CT, low and high frequency coefficients of CT are calculated in different scales and various angles. Most significant information of faces is contained in coefficients, which is important for face identification. The frequency coefficients are utilized as an input feature vector for a neural network classifier. Simple feed forward MLNN neural network is used to achieve the identification process. The network parameters are tuned to optimal values, in order to produce fair comparison between different types of feature vectors. To evaluate the algorithm performance, seven standard databases, and a proposed database are used. Some of them are of high variability, to examine the algorithm robustness against variability. In addition, the proposed algorithm is also evaluated using a generated database composed from five databases. Then the suggested method is compared with other classical feature - based methods such as, wavelet, Principle Component Analysis (PCA), and CT - PCA. The results indicate that the CT - based method has better identification (ID) rate, and is faster than the Wavelet - based and the PCA - based methods. This is due to the high sparsity of the CT and its efficient capability of compression. The ID rates obtained for a tested databases are Japanese Female Facial Expression (JAFFE) database (100%), face 94 database (99.34%), proposed database (98.55%), ORL database (96.5%), Senthil database (92%), Yale database (90%), FERET database (76.2 %), and FEI database (72.57 %), and comparing with other systems, an average identification rate 90.64% for the CT, 85.71% for the Wavelet, 53.92% for the CT - PCA, and 46.7% for the PCA for all tested databases.Moreover, the characteristics of low and high frequency sub bands a are studied with their effect on ID rates. The simulation results indicate that the best identification rates are obtained when using only the low frequency sub - band for all tested databases

استخدام اغشية اوكسيد الخارصين (ZnO) الرقيقة في متحسس لتركيز الهيدروجين من نوع ترانزستور تاثير المجال ممدود البوابة == Zinc Oxide Thin Films - Based Extended - Gate Field - Effect Transistor (EGFET) As Ph Sensor

اسم المؤلف: علي عزام عبد اللطيف
اسم المشرف: رعد حمدان ظاهر | غصون محسن علي
السنة: 2015
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: ظهر في السنوات الاخيرة اهتمام ملحوظ في استخدام متحسسات تركيز الهيدروجين (الرقم الهيدروجيني) من نوع ترانزستور تاثير المجال (FET) في التطبيقات الطبية الحيوية مثل دم الانسان, اليوريا واللعاب لان عملية تصنيع متحسسات تركيز الهيدروجين تتجه نحو التكلفة المنخفضة | In recent years, there is noteworthy interest in using pH - sensors based on Field Effect Transistor (FET) in biomedical applications such as human blood, urine, and saliva because the fabrication of pH - sensors is tending toward low cost, small size, disposable, and real - time measurement. In this work, Extended Gate Field - Effect Transistor (EGFET) pHsensors were built using thin films of Zinc Oxide (ZnO) doped with Palladium (Pd) as sensing membranes. The Pd - doped ZnO thin films with different molar concentrations (Pd = 0%, 2% and 4%) were deposited onto p - type Si(111) substrate by sol - gel method. The surface morphology of the prepared films was imaged and studied by Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM). The crystal structure of the fabricated films was examined by X - Ray Diffraction (XRD) test. The optical and electrical characteristics of the films were measured using spectrophotometer and Hall - Effect measurement device, respectively.The EGFET pH - sensor has been prepared by linking the fabricated sensing devices to the gate terminal of a commercial Metal - Oxide - Semiconductor Field - Effect Transistor (MOSFET CD4007UB).The fabricated sensing devices were immersed in buffer solutions with pH range of (pH 3 ? pH 11). The pH sensing characteristics of ZnO and Pd - ZnO/silicon EGFET devices were studied using Semiconductor Characterization System (SCS - Keithley 4200).The ZnO EGFET sensor exhibits voltage sensitivity and linearity of 31.5 mV/pH and 0.9809 (or 98.1%) in linear regime with pH range of (pH 3 - pH 11). The voltage sensitivity and linearity of Pd - doped ZnO (with 4% molar concentration of Pd) EGFET device in the linear regime with pH range of (pH 5 - pH 11) are 27.86 mV/pH and 0.9785 (or 97.85%), respectively. The experimental results show that the Pd - doped sensing films by sol - gel method cannot be adopted for whole pH range. This means that the doped films have fewer amounts of H+ ions sensing sites at its surface than undoped ZnO fims.

تحليل الاشارات المشفرة ثنائيا باستخدام الترشيح الموائم وغير الموائم لتقليل الفصوص الجانبية == Analysis Of Binary - Coded Signals Using Matched And Mismatched Filtering For Sidelobe Reduction

اسم المؤلف: صلاح حسن عباس
اسم المشرف: اسماعيل محمد جابر
السنة: 2009
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: Various types of binary phase - coded signals are studied in terms of their correlation properties. Then, matched filtering technique as well as mismatched filtering techniques is applied to the codes studied previously in order to reduce the sidelobes of the compressed binary phase - coded signal around the mainlobe, and consequently increase the detection of the received signal. Each filtering technique is performed using programs written by the programming language of MATLAB version 7.4.0.287 (R2007a). White Gaussian noise is introduced in the assessment made to both the filtering techniques and the codes that are adopted in this thesis.The MATLAB programs are tested on various types of binary phase codes that are adopted in this thesis to calculate the criteria to choose the best filtering technique. These criteria are peak sidelobe level, the integrated sidelobe level, and the signal - to - noise ratio loss. Later, the results, which are obtained according to these mentioned criteria, are used to test different filtering techniques on the chosen periodical and aperiodical binary phase codes to choose the best one.It is found that, the optimal peak sidelobe level (PSL) filtering technique is the best filtering technique for the aperiodical binary phase codes in terms of the peak sidelobe level, and in terms of an acceptable signal - to - noise ratio loss. The optimal integrated sidelobe level (ISL) filtering technique comes in the second place.While, it is found that, the mismatched filtering technique is the best filtering technique for the periodical binary phase codes in terms of an acceptable signal - to - noise ratio loss.

تصميم وتحليل هوائيات مغيرة الرقعة للتطبيقات ذات الحزمة العريضة == Design And Analysis Of Slotted Patch Antenna For Wideband Applications

اسم المؤلف: سيف ناظم غالب الساعدي
اسم المشرف: رعد حمدان ظاهر
السنة: 2016
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: The main objective of this work is to design, fabricate and test irregular, diamond wideband microstrip patch antenna which satisfy UWB. A series of parametric study is conducted to show how the characteristics of the antenna depend on the various geometrical and other parameters. These geometrical parameters of the antenna include the dimensions of the patch, feeder and ground plane. Slots are inserted different shapes and sizes in antennas to show which give different bandwidth. The first designed antenna has regular pentagonal patch and 50? microstrip line on one side of dielectric substrate and partial ground plane with square slot on other side. This antenna gives dual bandwidth 2.73 - 7.5 GHz and 8.7 - 20 GHz. This antenna is modified by changing the patch from regular to irregular pentagonal patch with the same area and fixe the other parameter of the antenna. Therefore, the antenna is improved in term of bandwidth and gain, which gives bandwidth of 2.74 - 20 GHz. Many slots with the different shape and size are added to the irregular pentagonal patch to modify this antenna, which makes this antenna have bandwidth of 2.6 - 20 GHz which is suitable for the application that operating in this band. The second design consists of diamond patch and microstrip feed line on one side of dielectric substrate and partial ground plane has square slot on the other side. This antenna is modified by adding three slots in the patch which modifies the gain, so this gives bandwidth of 2.3 - 18.5 GHz. The third design consists of irregular pentagonal patch that is fed by 50? Coplanar Waveguide (CPW) and 4 - step stair added to ground plane is printed on one side of dielectric substrate and c - shape independent piece on other side. This antenna gives bandwidth of 1.48 - 14.2 GHz which is suitable for the applications that operating in this bandwidth. The fourth antenna consist of diamond patch that fed by 50? Coplanar Waveguide (CPW) and 4 - step stair added to ground plane is printed on one side of dielectric substrate and independent piece on other side. This antenna is suitable for the applications which is operate in band of 1.35 - 16 GHz. The design and simulation of the antenna is carried out using CST microwave Studio simulation software.

محول خفض الفولتية المستمرة باستخدام المكثف المفتاحي == Switched - Capacitor Based Step - Down DC - DC Converter

اسم المؤلف: سؤدد زاحم حسين
اسم المشرف: تركي كحيوش حسن
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
المستخلص: المحـــــــــــول الخافـــــــــض للــــــــــــفولتيـــــــــة المستمرة ذو المكثف المفـــــــتاحــــــــي (Switched Capacitor DC - DC Converter ) يمكن ان يستعمل للتحويل الكفوء للطاقة حيث نجد انه عندما لا تستعمل المحاثات في دوائر التحويل يؤدي الى خفض حجم | Switched - capacitor (SC) - based step - down DC - DC converter can be used for efficient power conversion when inductors are not used in order to reduce size and cost. In addition, switched - capacitor DC - DC converters are superior to inductor - based converters for high - conversion ratio and wide range of load variation. In this thesis , a multistage current - controlled switched - capacitor step - down DC - DC converter is analyzed , designed and simulated. The converter features are of good regulation capability and continuous input current waveform when two step - down converter cells are connected in parallel and operate in antiphase. Classical SC converter with pulse width modulation technique is also analyzed, designed , simulated. For the PWM converter and current - controlled converter , third - order state - space averaging technique is used for analysis. A fuzzy logic controller is used with the current - controlled converter to obtain fast dynamic response, low ripple in the output voltage and robustness against load and supply variations. A 70W ,48/12V and 12.5W 48/5V converters are designed and simulated ( Matlab/Simulink is used for simulation). The simulation results are obtained and compared for the above converters with different control techniques (PWM ,current control with PI controller and current control with fuzzy controller). The results for current - controlled converters with fuzzy controller show higher efficiency , lower ripples in the output voltage ,fast transient response, good disturbance rejection and very small steady state error of output voltage. In this thesis the value of the output ripple must less than 0.05 V and the efficiency should be more than 75 % for current control mode

نظام الاخفاء الصوري المعتمد على تحويل المويجة والاشارات الفوضوية

اسم المؤلف: سرى فهمي يوسف
اسم المشرف: حكمت نجم عبد الله
السنة: 2014
الموضوع الدقيق: هندسة الكهرباء
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:

ترميز القناة المرتكز على الاشارات الفوضوية == Chaos Based Channel Coding

اسم المؤلف: سراب كمال محمود
اسم المشرف: حكمت نجم عبد الله
السنة: 2014
الدرجة: ماجستير
اللغة: الانكليزية
مكان الجامعة: بغداد
الصفحات الاولى:
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