Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.2/1933
Título: A hybrid method for two-dimensional crack reconstruction
Autor: Kress, Rainer
Serranho, Pedro
Palavras-chave: Inverse scattering problem
Crack
Hybrid method
Data: 2005
Editora: IOPSciece
Citação: Kress, Rainer; Serranho, Pedro - A hybrid method for two-dimensional crack reconstruction. "Inverse Problems" [Em linha]. ISSN 0266-5611 (Print) 1361-6420 (Online). Vol. 21, nº 2 (2005), p. 1-12
Resumo: We present a new method for solving the time-harmonic inverse scattering problem for sound-soft or perfectly conducting cracks in two dimensions. Our approach extends a method that was recently suggested by one of us for inverse obstacle scattering. It can be viewed as a hybrid between a regularized Newton iterationmethod applied to a nonlinear operator equation involving the operator that, for a fixed incident wave, maps the crack onto the far-field pattern of the scattered wave and a decomposition method due to Kirsch and Kress. As an important feature, in contrast to the traditional Newton iterations for solving inverse scattering problems, our method does not require a forward solver for each iteration step. The theoretical background of the method is based on the minimization of a cost function containing an additional penalty term to deal with reconstructing the full crack. Numerical examples illustrate the feasibility of the method and its stability with respect to noisy data. We expect that the method can also be extended to sound-hard cracks.
Peer review: yes
URI: http://hdl.handle.net/10400.2/1933
ISSN: 0266-5611
1361-6420
Versão do Editor: http://iopscience.iop.org/0266-5611/21/2/020
doi:10.1088/0266-5611/21/2/020
Aparece nas colecções:Matemática e Estatística - Artigos em revistas internacionais / Papers in international journals

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