Functional Approach to Nonlinear Models of Water Flow in Soils

Functional Approach to Nonlinear Models of Water Flow in Soils
Author: G. Marinoschi
Publisher: Springer Science & Business Media
Total Pages: 325
Release: 2006-09-05
Genre: Mathematics
ISBN: 1402048807

This work of applied mathematics focuses on the functional study of the nonlinear boundary value problems relating to water flow in porous media, a topic which has not up to now been explored in book form. The author shows that abstract theory may be sometimes easier and richer in consequences for applications than standard classical approaches are. The volume deals with diffusion type models, emphasizing the mathematical treatment of their nonlinear aspects.

Dual Variational Approach to Nonlinear Diffusion Equations

Dual Variational Approach to Nonlinear Diffusion Equations
Author: Gabriela Marinoschi
Publisher: Springer Nature
Total Pages: 223
Release: 2023-03-28
Genre: Mathematics
ISBN: 3031245830

This monograph explores a dual variational formulation of solutions to nonlinear diffusion equations with general nonlinearities as null minimizers of appropriate energy functionals. The author demonstrates how this method can be utilized as a convenient tool for proving the existence of these solutions when others may fail, such as in cases of evolution equations with nonautonomous operators, with low regular data, or with singular diffusion coefficients. By reducing it to a minimization problem, the original problem is transformed into an optimal control problem with a linear state equation. This procedure simplifies the proof of the existence of minimizers and, in particular, the determination of the first-order conditions of optimality. The dual variational formulation is illustrated in the text with specific diffusion equations that have general nonlinearities provided by potentials having various stronger or weaker properties. These equations can represent mathematical models to various real-world physical processes. Inverse problems and optimal control problems are also considered, as this technique is useful in their treatment as well.

Degenerate Nonlinear Diffusion Equations

Degenerate Nonlinear Diffusion Equations
Author: Angelo Favini
Publisher: Springer
Total Pages: 165
Release: 2012-05-08
Genre: Mathematics
ISBN: 3642282857

The aim of these notes is to include in a uniform presentation style several topics related to the theory of degenerate nonlinear diffusion equations, treated in the mathematical framework of evolution equations with multivalued m-accretive operators in Hilbert spaces. The problems concern nonlinear parabolic equations involving two cases of degeneracy. More precisely, one case is due to the vanishing of the time derivative coefficient and the other is provided by the vanishing of the diffusion coefficient on subsets of positive measure of the domain. From the mathematical point of view the results presented in these notes can be considered as general results in the theory of degenerate nonlinear diffusion equations. However, this work does not seek to present an exhaustive study of degenerate diffusion equations, but rather to emphasize some rigorous and efficient techniques for approaching various problems involving degenerate nonlinear diffusion equations, such as well-posedness, periodic solutions, asymptotic behaviour, discretization schemes, coefficient identification, and to introduce relevant solving methods for each of them.

Applied Analysis And Differential Equations

Applied Analysis And Differential Equations
Author: Ovidiu Carja
Publisher: World Scientific
Total Pages: 363
Release: 2007-03-27
Genre: Mathematics
ISBN: 9814475726

This volume contains refereed research articles written by experts in the field of applied analysis, differential equations and related topics. Well-known leading mathematicians worldwide and prominent young scientists cover a diverse range of topics, including the most exciting recent developments.A broad range of topics of recent interest are treated: existence, uniqueness, viability, asymptotic stability, viscosity solutions, controllability and numerical analysis for ODE, PDE and stochastic equations. The scope of the book is wide, ranging from pure mathematics to various applied fields such as classical mechanics, biomedicine, and population dynamics.

Modeling with Itô Stochastic Differential Equations

Modeling with Itô Stochastic Differential Equations
Author: E. Allen
Publisher: Springer Science & Business Media
Total Pages: 239
Release: 2007-03-08
Genre: Mathematics
ISBN: 1402059531

This book explains a procedure for constructing realistic stochastic differential equation models for randomly varying systems in biology, chemistry, physics, engineering, and finance. Introductory chapters present the fundamental concepts of random variables, stochastic processes, stochastic integration, and stochastic differential equations. These concepts are explained in a Hilbert space setting which unifies and simplifies the presentation.

Stochastic Equations in Infinite Dimensions

Stochastic Equations in Infinite Dimensions
Author: Giuseppe Da Prato
Publisher: Cambridge University Press
Total Pages: 513
Release: 2014-04-17
Genre: Mathematics
ISBN: 1107055849

Updates in this second edition include two brand new chapters and an even more comprehensive bibliography.

Nonlinear Differential Equations of Monotone Types in Banach Spaces

Nonlinear Differential Equations of Monotone Types in Banach Spaces
Author: Viorel Barbu
Publisher: Springer Science & Business Media
Total Pages: 283
Release: 2010-01-01
Genre: Mathematics
ISBN: 1441955429

This monograph is concerned with the basic results on Cauchy problems associated with nonlinear monotone operators in Banach spaces with applications to partial differential equations of evolutive type. It focuses on major results in recent decades.

Encyclopedia of Agrophysics

Encyclopedia of Agrophysics
Author: Jan Gliński
Publisher: Springer Science & Business Media
Total Pages: 1075
Release: 2011-06-07
Genre: Technology & Engineering
ISBN: 9048135842

This Encyclopedia of Agrophysics will provide up-to-date information on the physical properties and processes affecting the quality of the environment and plant production. It will be a "first-up" volume which will nicely complement the recently published Encyclopedia of Soil Science, (November 2007) which was published in the same series. In a single authoritative volume a collection of about 250 informative articles and ca 400 glossary terms covering all aspects of agrophysics will be presented. The authors will be renowned specialists in various aspects in agrophysics from a wide variety of countries. Agrophysics is important both for research and practical use not only in agriculture, but also in areas like environmental science, land reclamation, food processing etc. Agrophysics is a relatively new interdisciplinary field closely related to Agrochemistry, Agrobiology, Agroclimatology and Agroecology. Nowadays it has been fully accepted as an agricultural and environmental discipline. As such this Encyclopedia volume will be an indispensable working tool for scientists and practitioners from different disciplines, like agriculture, soil science, geosciences, environmental science, geography, and engineering.

Numerical Optimization in Engineering and Sciences

Numerical Optimization in Engineering and Sciences
Author: Debashis Dutta
Publisher: Springer Nature
Total Pages: 569
Release: 2020-04-07
Genre: Technology & Engineering
ISBN: 981153215X

This book presents select peer-reviewed papers presented at the International Conference on Numerical Optimization in Engineering and Sciences (NOIEAS) 2019. The book covers a wide variety of numerical optimization techniques across all major engineering disciplines like mechanical, manufacturing, civil, electrical, chemical, computer, and electronics engineering. The major focus is on innovative ideas, current methods and latest results involving advanced optimization techniques. The contents provide a good balance between numerical models and analytical results obtained for different engineering problems and challenges. This book will be useful for students, researchers, and professionals interested in engineering optimization techniques.