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Dynamics of Stochastic Systems
1st Edition - March 17, 2005
Author: Valery I. Klyatskin
Language: English
eBook ISBN:9780080504858
9 7 8 - 0 - 0 8 - 0 5 0 4 8 5 - 8
Fluctuating parameters appear in a variety of physical systems and phenomena. They typically come either as random forces/sources, or advecting velocities, or media (material)…Read more
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Fluctuating parameters appear in a variety of physical systems and phenomena. They typically come either as random forces/sources, or advecting velocities, or media (material) parameters, like refraction index, conductivity, diffusivity, etc. The well known example of Brownian particle suspended in fluid and subjected to random molecular bombardment laid the foundation for modern stochastic calculus and statistical physics. Other important examples include turbulent transport and diffusion of particle-tracers (pollutants), or continuous densities (''oil slicks''), wave propagation and scattering in randomly inhomogeneous media, for instance light or sound propagating in the turbulent atmosphere.
Such models naturally render to statistical description, where the input parameters and solutions are expressed by random processes and fields.
The fundamental problem of stochastic dynamics is to identify the essential characteristics of system (its state and evolution), and relate those to the input parameters of the system and initial data.
This raises a host of challenging mathematical issues. One could rarely solve such systems exactly (or approximately) in a closed analytic form, and their solutions depend in a complicated implicit manner on the initial-boundary data, forcing and system's (media) parameters . In mathematical terms such solution becomes a complicated "nonlinear functional" of random fields and processes.
Part I gives mathematical formulation for the basic physical models of transport, diffusion, propagation and develops some analytic tools.
Part II sets up and applies the techniques of variational calculus and stochastic analysis, like Fokker-Plank equation to those models, to produce exact or approximate solutions, or in worst case numeric procedures. The exposition is motivated and demonstrated with numerous examples.
Part III takes up issues for the coherent phenomena in stochastic dynamical systems, described by ordinary and partial differential equations, like wave propagation in randomly layered media (localization), turbulent advection of passive tracers (clustering).
Each chapter is appended with problems the reader to solve by himself (herself), which will be a good training for independent investigations.
· This book is translation from Russian and is completed with new principal results of recent research.· The book develops mathematical tools of stochastic analysis, and applies them to a wide range of physical models of particles, fluids, and waves.· Accessible to a broad audience with general background in mathematical physics, but no special expertise in stochastic analysis, wave propagation or turbulence
Researchers in physics (fluid dynamics, optics, acoustics, radiophysics), geosciences (ocean, atmosphere physics), applied mathematics (stochastic equations), applications (coherent phenomena). Senior and postgraduate students in different areas of physics, engineering and applied mathematics.
Preface
Introduction
Part I: Dynamical description of stochastic systems
Chapter 1: Examples, basic problems, peculiar features of solutions
1.1 Ordinary differential equations: initial value problems
1.2 Boundary-value problems for linear ordinary differential equations (plane waves in layered media)
1.3 Partial differential equations
Chapter 2: Solution dependence on problem type, medium parameters, and initial data
2.1 Functional representation of problem solution
2.2 Solution dependence on problem’s parameters
Part II: Statistical description of stochastic systems
Chapter 3: Indicator function and Liouville equation
3.1 Ordinary differential equations
3.2 First-order partial differential equations
3.3 Higher-order partial differential equations
Chapter 4: Random quantities, processes and fields
4.1 Random quantities and their characteristics
4.2 Random processes, fields, and their characteristics
4.3 Markovian processes
Problems
Chapter 5: Correlation splitting
5.1 General remarks
5.2 Gaussian process
5.3 Poisson process
5.4 Telegrapher’s random process
5.5 Delta-correlated random processes
Problems
Chapter 6: General approaches to analyzing stochastic dynamic systems
6.1 Ordinary differential equations
6.2 Completely solvable stochastic dynamic systems
6.3 Delta-correlated fields and processes
Problems
Chapter 7: Stochastic equations with the Markovian fluctuations of parameters
7.1 Telegrapher’s processes
7.2 Gaussian Markovian processes
Problems
Chapter 8: Gaussian delta-correlated random field (ordinary differential equations)
8.1 The Fokker-Planck equation
8.2 Transition probability distributions
8.3 Applicability range of the Fokker–Planck equation
Problems
Chapter 9: Methods for solving and analyzing the Fokker-Planck equation
9.1 Wiener random process
9.2 Logarithmic-normal random process
9.3 Integral transformations
9.4 Steady-state solutions of the Fokker-Planck equation
9.5 Boundary-value problems for the Fokker-Planck equation (transfer phenomena)
9.6 Method of fast oscillation averaging
Problems
Chapter 10: Gaussian delta-correlated random field (causal integral equations)
Problems
Part III: Examples of coherent phenomena in stochastic dynamic systems
Chapter 11: Passive tracer clustering and diffusion in random hydrodynamic flows
11.1 Lagrangian description (particle diffusion)
11.2 Diffusion of passive tracer concentration in random velocity field
11.3 Effect of molecular diffusion
Problems
Chapter 12: Wave localization in randomly layered media
12.1 Statistics of scattered field at layer boundaries
12.2 Statistical theory of radiative transfer
12.3 Numerical simulation
Problems
Bibliography
Index
No. of pages: 212
Language: English
Edition: 1
Published: March 17, 2005
Imprint: Elsevier Science
eBook ISBN: 9780080504858
VK
Valery I. Klyatskin
Born in 1940 in Moscow, USSR, Valery I. Klyatskin received his secondary education at school in Tbilisi, Georgia, finishing in 1957. Seven years later he graduated from Moscow Institute of Physics and Technology (FIZTEX), whereupon he took up postgraduate studies at the Institute of Atmospheric Physics USSR Academy of Sciences, Moscow gaining the degree of Candidate of Physical and Mathematical Sciences (Ph.D) in 1968. He then continued at the Institute as a researcher, until 1978, when he was appointed as Head of the Wave Process Department at the Pacific Oceanological Institute of the USSR Academy of Sciences, based in Vladivostok. In 1992 Valery I. Klyatskin returned to Institute of Atmospheric Physics Russian Academy of Sciences, Moscow when he was appointed to his present position as Chief Scientist. At the same time he is Chief Scientific Consultant of Pacific Oceanological Institute Russian Academy of Sciences, Vladivostok. In 1977 he obtained a doctorate in Physical and Mathematical Sciences and in 1988 became Research Professor of Theoretical and Mathematical Physics, Russian Academy of Science.
Affiliations and expertise
Russian Academy of Science, Russia
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