Regularization of Ill-Posed Problems by Iteration Methods / Edition 1

Regularization of Ill-Posed Problems by Iteration Methods / Edition 1

ISBN-10:
0792361318
ISBN-13:
9780792361312
Pub. Date:
12/31/1999
Publisher:
Springer Netherlands
ISBN-10:
0792361318
ISBN-13:
9780792361312
Pub. Date:
12/31/1999
Publisher:
Springer Netherlands
Regularization of Ill-Posed Problems by Iteration Methods / Edition 1

Regularization of Ill-Posed Problems by Iteration Methods / Edition 1

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Overview

Iteration regularization, i.e., utilization of iteration methods of any form for the stable approximate solution of ill-posed problems, is one of the most important but still insufficiently developed topics of the new theory of ill-posed problems. In this monograph, a general approach to the justification of iteration regulari­ zation algorithms is developed, which allows us to consider linear and nonlinear methods from unified positions. Regularization algorithms are the 'classical' iterative methods (steepest descent methods, conjugate direction methods, gradient projection methods, etc.) complemented by the stopping rule depending on level of errors in input data. They are investigated for solving linear and nonlinear operator equations in Hilbert spaces. Great attention is given to the choice of iteration index as the regularization parameter and to estimates of errors of approximate solutions. Stabilizing properties such as smoothness and shape constraints imposed on the solution are used. On the basis of these investigations, we propose and establish efficient regularization algorithms for stable numerical solution of a wide class of ill-posed problems. In particular, descriptive regularization algorithms, utilizing a priori information about the qualitative behavior of the sought solution and ensuring a substantial saving in computational costs, are considered for model and applied problems in nonlinear thermophysics. The results of calculations for important applications in various technical fields (a continuous casting, the treatment of materials and perfection of heat-protective systems using laser and composite technologies) are given.

Product Details

ISBN-13: 9780792361312
Publisher: Springer Netherlands
Publication date: 12/31/1999
Series: Mathematics and Its Applications , #499
Edition description: 2000
Pages: 342
Product dimensions: 6.10(w) x 9.25(h) x 0.24(d)

Table of Contents

1 Regularizing Algorithms for Linear Ill-Posed Problems: Unified Approach.- 2 Iteration Steepest Descent Methods for Linear Operator Equations.- 3 Iteration Conjugate Direction Methods for Linear Operator Equations.- 4 Iteration Steepest Descent Methods for Nonlinear Operator Equations.- 5 Iteration Methods for Ill-Posed Constrained Minimization Problems.- 6 Descriptive Regularization Algorithms on the Basis of the Conjugate Gradient Projection Method.
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