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Compatible Spatial Discretizations

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Release : 2007-01-26
Genre : Mathematics
Kind : eBook
Book Rating : 345/5 ( reviews)

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Book Synopsis Compatible Spatial Discretizations by : Douglas N. Arnold

Download or read book Compatible Spatial Discretizations written by Douglas N. Arnold. This book was released on 2007-01-26. Available in PDF, EPUB and Kindle. Book excerpt: The IMA Hot Topics workshop on compatible spatialdiscretizations was held in 2004. This volume contains original contributions based on the material presented there. A unique feature is the inclusion of work that is representative of the recent developments in compatible discretizations across a wide spectrum of disciplines in computational science. Abstracts and presentation slides from the workshop can be accessed on the internet.

Compatible Spatial Discretizations for Partial Differential Equations

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Release : 2004
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

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Book Synopsis Compatible Spatial Discretizations for Partial Differential Equations by :

Download or read book Compatible Spatial Discretizations for Partial Differential Equations written by . This book was released on 2004. Available in PDF, EPUB and Kindle. Book excerpt: From May 11--15, 2004, the Institute for Mathematics and its Applications held a hot topics workshop on Compatible Spatial Discretizations for Partial Differential Equations. The numerical solution of partial differential equations (PDE) is a fundamental task in science and engineering. The goal of the workshop was to bring together a spectrum of scientists at the forefront of the research in the numerical solution of PDEs to discuss compatible spatial discretizations. We define compatible spatial discretizations as those that inherit or mimic fundamental properties of the PDE such as topology, conservation, symmetries, and positivity structures and maximum principles. A wide variety of discretization methods applied across a wide range of scientific and engineering applications have been designed to or found to inherit or mimic intrinsic spatial structure and reproduce fundamental properties of the solution of the continuous PDE model at the finite dimensional level. A profusion of such methods and concepts relevant to understanding them have been developed and explored: mixed finite element methods, mimetic finite differences, support operator methods, control volume methods, discrete differential forms, Whitney forms, conservative differencing, discrete Hodge operators, discrete Helmholtz decomposition, finite integration techniques, staggered grid and dual grid methods, etc. This workshop seeks to foster communication among the diverse groups of researchers designing, applying, and studying such methods as well as researchers involved in practical solution of large scale problems that may benefit from advancements in such discretizations; to help elucidate the relations between the different methods and concepts; and to generally advance our understanding in the area of compatible spatial discretization methods for PDE. Particular points of emphasis included: + Identification of intrinsic properties of PDE models that are critical for the fidelity of numerical simulations. + Identification and design of compatible spatial discretizations of PDEs, their classification, analysis, and relations. + Relationships between different compatible spatial discretization methods and concepts which have been developed; + Impact of compatible spatial discretizations upon physical fidelity, verification and validation of simulations, especially in large-scale, multiphysics settings. + How solvers address the demands placed upon them by compatible spatial discretizations. This report provides information about the program and abstracts of all the presentations.

Compatible Spatial Discretizations

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Author :
Release : 2008-11-01
Genre : Mathematics
Kind : eBook
Book Rating : 535/5 ( reviews)

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Book Synopsis Compatible Spatial Discretizations by : Douglas N. Arnold

Download or read book Compatible Spatial Discretizations written by Douglas N. Arnold. This book was released on 2008-11-01. Available in PDF, EPUB and Kindle. Book excerpt: The IMA Hot Topics workshop on compatible spatialdiscretizations was held in 2004. This volume contains original contributions based on the material presented there. A unique feature is the inclusion of work that is representative of the recent developments in compatible discretizations across a wide spectrum of disciplines in computational science. Abstracts and presentation slides from the workshop can be accessed on the internet.

A Study of Spatial and Time Discretizations for Discontinuous Galerkin Methods

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Author :
Release : 2009
Genre : Galerkin methods
Kind : eBook
Book Rating : 692/5 ( reviews)

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Book Synopsis A Study of Spatial and Time Discretizations for Discontinuous Galerkin Methods by : Arunasalam Rahunanthan

Download or read book A Study of Spatial and Time Discretizations for Discontinuous Galerkin Methods written by Arunasalam Rahunanthan. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation consists of two different research efforts. In the first one, a new approach to the treatment of viscous flux in the context of discontinuous Galerkin spatial discretization is addressed. In the second part of the dissertation, an approach to constructing high-order W -methods is discussed. In the first part of the dissertation, a study of boundary and interface conditions for discontinuous Galerkin approximations of fluid flow equations is undertaken. While the interface flux for the inviscid case is usually computed by approximate Riemann solvers, most discretizations of the Navier-Stokes equations use an average of the viscous fluxes from neighboring elements. A methodology for constructing a set of stable boundary/interface conditions that can be thought of as "viscous" Riemann solvers and are compatible with the inviscid limit is presented. In the second part, we turn our attention to temporal discretizations. Implicit methods are the natural choice for solving stiff systems of ODEs. Rosenbrock methods are a class of linear implicit methods for solving such stiff systems of ODEs. In the Rosenbrock methods the exact Jacobian must be evaluated at every step. These evaluations can make the computations costly. By contrast, W -methods use only occasional calculations of the Jacobian matrix. This makes the W-methods popular among the class of linear implicit methods for numerical solution of stiff ODEs. However the price one has to pay is the large amount of work needed to find the coefficients of the W -methods. As the order of the W -methods increases, the number of order conditions of the W-methods increases very fast. This makes the design of high-order W-methods difficult. In the second part, an approach to constructing high-order W -methods is given.

Bio-Inspired Artificial Intelligence

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Release : 2023-04-04
Genre : Computers
Kind : eBook
Book Rating : 732/5 ( reviews)

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Book Synopsis Bio-Inspired Artificial Intelligence by : Dario Floreano

Download or read book Bio-Inspired Artificial Intelligence written by Dario Floreano. This book was released on 2023-04-04. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to new approaches in artificial intelligence and robotics that are inspired by self-organizing biological processes and structures. New approaches to artificial intelligence spring from the idea that intelligence emerges as much from cells, bodies, and societies as it does from evolution, development, and learning. Traditionally, artificial intelligence has been concerned with reproducing the abilities of human brains; newer approaches take inspiration from a wider range of biological structures that that are capable of autonomous self-organization. Examples of these new approaches include evolutionary computation and evolutionary electronics, artificial neural networks, immune systems, biorobotics, and swarm intelligence—to mention only a few. This book offers a comprehensive introduction to the emerging field of biologically inspired artificial intelligence that can be used as an upper-level text or as a reference for researchers. Each chapter presents computational approaches inspired by a different biological system; each begins with background information about the biological system and then proceeds to develop computational models that make use of biological concepts. The chapters cover evolutionary computation and electronics; cellular systems; neural systems, including neuromorphic engineering; developmental systems; immune systems; behavioral systems—including several approaches to robotics, including behavior-based, bio-mimetic, epigenetic, and evolutionary robots; and collective systems, including swarm robotics as well as cooperative and competitive co-evolving systems. Chapters end with a concluding overview and suggested reading.

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