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سید ابوالنظر رضوی

سید ابوالنظر رضوی
افسوس ہے ہمارے حمیم صمیم سید ابو النظر رضوی کا۸/اپریل کوکراچی میں انتقال ہوگیا۔موصوف امروہہ ضلع مراد آباد کے شرفا اورنامور رؤسا میں سے تھے، بلا کے ذہین اور طباع تھے۔درس نظامی کا بڑا حصہ مدرسہ امدادیہ مرادآباد میں پڑھا تھااورپھر آخر میں ایک سال دارالعلوم دیوبند میں رہ کر تکمیل کی تھی۔اردو کے صاحب طرزانشاء پرداز اورادیب تھے۔طبیعت میں روانی غضب کی تھی۔تقسیم سے پہلے برہان میں اُن کے مقالات اکثر نکلتے رہتے تھے۔اس کے علاوہ دوسرے ادبی اورعلمی رسالے بھی مرحوم کے مضامین فخر سے شایع کرتے تھے۔ ۱۹۴۸ء میں یکایک اپنی تمام جائیدادواملاک چھوڑ چھاڑ کرکرا چی چل دیے۔بڑی تمناؤں اورآرزؤں کولے کر گئے تھے لیکن ایک بھی پوری نہیں ہوئی اورہزاروں روپیہ ماہوار کاخرچ رکھنے والا وہاں عسرت وتنگدستی کاشکارہوکر رہنے لگا۔ان پیہم ناکامیوں اورمایوسیوں کانتیجہ یہ ہواکہ تپ دق میں مبتلا ہوگئے۔مرنے سے چندماہ پہلے ایک خط میں کس حسرت سے لکھتے ہیں:’’قدرت کے کارخانے بھی عجیب ہیں۔ جب میرے پاس ریاست تھی،دولت تھی اورطاقت تھی اس وقت مجھ کویہ موذی مرض نہ دیاکہ میں اس کامقابلہ کرسکتا تھا، اب اس غریب الوطنی اورتنگدستی میں مجھ کو اس بیماری میں مبتلا کرکے سوائے اس کے کہ قدرت’’گربہ و موش‘‘ کا تماشا دکھانا چاہے اورکیا فائدہ ہے؟‘‘
بعض خاص اسباب کی بناپر مذہبی خیالات میں عدم توازن پیداہوگیا تھا اور قرآن مجید میں بعض عجیب طرح کی تاویلات و توجیہات کرنے لگے تھے۔ یوں نہایت شریف، بامروت،دوست نواز،بے حد خلیق اورملنسار تھے۔مہماں نوازی بڑی عالی ظرفی سے کرتے تھے۔ اﷲ تعالیٰ اُن کی لغزشوں اورغلطیوں سے درگزر فرماکر ان کو مغفرت وبخشش کی نعمت سے نوازے۔آمین [مئی۱۹۵۶ء]

 

اسلامی نظام معاشرت میں عدل اجتماعی کی اطلاقی معاشی نوعیت

There is no doubt that the economic system of Islam is stable and compassionate which is based on "Human Amity." This system and its features are utterly beneficial for humanity irrespective of their caste, creed, reigion and religion etc. The specialities of social justice that are applied in the economic field provide such comprehensive and versatile version which makes the utility of the economic system even more pertinent. The humanity can adopt this system to ensure their well-being and welfare.  More importantly, as this system is based on economic justice rather equality, which means, it’s the natural system that depends on human capacities, efforts, innate necessities and abilities. The more a man strives, the more benefit he gets. However, it also sets out the principle of financing those who try hard but stay behind in the economic race. In addition, the fundamental philosophy of this system is to protect the economic rights of the society and provides resources to everyone for equitable economic struggle, with no discrimination. The economic systems around the world suffer from inflation and precariousness, while Social Justice proves to be a remedy to the said scenarios.

Analysis and Design of Neural Network Controller of Single Active Bridge Converter

The power electronic researchers and designers are involved since last two decades in designing converter topologies for their effective use in high power applications. Recently, developed SAB converter being an advanced topology is gaining popularity because of its many attractive features. Despite of its attractive characteristics and merits it faces a serious problem of the generation of oscillations. These oscillations create disturbances in the systems network and also badly affect the performance of the converter itself. Such topologies with conventional controllers are also produce power quality problems such as; variation in frequency, voltage dips and swells, which lead to interruptions and transients in system networks. As it is a well known fact, that SAB converter is a variable structure system due to its switching operation and contains nonlinearities. Because of the high switching speed of SAB converter, i.e. in nano seconds, it is difficult to control it with linear controllers. In previous research the Proportional plus Integral (PI) controllers were used which were unable to control the SAB converter under nonlinear situations and ultimately this will lead to undesired results. Considering the deleterious effects and limitations of the conventional controllers in this research the Neural Network based controller is designed to handle the non-linear situations. Neural Network Controller (NNC) is recently found various applications in power electronic converters because of its good dynamic behavior and robustness. Designing of the Neural Network Controller for SAB converter is the main contributions in this research work. The NNC type cascade controller for SAB converter is successfully developed in MATLAB. The performance of single active bridge topology with NNC is tested under steady state, transient and dynamic region by considering the, line, duty ratio and reference voltage variations. Simulation results show improvements in transients and reference variation in the range of 26% to 38% respectively and 6 time improvement in line variation and 30 time improvement in duty ratio variation. The designed controller after through analysis, testing and comparison with previous designed controllers depicts that the neural network based controller is quite effective, efficient and has good transient and steady-state properties. Keywords: DC/DC converters, Single-Active Bridge converter, Neural Network Controller, Feed Forward Neural Network.
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