pwn martinus nijhoff (2 risultati)

Hardcover. Condizione: Near Fine. Cloth hardcover, translated from the Polish, vii + 149 pages, references (pp.139-146) & index, NOT ex-library. --- Copy looks unread, interior is clean and bright throughout, with unmarked text and firm binding. Negligible light wear to very tips of some page corners. Gentle age-discolouration to edges of boards and a limited area of mid-front board. Dust jacket shows one very minor edge-nick, else untorn, with moderate creasing to edges, little scuffing, signs of regular shelfwear, a few scratches. --- This book contains the theoretical foundations for the description of random phenomena in mechanics, with particular emphasis on dynamic systems. Before proceeding to basic ideas, the first chapter deals with certain fundamental problems of deterministic mechanics, such as: the differential equations of motion, the concept of configuration space, phase space, and the concept of stability. Then Chapter 2 presents the axiomatic foundations of the theory of stochastic processes and stochastic differential equations, emphasizing their analogy to mechanics. Following these fundamentals, the third chapter is devoted to a determination of probability density of functions of random variables. Also, it solves the problem of exceeding a boundary of domain by stochastic processes. The presentation is based on the sequential theory of stochastic processes. Chapter 4 presents the basic methods of stochastic dynamics of linear systems: correlation and spectral theory. The generalized spectral method in the theory of non-stationary processes is then considered. Finally, the applications of the correlation and spectral theory to systems with many degrees of freedom, as well as continuous systems are given. The fifth chapter presents the application of the kinetic Fokker-Planck-Kolmogorov equation to solving non-linear problems. Chapter 6 discusses fundamental concepts of stability in random systems. The extension of the direct Lyapounov method to investigating stability of stochastic systems is presented. The theoretical analysis is illustrated by a number of practical examples. The book contains an extensive listing of bibliography, East European particularly.

Hardcover. Condizione: Very Good. Condizione sovraccoperta: Good. 1st Edition. Scarce cloth hardcover, xiv + 321 pages, NOT ex-library. Faint age-discolourations on endpapers. Pages and outer page edges are untanned, book is clean throughout with unmarked text, free of inscriptions and stamps, firmly bound. Dust jacket with noticeably scuffed edges, scratches, shelfwear. -- The book gives, in a relatively concise but sufficiently general manner, an exposition of the fundamentals of the mechanics of viscoelastic fluids and its relation to modern continuum mechanics. The most important considerations are those concerned with the cognitive character of the various theories, their experimental verification and possible applications. The arrangement of the material in the book reflects the principle that information about the properties of viscoelastic fluids depends in an essential way on the class of flows under consideration. Chapter 1 contains a brief account of the basic concepts. Chapter 2 discusses the general theory of the constitutive equations of simple fluids and presents in an encyclopaedic manner the most important models. Chapter 3 is devoted to the class of viscometric flows which play an important part in processing and laboratory research. The classes of flows with constant and proportional stretch histories are considered in Chapter 4. Chapter 5 treats more extensively complex and dynamic flows, paying considerable attention to disturbed flows and slightly viscometric flows. Finally, the secondary flows, some stability problems and certain aspects of shear-wave propagation are examined in Chapter 6. The book is intended for scientists, postgraduate students and other students interested in the mechanics of viscoelastic fluids. Specialists in the fleld of polymer processing will also find it useful. Stefan Zahorski (b. 1933), lecturer at the Technical University of Warsaw in 1954-1961; Head of the Polymer Physics Laboratory at the Institute of Fundamental Technological Research in Warsaw since 1969, professor at the Polish Academy of Sciences since 1972. Author of 2 books and over 90 papers on finite elasticity, plasticity, rheology and mechanics of non-Newtonian fluids published in various international and domestic periodicals.