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کوشا فایل بانک فایل ایران ، دانلود فایل و پروژهترجمه مقاله Optimal operation scheduling of wind power integrated with compressed air energy storage
اختصاصی از کوشا فایل ترجمه مقاله Optimal operation scheduling of wind power integrated with compressed air energy storage دانلود با لینک مستقیم و پرسرعت .
چکیده
این تحقیق درباره بهینه سازی و مقایسه عملکرد نیروگاه گازی مرسوم با ترکیب عملکرد آن با نیروگاه بادی و مخزن انرژی هوای فشرده است. فرمولاسیون برنامه ریزی غیر خطی ترکیبی عددی برای بهینه سازی مسئله بسط داده شده است.(MINLP)برای مدلسازی واحدهای مرسوم گازی، محدوده شیب نامی – ظرفیت آن و کمترین زمان روشن و خاموش شدن آن و محدودیت های راه اندازی آن مورد بررسی قرار گرفته شده است.در مدل سازی منبع هوای فشرده شده محدودیت های تولید و تزریق توان-مخزن فشار هوا،تعادل هوا و محدوده عملکرد CAES مورد بررسی قرار گرفته شده است.در این مقاله دو تابع هدف مدل سازی شده است(افزایش سود و کاهش هزینه ها).بدون بررسی هزینه های اولیه پیداست که نتایج استفاده از CAES دارای سودی بیشتر از 43 درصد بوده و در بازار کاهش هزینه ها در حدود 6.7 درصد خواهد بود.
کتاب Encyclopedia of Heart Diseases زبان اصلی
اختصاصی از کوشا فایل کتاب Encyclopedia of Heart Diseases زبان اصلی دانلود با لینک مستقیم و پرسرعت .
کتاب Encyclopedia of Heart Diseases زبان اصلی
The Encyclopedia of Heart Diseases is an accurate and reliable source of in-depth information on the diseases that kill more than 12 million individuals worldwide each year. In fact, cardiovascular diseases are more prevalent than the combined incidence of all forms of cancer, diabetes, asthma and leukemia. In one volume, this Encylopedia thoroughly covers these ailments and also includes in-depth analysis of less common and rare heart conditions to round out the volume's scope. Researchers, clinicians, and students alike will all find this resource an invaluable tool for quick reference before approaching the primary literature.
حجم فایل: 7 مگابایت
رساله دکتری با عنوان: Fracturing of layered reservoir rocks
اختصاصی از کوشا فایل رساله دکتری با عنوان: Fracturing of layered reservoir rocks دانلود با لینک مستقیم و پرسرعت .
رساله دکتری با عنوان: Fracturing of layered reservoir rocksدانشگاه : The University of Oklahoma
استاد راهنما: Dr. Ze’ev Reches
پژوهشگر: Seth Busetti
سال 2009
فرمت فایل: PDF و شامل 272 صفحه
چکیده:
The development of fractures in rock layers reflects a history of complex, non-linear, time-dependent mechanical processes. The processes strongly depend on the rock rheology, particularly the behavior during progressive deformation, layering effects such as the mechanical stratigraphy, and the local stress conditions. In the past, the complex mechanics associated with fracture initiation and propagation contributed to the application of simplified models based on linear rheology and using quasi-static solutions. While this approach is effective in solving infinitesimal strain problems, it provides no explanation for strain localization, damage accumulation and rock failure, and it oversimplifies fracture propagation. The objective of the present work is to contribute to the understanding of these processes.
The approach of this study is as follows. (Chapter 1) Theoretical advancements on fracturing and the concept of continuum damage mechanics are compared with rock mechanics experiments to understand progressive deformation, failure, and fracture propagation for rock. It is demonstrated that non-local (away from the crack-tip) yielding behavior must be considered to understand complex fracturing. (Chapter 2) A numerical rheology based on the elastic-plastic-damage properties of Berea sandstone is developed and calibrated to experimental rock mechanics data. A method for translating the stress-strain curve and acoustic emissions data into a material model included in the commercial finite element code Abaqus is presented. Two rock mechanics experiments are simulated in 3-D to test the rheology model. (Chapter 3) The rheology is implemented into finite element models based on classical hydraulic fracturing configurations. The explicit dynamic finite element method is used to simulate damage and transient propagation of a hydrofracture segment. It is shown that the complexity of fracturing depends on the local stress-strain response, which is controlled by the evolving damage pattern. The dynamical characteristics of arrest, rupture, branching, and segmentation of the fracture are described in terms of damage evolution. (Chapter 4) An analytical model for natural fracture reactivation is paired with the finite element simulations to understand the development of complex hydraulic fracture networks in the subsurface. The models' predictions are compared with data from hydraulically stimulated wells in the Barnett Shale. Recommendations are made for optimizing hydrofracture operations in wells for different states of stress (Chapter 5). The occurrence of zones of anomalously high fracture density is characterized in a carbonate sequence near Cedar Mountain Utah, and in Jackfork Group sandstone layers in Oklahoma and Arkansas. The results indicate that fracture density should be examined as a function of the evolving rock properties of the host layer in addition to the layer thickness.
The investigation contributes to understanding the process of damage and fracturing during the deformation of rock layers. The results describe the development of mechanical inhomogeneity in fractured rock layers and can be applied to explain the formation of complex hydraulic fractures in unconventional reservoirs.
مشاهده آنلاین و دریافت فایل نمونه:
https://drive.google.com/file/d/0B3BBM5yT_t4ZcmpQUjBiZmR3WW8
** توجه: خواهشمندیم در صورت هرگونه مشکل در روند خرید و دریافت فایل از طریق بخش پشتیبانی در سایت مشکل خود را گزارش دهید. **
اینفور ماتور گشایشهای شطرنج Encyclopaedia of Chess Openings D16-19 Slav Defence
اختصاصی از کوشا فایل اینفور ماتور گشایشهای شطرنج Encyclopaedia of Chess Openings D16-19 Slav Defence دانلود با لینک مستقیم و پرسرعت .
دایره المعارف گشایشهای شطرنج دفاع اسلاو
Encyclopaedia of Chess Openings D16-19 Slav Defence
D16-19 SLAV DEFENCE BY RIBLI
Slav D 16-19
توسط استاد بزرگ زولتان ریبلی
فرمت pdf
انتشارات:اینفور ماتور شطرنج
نسخه اورجینال
اینفور ماتور گشایشهای شطرنج ، توسط استاد بزرگ قوی مجارستانی، که دو بار نامزد برای مسابقات قهرمانی شطرنج جهان بود.
هر چند این کتاب در سال 1996 منتشر شد، اما هم مفید و مرتبط است. حاشیه نویسی عمیق و دقیق هستند،با زبان جهانی شطرنج ECO و با توجه به سنت از این سری کتاب به پایان می رسد با یک صد بازی (عمدتا در سطح جهانی )، یک گنجینه خوب برای بازیکنانی که دفاع اسلاو بازی میکنند
PRODUCT DESCRIPTION
Choose FIVE Opening Monographs books at the special price!
D16-19 Slav Defence by Zoltan Ribli,
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dc4 5.a4...
180 pages, year 1996.
دانلود کتاب ارزشمند دایره المعارف مینیاتورهای شطرنج 2014 Encyclopedia of Chess Miniatures
اختصاصی از کوشا فایل دانلود کتاب ارزشمند دایره المعارف مینیاتورهای شطرنج 2014 Encyclopedia of Chess Miniatures دانلود با لینک مستقیم و پرسرعت .
دایره المعارف مینیاتورهای شطرنج
2014 Encyclopedia of Chess Miniatures
شامل 1635 مینیاتور و بازی های کوتاه
فرمت pdf
تعداد صفحات 562
نسخه اصلی
نوشته شده به زبان سنبلینک شطرنج
سطح مبتدی تا پیشرفته
بازیهای کوتاه و آموزنده و ترکیب های بی نظیر از سال 1924 تا 2014
Encyclopedia of Chess Miniatures
Hardback, 560 pages, 1636 annotated games, June 2014
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The new Encyclopedia of Chess Miniatures presents a rich collection of short games that will evoke a sense of surprise, sensation and even shock in the mind of the chess playing reader.
When should a game be classed as a ‘miniature’? Well, in terms of length, those given here do not go beyond the 20th move. And although there are in fact some examples that do last slightly longer, this is solely due to ‘chess inertia’ – a player’s reluctance to accept the inevitability of a humiliating blitzkriegdefeat!
The prime objective of this Encyclopedia, however, does not lie in numbers, but in promoting an acute awareness of the many potential disasters lying in wait for the unsuspecting chess player in the early stages of the game. Each one of these miniatures spells danger and requires vigilance from the very first moves. In fact reading this book might well prompt readers to step up their level of reconnaissance in the opening phase. In this way they will not only protect themselves against devilish traps and pitfalls but also be primed to plant a few tactical devices of their own.
All chess players will learn valuable lessons from these miniatures, as there are concrete reasons why a game of chess ends so rapidly. After all, even grandmasters sometimes find themselves on the receiving end of a first round knockout!
Apart from the basic introductory examples, the miniatures in the book are classified according to the ECO code. This makes it easy for readers, familiar with the Chess Informant environment, to navigate their way around the large amount of material and quickly locate games played with openings that form part of their own repertoire.
Meanwhile, apart from the utility value, it is fun to play through miniatures, as they also offer pure chess enjoyment. On the one hand, we see cute checkmates and well-coordinated combinations, on the other, instructive mistakes and the shock of the unexpected. No, we are not talking about players making crude blunders, but rather succumbing to the subtle art of deception.
Because miniatures are all over so quickly, there is often no need for the reader even to use a chessboard, let alone a computer, to understand the reasons why the loser was never in with a chance of reaching the middle game!
In the process of selection, the authors, GM Branko Tadic and IM Goran Arsovic, compiled a ‘short list’(!) from more than 10,000 candidate games. This has resulted in an Encyclopedia of 1636 miniatures, all annotated, played between 1560 and 2014, and thereby covering chess creativity and ingenuity, past and present.
Josip Asik, CEO of Chess Informant
بازیهای کوتاه و آموزنده و ترکیب های بی نظیر
