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Основы марковской теории нелинейной обработки случайных полей |
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Категория: Технические науки » Электроника, радиотехника, связь |
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Автор: Шмелев А.Б.
Издательство: МФТИ
Год издания: 1998
isbn: 5-89155-029-6
Количество страниц: 208
Язык: русский
Формат: DJVU
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На базе обобщения марковского подхода к проблеме нелинейного оценивания случайных процессов изложены основы теории нелинейной обработки случайных полей применительно к задачам оптимального приема сигналов и выделения полезной информации в крупноапертурных и многопозиционных информационно-измерительных системах. Основное внимание уделено вопросам синтеза и анализа алгоритмов пространственно-временного оценивания фазовых флуктуации сигналов, наблюдаемых в смеси с гауссовским шумом. Рассмотрены вопросы пространственно-временного квазикогерентного приема модулированных сигналов, испытывающих фазовые искажения. Проанализирована взаимосвязь между отношением правдоподобия и апостериорными характеристиками случайных сигналов. Рассмотрены некоторые вопросы временной обработки сигналов, наблюдаемых на фоне негауссовских импульсных помех.
Для научных работников и инженеров, работающих в области локации, связи, обработки информации и в смежных областях. |
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Southern Philippines 27 February - 4 July 1945 |
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Категория: Военное дело » История войн |
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Автор: Stephen J. Lofgren
Издательство: Center of Military History United States Army
Год издания: 1996
Количество страниц: 36
Язык: english
Формат: PDF (scan)
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The U.S. Army Campaigns of World War II.
World War II was the largest and most violent armed conflict in the history of mankind. However, the half century that now separates us from that conflict has exacted its toll on our collective knowledge. While World War II continues to absorb the interest of military scholars and historians, as well as its veterans, a generation of Americans has grown to maturity largely unaware of the political, social, and military implications of a war that, more than any other, united us as a people with a common purpose. Highly relevant today, World War II has much to teach us, not only about the profession of arms, but also about military preparedness, global strategy, and combined operations in the coalition war against fascism. To commemorate the nation’s 50th anniversary of World War II, the U.S. Army has published a variety of materials to help educate Americans about that momentous experience. These works provide great opportunities to learn about and renew pride in an Army that fought so magnificently in what has been called “the mighty endeavor.” World War II was waged on land, on sea, and in the air over several diverse theaters of operation for approximately six years. The following essay is one of a series of campaign studies highlighting those struggles that, with their accompanying suggestions for further reading, are designed to introduce you to one of the Army’s significant military feats from that war. This brochure was prepared in the U.S. Army Center of Military History by Stephen J. Lofgren. I hope this absorbing account of that period will enhance your appreciation of American achievements during World War II.
John W. Mountcastle, Brigadier General, USA Chief of Military History. |
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Petroleum Engineering Handbook. Volume 2. Drilling Engineering |
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Категория: Технические науки » Другие технические науки |
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Автор: Lake L.W. Mitchell R.F.
Издательство: Society of Petroleum Engineers
Год издания: 2007
isbn: 978-1-55563-114-7
Количество страниц: 763
Язык: english
Формат: PDF
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You hold in your hand the very fi rst Drilling Engineering volume of the SPE Petroleum Engineering Handbook. This volume is intended to provide a good snapshot of the drilling state of the art at the beginning of the 21st century.
Obviously, the history of well drilling goes back for millennia. The history of “scientifi c” oilwell drilling had its beginnings at the end of Word War II. Perhaps one indication was that while Petroleum was fi rst established as a Division of the American Inst. of Mining, Metallurgical, and Petroleum Engineers (AIME) in 1922, it was not established as a Branch until 1948. The fi rst SPE reprinted volume of the Petroleum Branch was the 1953 Transactions of the AIME, Petroleum Development and Technology (Vol. 198). This volume had a total of seven papers related to drilling and completion topics, a relatively small proportion of the total of 344 pages.
The fi rst wave of scientifi c drilling was an era of slide rules and hand calculations. Several references give an idea of the technology level of this era; Developments in Petroleum Engineering by Arthur Lubinski (1987) provides a good overview of the mechanical engineering aspects of drilling, while W.F. Rogers’ Composition and Properties of Oil Well Drilling Fluids (fi rst edition) gives a picture of wellbore hydraulics in 1948. The technology of this era consisted of relatively simple but effective models of very complex phenomena. Former SPE President Claude Hocott once said that any calculation that could not be summarized on a note card would not be useful, and for that era, he was correct. Today, it is diffi cult to appreciate the tedium of evaluating these simple formulas with a slide rule.
The next wave of scientifi c drilling introduced a new computational tool—the electronic computer—beginning in the 1970s.
Young engineers, who had used primitive computers as part of their university education, were now ready to break Hocott’s onecard rule and delve into the complexity of the phenomena of drilling. As an example of the explosion of knowledge, consider the 1980 Transactions of the Society of Petroleum Engineers (Vol. 269) (note the name change!). The size of the volume nearly doubled to 629 pages, and the number of drilling- and completion-related papers increased 10-fold. To get a feel for the technology level of this era, the textbook Applied Drilling Engineering by A.T. Bourgoyne et al. gives a good overview of the state of the art in 1984.
We are now beginning a third wave of scientifi c drilling. The days of novel computer application are reaching their twilight years, and a period of evaluation and consolidation is beginning. Computer science and numerical analysis are at a much higher level of accuracy and sophistication today than they were in the 1970s, and many of the technology developments of that era could be re-examined in light of modern techniques. Further, we all recognize that the computer can do far more than just execute numerical calculations. While we can anticipate some of these developments, I suspect we will fi nd that we did not dream big enough.
In an effort like this, the editor quickly recognizes the multidisciplinary nature of the modern drilling process, and his own inadequacies in most of these disciplines. I would like to thank the efforts of this volume’s authors, going above and beyond the call of duty with little fi nancial reward but with, perhaps, a little fame for being the fi rst. I also would like to thank James Bobo for getting this effort off the ground and providing guidance early in the process. I also thank the Editor-in-Chief, Larry W. Lake, for offering me this task and not allowing me to say no. |
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Why Wing Chun Works |
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Категория: Физкультура и спорт, активный отдых » Боевые искусства |
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Автор: Alan Gibson
Издательство: The Peacenik Press
Год издания: 2000
isbn: 0953489507
Количество страниц: 101
Язык: english
Формат: PDF
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В этой книге, в доступной форме, объясняются все важные концепции, принципы и основные методы подготовки Вин Чун. Книга прекрасно иллюстрированна понятными рисунками и диаграммами.
Книга "Почему Вин Чун работает" будет также полезна для мастеров других боевых искусств, желающих расширить свой кругозор, изучая различные системы. Эта книга объясняет, как Вин Чун работает, почему он эффективен на практике, и почему его методы разительно отличаются от других видов боевых искусств. |
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Southern France 15 August - 14 September 1944 |
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Категория: Военное дело » История войн |
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Автор: Jeffrey J. Clarke
Издательство: Center of Military History United States Army
Год издания: 1994
isbn: 2876723905
Количество страниц: 32
Язык: english
Формат: PDF (scan)
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The U.S. Army Campaigns of World War II.
World War II was the largest and most violent armed conflict in the history of mankind. However, the half century that now separates us from that conflict has exacted its toll on our collective knowledge. While World War II continues to absorb the interest of military scholars and historians, as well as its veterans, a generation of Americans has grown to maturity largely unaware of the political, social, and military implications of a war that, more than any other, united us as a people with a common purpose. Highly relevant today, World War II has much to teach us, not only about the profession of arms, but also about military preparedness, global strategy, and combined operations in the coalition war against fascism. During the next several years, the U.S. Army will participate in the nation’s 50th anniversary commemoration of World War II. The commemoration will include the publication of various materials to help educate Americans about that war. The works produced will provide great opportunities to learn about and renew pride in an Army that fought so magnificently in what has been called “the mighty endeavor.” World War II was waged on land, on sea, and in the air over several diverse theaters of operation for approximately six years. The following essay is one of a series of campaign studies highlighting those struggles that, with their accompanying suggestions for further reading, are designed to introduce you to one of the Army’s significant military feats from that war. This brochure was prepared in the U.S. Army Center of Military History by Jeffrey J. Clarke. I hope this absorbing account of that period will enhance your appreciation of American achievements during World War II.
Gordon R. Sullivan, General, United States Army Chief of Staff. |
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Школа рисования от А до Я. Рисуем животных |
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Категория: Хобби, коллекционирование » Рисование, живопись |
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Автор: А. А. Марковская
Издательство: Книжный клуб "Клуб семейного досуга"
Год издания: 2011
isbn: 978-5-9910-1611-7, 978-966-14-1337-4
Количество страниц: 96
Язык: русский
Формат: PDF
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Эта книга научит вас рисовать животных не только в покое, но и в движении!
Следуя пошаговым инструкциям, вы легко и быстро освоите техники рисования карандашом, углем, гелевой ручкой и тушью, изображая зверей, птиц, рыб и насекомых. |
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Вечерний киносеанс у Таи |
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Категория: Домоводство, досуг » Любовь, эротика |
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Автор: Dakina
Издательство: Palcomix
Количество страниц: 20
Язык: русский
Формат: DJVU
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Вечерний киносеанс у Таи - эротический комикс |
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