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A Galerkin strategy with Proper Orthogonal Decomposition forparameter-dependent problems – Analysis, assessments and applications to parameterestimation

Published online by Cambridge University Press:  07 October 2013

D. Chapelle
Affiliation:
Inria Saclay Ile-de-France, Palaiseau, France.. dominique.chapelle@inria.fr
A. Gariah
Affiliation:
Inria Paris-Rocquencourt, Le Chesnay, France.
P. Moireau
Affiliation:
Inria Saclay Ile-de-France, Palaiseau, France.. dominique.chapelle@inria.fr
J. Sainte-Marie
Affiliation:
Inria Paris-Rocquencourt, Le Chesnay, France.Université Paris 6, CNRS UMR 7598, Laboratoire Jacques-Louis Lions, Paris, France.CETMEF, Margny-les-Compiègne, France.

Abstract

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We address the issue of parameter variations in POD approximations of time-dependentproblems, without any specific restriction on the form of parameter dependence.Considering a parabolic model problem, we propose a POD construction strategy allowing usto obtain some a priori error estimates controlled by the POD remainder –in the construction procedure – and some parameter-wise interpolation errors for the modelsolutions. We provide a thorough numerical assessment of this strategy with theFitzHugh − Nagumo 1D model. Finally, we give detailed illustrations of the approach in twoparameter estimation applications, the first in a variational estimation framework withthe FitzHugh − Nagumo model, and the second with a beating heart mechanical model forwhich we employ a sequential estimation method to characterize model parameters using realimage data in a clinical case.

Information

Type
Research Article
Copyright
© EDP Sciences, SMAI 2013