Proper Orthogonal Decomposition Methods for Partial Differential Equations

Proper Orthogonal Decomposition Methods for Partial Differential Equations
Author: Zhendong Luo,Goong Chen
Publsiher: Academic Press
Total Pages: 278
Release: 2018-11-26
ISBN 10: 0128167998
ISBN 13: 9780128167991
Language: EN, FR, DE, ES & NL

Proper Orthogonal Decomposition Methods for Partial Differential Equations Book Review:

Proper Orthogonal Decomposition Methods for Partial Differential Equations evaluates the potential applications of POD reduced-order numerical methods in increasing computational efficiency, decreasing calculating load and alleviating the accumulation of truncation error in the computational process. Introduces the foundations of finite-differences, finite-elements and finite-volume-elements. Models of time-dependent PDEs are presented, with detailed numerical procedures, implementation and error analysis. Output numerical data are plotted in graphics and compared using standard traditional methods. These models contain parabolic, hyperbolic and nonlinear systems of PDEs, suitable for the user to learn and adapt methods to their own R&D problems. Explains ways to reduce order for PDEs by means of the POD method so that reduced-order models have few unknowns Helps readers speed up computation and reduce computation load and memory requirements while numerically capturing system characteristics Enables readers to apply and adapt the methods to solve similar problems for PDEs of hyperbolic, parabolic and nonlinear types

Incremental Proper Orthogonal Decomposition for PDE Simulation Data

Incremental Proper Orthogonal Decomposition for PDE Simulation Data
Author: Anonim
Publsiher: Unknown
Total Pages: 329
Release: 2018
ISBN 10:
ISBN 13: OCLC:1051408139
Language: EN, FR, DE, ES & NL

Incremental Proper Orthogonal Decomposition for PDE Simulation Data Book Review:

Abstract: We propose an incremental algorithm to compute the proper orthogonal decomposition (POD) of simulation data for a partial differential equation. Specifically, we modify an incremental matrix SVD algorithm of Brand to accommodate data arising from Galerkin-type simulation methods for time dependent PDEs. The algorithm is applicable to data generated by many numerical methods for PDEs, including finite element and discontinuous Galerkin methods. The algorithm initializes and efficiently updates the dominant POD eigenvalues and modes during the time stepping in a PDE solver without storing the simulation data. We prove that the algorithm without truncation updates the POD exactly. We demonstrate the effectiveness of the algorithm using finite element computations for a 1D Burgers' equation and a 2D Navier–Stokes problem.

Reduced Basis Methods for Partial Differential Equations

Reduced Basis Methods for Partial Differential Equations
Author: Alfio Quarteroni,Andrea Manzoni,Federico Negri
Publsiher: Springer
Total Pages: 296
Release: 2015-08-19
ISBN 10: 3319154311
ISBN 13: 9783319154312
Language: EN, FR, DE, ES & NL

Reduced Basis Methods for Partial Differential Equations Book Review:

This book provides a basic introduction to reduced basis (RB) methods for problems involving the repeated solution of partial differential equations (PDEs) arising from engineering and applied sciences, such as PDEs depending on several parameters and PDE-constrained optimization. The book presents a general mathematical formulation of RB methods, analyzes their fundamental theoretical properties, discusses the related algorithmic and implementation aspects, and highlights their built-in algebraic and geometric structures. More specifically, the authors discuss alternative strategies for constructing accurate RB spaces using greedy algorithms and proper orthogonal decomposition techniques, investigate their approximation properties and analyze offline-online decomposition strategies aimed at the reduction of computational complexity. Furthermore, they carry out both a priori and a posteriori error analysis. The whole mathematical presentation is made more stimulating by the use of representative examples of applicative interest in the context of both linear and nonlinear PDEs. Moreover, the inclusion of many pseudocodes allows the reader to easily implement the algorithms illustrated throughout the text. The book will be ideal for upper undergraduate students and, more generally, people interested in scientific computing. All these pseudocodes are in fact implemented in a MATLAB package that is freely available at https://github.com/redbkit

Model Reduction and Approximation

Model Reduction and Approximation
Author: Peter Benner,Albert Cohen,Mario Ohlberger,Karen Willcox
Publsiher: SIAM
Total Pages: 412
Release: 2017-07-06
ISBN 10: 1611974828
ISBN 13: 9781611974829
Language: EN, FR, DE, ES & NL

Model Reduction and Approximation Book Review:

Many physical, chemical, biomedical, and technical processes can be described by partial differential equations or dynamical systems. In spite of increasing computational capacities, many problems are of such high complexity that they are solvable only with severe simplifications, and the design of efficient numerical schemes remains a central research challenge. This book presents a tutorial introduction to recent developments in mathematical methods for model reduction and approximation of complex systems. Model Reduction and Approximation: Theory and Algorithms contains three parts that cover (I) sampling-based methods, such as the reduced basis method and proper orthogonal decomposition, (II) approximation of high-dimensional problems by low-rank tensor techniques, and (III) system-theoretic methods, such as balanced truncation, interpolatory methods, and the Loewner framework. It is tutorial in nature, giving an accessible introduction to state-of-the-art model reduction and approximation methods. It also covers a wide range of methods drawn from typically distinct communities (sampling based, tensor based, system-theoretic).?? This book is intended for researchers interested in model reduction and approximation, particularly graduate students and young researchers.

Proper Orthogonal Decomposition in Optimal Control of Fluids

Proper Orthogonal Decomposition in Optimal Control of Fluids
Author: National Aeronautics and Space Administration (NASA)
Publsiher: Createspace Independent Publishing Platform
Total Pages: 30
Release: 2018-06-03
ISBN 10: 9781720667094
ISBN 13: 1720667098
Language: EN, FR, DE, ES & NL

Proper Orthogonal Decomposition in Optimal Control of Fluids Book Review:

In this article, we present a reduced order modeling approach suitable for active control of fluid dynamical systems based on proper orthogonal decomposition (POD). The rationale behind the reduced order modeling is that numerical simulation of Navier-Stokes equations is still too costly for the purpose of optimization and control of unsteady flows. We examine the possibility of obtaining reduced order models that reduce computational complexity associated with the Navier-Stokes equations while capturing the essential dynamics by using the POD. The POD allows extraction of certain optimal set of basis functions, perhaps few, from a computational or experimental data-base through an eigenvalue analysis. The solution is then obtained as a linear combination of these optimal set of basis functions by means of Galerkin projection. This makes it attractive for optimal control and estimation of systems governed by partial differential equations. We here use it in active control of fluid flows governed by the Navier-Stokes equations. We show that the resulting reduced order model can be very efficient for the computations of optimization and control problems in unsteady flows. Finally, implementational issues and numerical experiments are presented for simulations and optimal control of fluid flow through channels.Ravindran, S. S.Langley Research CenterNAVIER-STOKES EQUATION; TURBULENT FLOW; OPTIMAL CONTROL; UNSTEADY FLOW; ACTIVE CONTROL; FLUID FLOW; GALERKIN METHOD; PARTIAL DIFFERENTIAL EQUATIONS; ORTHOGONAL FUNCTIONS; DYNAMICAL SYSTEMS; EIGENVALUES; SIMULATION; MODELS

Certified Reduced Basis Methods for Parametrized Partial Differential Equations

Certified Reduced Basis Methods for Parametrized Partial Differential Equations
Author: Jan S Hesthaven,Gianluigi Rozza,Benjamin Stamm
Publsiher: Springer
Total Pages: 131
Release: 2015-08-20
ISBN 10: 3319224700
ISBN 13: 9783319224701
Language: EN, FR, DE, ES & NL

Certified Reduced Basis Methods for Parametrized Partial Differential Equations Book Review:

This book provides a thorough introduction to the mathematical and algorithmic aspects of certified reduced basis methods for parametrized partial differential equations. Central aspects ranging from model construction, error estimation and computational efficiency to empirical interpolation methods are discussed in detail for coercive problems. More advanced aspects associated with time-dependent problems, non-compliant and non-coercive problems and applications with geometric variation are also discussed as examples.

Constrained Optimization and Optimal Control for Partial Differential Equations

Constrained Optimization and Optimal Control for Partial Differential Equations
Author: Günter Leugering,Sebastian Engell,Andreas Griewank,Michael Hinze,Rolf Rannacher,Volker Schulz,Michael Ulbrich,Stefan Ulbrich
Publsiher: Springer Science & Business Media
Total Pages: 624
Release: 2012-01-03
ISBN 10: 3034801335
ISBN 13: 9783034801331
Language: EN, FR, DE, ES & NL

Constrained Optimization and Optimal Control for Partial Differential Equations Book Review:

This special volume focuses on optimization and control of processes governed by partial differential equations. The contributors are mostly participants of the DFG-priority program 1253: Optimization with PDE-constraints which is active since 2006. The book is organized in sections which cover almost the entire spectrum of modern research in this emerging field. Indeed, even though the field of optimal control and optimization for PDE-constrained problems has undergone a dramatic increase of interest during the last four decades, a full theory for nonlinear problems is still lacking. The contributions of this volume, some of which have the character of survey articles, therefore, aim at creating and developing further new ideas for optimization, control and corresponding numerical simulations of systems of possibly coupled nonlinear partial differential equations. The research conducted within this unique network of groups in more than fifteen German universities focuses on novel methods of optimization, control and identification for problems in infinite-dimensional spaces, shape and topology problems, model reduction and adaptivity, discretization concepts and important applications. Besides the theoretical interest, the most prominent question is about the effectiveness of model-based numerical optimization methods for PDEs versus a black-box approach that uses existing codes, often heuristic-based, for optimization.

Proper Orthogonal Decomposition in Optimal Control of Fluids

Proper Orthogonal Decomposition in Optimal Control of Fluids
Author: S. S. Ravindran
Publsiher: Unknown
Total Pages: 30
Release: 1999
ISBN 10:
ISBN 13: NASA:31769000632292
Language: EN, FR, DE, ES & NL

Proper Orthogonal Decomposition in Optimal Control of Fluids Book Review:

Separated Representations and PGD Based Model Reduction

Separated Representations and PGD Based Model Reduction
Author: Francisco Chinesta,Pierre Ladevèze
Publsiher: Springer
Total Pages: 227
Release: 2014-09-02
ISBN 10: 3709117941
ISBN 13: 9783709117941
Language: EN, FR, DE, ES & NL

Separated Representations and PGD Based Model Reduction Book Review:

The papers in this volume start with a description of the construction of reduced models through a review of Proper Orthogonal Decomposition (POD) and reduced basis models, including their mathematical foundations and some challenging applications, then followed by a description of a new generation of simulation strategies based on the use of separated representations (space-parameters, space-time, space-time-parameters, space-space,...), which have led to what is known as Proper Generalized Decomposition (PGD) techniques. The models can be enriched by treating parameters as additional coordinates, leading to fast and inexpensive online calculations based on richer offline parametric solutions. Separated representations are analyzed in detail in the course, from their mathematical foundations to their most spectacular applications. It is also shown how such an approximation could evolve into a new paradigm in computational science, enabling one to circumvent various computational issues in a vast array of applications in engineering science.

Trust region Proper Orthogonal Decomposition for Flow Control

Trust region Proper Orthogonal Decomposition for Flow Control
Author: E. Arian,Institute for Computer Applications in Science and Engineering
Publsiher: Unknown
Total Pages: 18
Release: 2000
ISBN 10:
ISBN 13: NASA:31769000711625
Language: EN, FR, DE, ES & NL

Trust region Proper Orthogonal Decomposition for Flow Control Book Review:

The proper orthogonal decomposition (POD) is a model reduction technique for the simulation of physical processes governed by partial differential equations, e.g., fluid flows. It can also be used to develop reduced order control models. Fundamental is the computation of POD basis functions that represent the influence of the control action on the system in order to get a suitable control model. We present an approach where suitable reduced order models are derived successively and give global convergence results.

Real Time PDE Constrained Optimization

Real Time PDE Constrained Optimization
Author: Lorenz T. Biegler,Omar Ghattas,Matthias Heinkenschloss,David Keyes,Bart van Bloemen Waanders
Publsiher: SIAM
Total Pages: 312
Release: 2007-07-12
ISBN 10: 0898716217
ISBN 13: 9780898716214
Language: EN, FR, DE, ES & NL

Real Time PDE Constrained Optimization Book Review:

“…a timely contribution to a field of growing importance. This carefully edited book presents a rich collection of chapters ranging from mathematical methodology to emerging applications. I recommend it to students as a rigorous and comprehensive presentation of simulation-based optimization and to researchers as an overview of recent advances and challenges in the field.” — Jorge Nocedal, Professor, Northwestern University.Many engineering and scientific problems in design, control, and parameter estimation can be formulated as optimization problems that are governed by partial differential equations (PDEs). The complexities of the PDEs—and the requirement for rapid solution—pose significant difficulties. A particularly challenging class of PDE-constrained optimization problems is characterized by the need for real-time solution, i.e., in time scales that are sufficiently rapid to support simulation-based decision making. Real-Time PDE-Constrained Optimization, the first book devoted to real-time optimization for systems governed by PDEs, focuses on new formulations, methods, and algorithms needed to facilitate real-time, PDE-constrained optimization. In addition to presenting state-of-the-art algorithms and formulations, the text illustrates these algorithms with a diverse set of applications that includes problems in the areas of aerodynamics, biology, fluid dynamics, medicine, chemical processes, homeland security, and structural dynamics. Despite difficulties, there is a pressing need to capitalize on continuing advances in computing power to develop optimization methods that will replace simple rule-based decision making with optimized decisions based on complex PDE simulations. Audience The book is aimed at readers who have expertise in simulation and are interested in incorporating optimization into their simulations, who have expertise in numerical optimization and are interested in adapting optimization methods to the class of infinite-dimensional simulation problems, or who have worked in “offline” optimization contexts and are interested in moving to “online” optimization.Contents Preface; Part I: Concepts and Properties of Real-Time, Online Strategies. Chapter 1: Constrained Optimal Feedback Control of Systems Governed by Large Differential Algebraic Equations; Chapter 2: A Stabilizing Real-Time Implementation of Nonlinear Model Predictive Control; Chapter 3: Numerical Feedback Controller Design for PDE Systems Using Model Reduction: Techniques and Case Studies; Chapter 4: Least-Squares Finite Element Method for Optimization and Control Problems; Part II: Fast PDE-Constrained Optimization Solvers. Chapter 5: Space-Time Multigrid Methods for Solving Unsteady Optimal Control Problems; Chapter 6: A Time-Parallel Implicit Methodology for the Near-Real-Time Solution of Systems of Linear Oscillators; Chapter 7: Generalized SQP Methods with “Parareal” Time-Domain Decomposition for Time-Dependent PDE-Constrained Optimization; Chapter 8: Simultaneous Pseudo-Timestepping for State-Constrained Optimization Problems in Aerodynamics; Chapter 9: Digital Filter Stepsize Control in DASPK and Its Effect on Control Optimization Performance; Part III: Reduced Order Modeling. Chapter 10: Certified Rapid Solution of Partial Differential Equations for Real-Time Parameter Estimation and Optimization; Chapter 11: Model Reduction for Large-Scale Applications in Computational Fluid Dynamics; Chapter 12: Suboptimal Feedback Control of Flow Separation by POD Model Reduction; Part IV: Applications. Chapter 13: A Combined Shape-Newton and Topology Optimization Technique in Real-Time Image Segmentation; Chapter 14: COFIR: Coarse and Fine Image Registration; Chapter 15: Real-Time, Large Scale Optimization of Water Network Systems Using a Sub-domain Approach; Index.

Control and Estimation of Distributed Parameter Systems

Control and Estimation of Distributed Parameter Systems
Author: Wolfgang Desch,Gertrud Desch,Franz Kappel,Karl Kunisch
Publsiher: Springer Science & Business Media
Total Pages: 269
Release: 2003
ISBN 10: 9783764370046
ISBN 13: 3764370041
Language: EN, FR, DE, ES & NL

Control and Estimation of Distributed Parameter Systems Book Review:

Consisting of 16 refereed original contributions, this volume presents a diversified collection of recent results in control of distributed parameter systems, including applications in fluid mechanics, partial differential equations, perturbation theory and shape optimization. Advanced graduate students and researchers will find the book an excellent guide to the forefront of control and estimation of distributed pa

Model Order Reduction Theory Research Aspects and Applications

Model Order Reduction  Theory  Research Aspects and Applications
Author: Wilhelmus H. Schilders,Henk A. van der Vorst,Joost Rommes
Publsiher: Springer Science & Business Media
Total Pages: 471
Release: 2008-08-27
ISBN 10: 3540788417
ISBN 13: 9783540788416
Language: EN, FR, DE, ES & NL

Model Order Reduction Theory Research Aspects and Applications Book Review:

The idea for this book originated during the workshop “Model order reduction, coupled problems and optimization” held at the Lorentz Center in Leiden from S- tember 19–23, 2005. During one of the discussion sessions, it became clear that a book describing the state of the art in model order reduction, starting from the very basics and containing an overview of all relevant techniques, would be of great use for students, young researchers starting in the ?eld, and experienced researchers. The observation that most of the theory on model order reduction is scattered over many good papers, making it dif?cult to ?nd a good starting point, was supported by most of the participants. Moreover, most of the speakers at the workshop were willing to contribute to the book that is now in front of you. The goal of this book, as de?ned during the discussion sessions at the workshop, is three-fold: ?rst, it should describe the basics of model order reduction. Second, both general and more specialized model order reduction techniques for linear and nonlinear systems should be covered, including the use of several related numerical techniques. Third, the use of model order reduction techniques in practical appli- tions and current research aspects should be discussed. We have organized the book according to these goals. In Part I, the rationale behind model order reduction is explained, and an overview of the most common methods is described.

Proceedings

Proceedings
Author: Anonim
Publsiher: Unknown
Total Pages: 520
Release: 2002
ISBN 10:
ISBN 13: STANFORD:36105124274395
Language: EN, FR, DE, ES & NL

Proceedings Book Review:

Trends in PDE Constrained Optimization

Trends in PDE Constrained Optimization
Author: Günter Leugering,Peter Benner,Sebastian Engell,Andreas Griewank,Helmut Harbrecht,Michael Hinze,Rolf Rannacher,Stefan Ulbrich
Publsiher: Springer
Total Pages: 543
Release: 2014-12-22
ISBN 10: 3319050834
ISBN 13: 9783319050836
Language: EN, FR, DE, ES & NL

Trends in PDE Constrained Optimization Book Review:

Optimization problems subject to constraints governed by partial differential equations (PDEs) are among the most challenging problems in the context of industrial, economical and medical applications. Almost the entire range of problems in this field of research was studied and further explored as part of the Deutsche Forschungsgemeinschaft (DFG) priority program 1253 on “Optimization with Partial Differential Equations” from 2006 to 2013. The investigations were motivated by the fascinating potential applications and challenging mathematical problems that arise in the field of PDE constrained optimization. New analytic and algorithmic paradigms have been developed, implemented and validated in the context of real-world applications. In this special volume, contributions from more than fifteen German universities combine the results of this interdisciplinary program with a focus on applied mathematics. The book is divided into five sections on “Constrained Optimization, Identification and Control”, “Shape and Topology Optimization”, “Adaptivity and Model Reduction”, “Discretization: Concepts and Analysis” and “Applications”. Peer-reviewed research articles present the most recent results in the field of PDE constrained optimization and control problems. Informative survey articles give an overview of topics that set sustainable trends for future research. This makes this special volume interesting not only for mathematicians, but also for engineers and for natural and medical scientists working on processes that can be modeled by PDEs.

SIAM Journal on Scientific Computing

SIAM Journal on Scientific Computing
Author: Anonim
Publsiher: Unknown
Total Pages: 329
Release: 2009
ISBN 10:
ISBN 13: UCSD:31822036925279
Language: EN, FR, DE, ES & NL

SIAM Journal on Scientific Computing Book Review:

Discussiones Mathematicae

Discussiones Mathematicae
Author: Anonim
Publsiher: Unknown
Total Pages: 329
Release: 2006
ISBN 10:
ISBN 13: UOM:39015081659628
Language: EN, FR, DE, ES & NL

Discussiones Mathematicae Book Review:

Large Scale PDE Constrained Optimization

Large Scale PDE Constrained Optimization
Author: Lorenz T. Biegler,Omar Ghattas,Matthias Heinkenschloss,Bart van Bloemen Waanders
Publsiher: Springer Science & Business Media
Total Pages: 349
Release: 2012-12-06
ISBN 10: 364255508X
ISBN 13: 9783642555084
Language: EN, FR, DE, ES & NL

Large Scale PDE Constrained Optimization Book Review:

Optimal design, optimal control, and parameter estimation of systems governed by partial differential equations (PDEs) give rise to a class of problems known as PDE-constrained optimization. The size and complexity of the discretized PDEs often pose significant challenges for contemporary optimization methods. With the maturing of technology for PDE simulation, interest has now increased in PDE-based optimization. The chapters in this volume collectively assess the state of the art in PDE-constrained optimization, identify challenges to optimization presented by modern highly parallel PDE simulation codes, and discuss promising algorithmic and software approaches for addressing them. These contributions represent current research of two strong scientific computing communities, in optimization and PDE simulation. This volume merges perspectives in these two different areas and identifies interesting open questions for further research.

Grazer mathematische Berichte

Grazer mathematische Berichte
Author: Anonim
Publsiher: Unknown
Total Pages: 329
Release: 1999
ISBN 10:
ISBN 13: UOM:39015053987957
Language: EN, FR, DE, ES & NL

Grazer mathematische Berichte Book Review:

Reduced Order Methods for Modeling and Computational Reduction

Reduced Order Methods for Modeling and Computational Reduction
Author: Alfio Quarteroni,Gianluigi Rozza
Publsiher: Springer
Total Pages: 334
Release: 2014-06-05
ISBN 10: 3319020900
ISBN 13: 9783319020907
Language: EN, FR, DE, ES & NL

Reduced Order Methods for Modeling and Computational Reduction Book Review:

This monograph addresses the state of the art of reduced order methods for modeling and computational reduction of complex parametrized systems, governed by ordinary and/or partial differential equations, with a special emphasis on real time computing techniques and applications in computational mechanics, bioengineering and computer graphics. Several topics are covered, including: design, optimization, and control theory in real-time with applications in engineering; data assimilation, geometry registration, and parameter estimation with special attention to real-time computing in biomedical engineering and computational physics; real-time visualization of physics-based simulations in computer science; the treatment of high-dimensional problems in state space, physical space, or parameter space; the interactions between different model reduction and dimensionality reduction approaches; the development of general error estimation frameworks which take into account both model and discretization effects. This book is primarily addressed to computational scientists interested in computational reduction techniques for large scale differential problems.