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METHODS FOR SOLVING MATHEMATICAL PHYSICS PROBLEMS

The authors have tried to select for the book methods that have become classical and generally accepted. However, some of the current versions of these methods may be missing from the book because they require special knowledge. The book is of the handbook-teaching type. On the one hand, the book describes the main definitions, the concepts of the examined methods and approaches used in them, and also the results and claims obtained in every specific case. On the other hand, proofs of the majority of these results are not presented and they are given only in the simplest (methodological) cases.

METHODS FOR SOLVING INVERSE PROBLEMS IN MATHEMATICAL PHYSICS

The theory of inverse problems for differential equations is being extensively developed within the framework of mathematical physics. In the study of the so-called direct problems the solution of a given differential equation or system of equations is realised by means of supplementary conditions, while in inverse problems the equation itself is also unknown. The determination of both the governing equation and its solution necessitates imposing more additional conditions than in related direct problems. The sources of the theory of inverse problems may be found late in the 19th century or early 20th century. They include the problem of equilibrium figures for the rotating fluid, the kinematic problems in seismology, the inverse Sturm-Liuville problem and more. Newton’s problem of discovering forces making planets move in accordance with Kepler’s laws was one of the first inverse problems in dynamics of mechanical systems solved in the past. Inverse problems in potential theory in which it is required to determine the body’s position, shape and density from available values of its potential have a geophysical origin. Inverse problems of electromagnetic exploration were caused by the necessity to elaborate the theory and methodology of electromagnetic fields in investigations of the internal structure of Earth’s crust

Стратегия голубого океана. Как найти или создать рынок, свободный от других игроков

Мы приглашаем вас прочесть эту книгу и применить ее идеи и концепции на практике: в своей компании, на своем предприятии. Голубые океаны возможностей лежат вокруг нас. Нет необходимости конкурировать, когда можно обратить свою энергию на дело созидания

Metal Machining Theory and Applications

Improved manufacturing productivity, over the last 50 years, has occurred in the area of machining through developments in the machining process, in machine tool technology and in manufacturing management. The subject of this book is the machining process itself, but placed in the wider context of manufacturing productivity. It is mainly concerned with how mechanical and materials engineering science can be applied to understand the process better and to support future improvements.

Карбамид-аммиакли селитра ўғитининг кузги буғдой ҳосилдорлигини оширишдаги аҳамияти

Аввалдан суғорилиб келинадиган, сув эрозиясига мойил типик бўз тупроқлар шароитида КАС ўғитини кузги буғдойдаги самарадорлиги деярли аммиакли селитрага тенглиги аниқланди.

THEORETICAL MECHANICS

In this chapter we shall deal with the study of the motion of the non deformable bodies, namely of the rigid bodies. We have seen in the previously chapters that in the study of the motion we have to answer to two questions (which will remain the same for the bodies) namely: which is the position of the body in any instant of the motion and how is performed its motion? The rigid body may be considered (we have seen this propriety in the first part of this mechanics) as a non deformable and continuous system of particles. At the limit the number of these particles tends to infinity.

МАҲАЛЛИЙ ГИЛ МИНЕРАЛЛАР ВА УЛАРНИНГ КОМПОЗИЦИЯЛАРИ АСОСИДА ПОЛИФУНКЦИОНАЛ БУРГИЛАШ ЭРИТМАЛАРИНИ ОЛИШ ТЕХНОЛОГИЯСИНИ ИШЛАБ ЧИҚИШ

Дунёда нефт-газ қудуқларини самарали бурғилаш асосан бурғилаш эритмаларининг таркиби ва хоссаларига боғлиқ, ўз навбатида улар бурғилашнинг юқори тезлиги ва маҳсулдор қатламини сифатли очиш ишларида хавфсизлик ва авария бўлмаслигини таъминлаши зарур. Бошқариладиган хоссаларига эга бурғилаш эритмаларидан фойдаланиш, авариялар, қийинчиликлар, ювиш тозалаш, давомийлиги билан боғлиқ бўлган вақт сарфини иқтисод қилиш мақсадида ва ўзлаштириш натижалари учун асосланган равишда катта сарфларни талаб қилади.

Правила моей жизни

А тем моим прекрасным читателям, которые смогли дочитать книгу до конца, я хочу повторить ту же самую фразу, которой заканчивал свои предыдущие две книги: Лучше быть счастливым и богатым, чем бедным и больным! Только вперед, братцы! Только вперед!

Соя ҳосилдорлигига экиш меъёрининг таъсири

Тажрибанинг мақсади ва вазифалари. Ғалладан бўшаган ерларга такрорий экилган соя навларининг онтогенезда ривожланишини, хосил шаклланишини тадқикот килиб, юкори дон ва кўк масса хосилини таъминлайдиган соя навини танлаб мукобил ўғит меъёрининг ва нитрагиннинг таъсирини аниклаб беришдир.

Mechanics of Materials

The main objective of a basic mechanics course should be to develop in the engineering student the ability to analyze a given problem in a simple and logical manner and to apply to its solution a few fundamental and well-understood principles. This text is designed for the first course in mechanics of materials—or strength of materials—offered to engineering students in the sophomore or junior year. The authors hope that it will help instructors achieve this goal in that particular course in the same way that their other texts may have helped them in statics and dynamics. To assist in this goal, the seventh edition has undergone a complete edit of the language to make the book easier to read.

Ватанга бахшида умр

Ушбу китоб мустақил Ўзбекистонимизда молия соҳасини ривожлантиришида улкан ҳисса қўшган олижаноб инсон, давлат арбоби, иктисодчи, олим ва педагог Абдурахимов Саидакбар Х,ожакбаровичнинг ёрқин хотирасига багишланади. Китобимизнинг мазкур 1-қисмидан С.Х,.Абдурах,имовнинг қиска бўлса-да, ўта мазмунли ҳаёт-фаолияти х,амда дўстлари, ҳамкасблари ва шогирдларининг хотиралари ўрин олган.

THEORETICAL MECHANICS

Mechanics may be defined as that science that describe and develop the conditions of equilibrium or of the motion of the material bodies under the action of the forces. Mechanics can be divided in three large parts, function of the studied object: mechanics of the no deformable bodies (mechanics of the rigid bodies), mechanics of the deformable bodies (strength of the materials, elasticity, building analysis) and fluid mechanics.

45 татуировок продавана. Правила для тех, кто продает и управляет продажами

Автор, как всегда, опирается на концентрированный здравый смысл и контакт с реальностью – российской реальностью, которая может отличаться от других так же, как русская зима отличается от техасского лета.

Икардадан келтирилган буғдой нав намуналарининг муҳим хўжалик белгиларини ўрганиш

Буғдой ўсимлигининг совуққа ва қишга чидамлилиги экиш муддати ва уруғни экиш чуқурлигига боғлиқ экан. Агар қанчалик эрта экилса шунчалик эрта туплашиб, тупланиш даврида қишлашга киради. Тупланиш даврида қишлашга кирганда ўимликларнинг нобуд бўлши камроқ бўлиши юқоридаги маълумотлардан кўринмоқда.

Matrix Quantum Mechanics and Two-dimensional String Theory in Non-trivial Backgrounds

String theory is the most promising candidate for the theory unifying all interactions including gravity. It has an extremely difficult dynamics. Therefore, it is useful to study some its simplifications. One of them is non-critical string theory which can be defined in low dimensions. A particular interesting case is 2D string theory. On the one hand, it has a very rich structure and, on the other hand, it is solvable. A complete solution of 2D string theory in the simplest linear dilaton background was obtained using its representation as Matrix Quantum Mechanics. This matrix model provides a very powerful technique and reveals the integrability hidden in the usual CFT formulation. This thesis extends the matrix model description of 2D string theory to non-trivial backgrounds. We show how perturbations changing the background are incorporated into Matrix Quantum Mechanics. The perturbations are integrable and governed by Toda Lattice hierarchy. This integrability is used to extract various information about the perturbed system: correlation functions, thermodynamical behaviour, structure of the target space. The results concerning these and some other issues, like non-perturbative effects in non-critical string theory, are presented in the thesis.

45 татуировок менеджера. Правила российского руководителя

Это книга о менеджменте. Книг о менеджменте миллионы. Но эту книгу написал профессионал. И описал в ней правила, эффективность и значимость которых проверял на себе. И поэтому он имеет право делиться с вами.