Application of the factorization method to retrieve a crack from near field data

Application of the factorization method to retrieve a crack from near field data
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应用因式分解方法从近场数据中检索裂纹

DOI:
10.1515/jiip-2014-0073
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发表时间:
2015
影响因子:
1.1
通讯作者:
Yan Guozheng
Yan Guozheng
中科院分区:
数学4区
文献类型:
--
作者:
Guo Jun;Hu Junhao;Yan Guozheng

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本文研究了由位于含裂纹封闭曲线上的点源复共轭确定裂纹形状的逆散射问题。建立了近场因子分解方法,利用同一条曲线上的测量数据重建裂纹。然后,我们推导出一个反演算法,并给出了一些数值例子来证明我们的方法的可行性。就目前所知,当入射波为点源时,近场算子不能直接分解为因式分解法所要求的形式。然而,我们通过点源的复共轭克服了这一困难,这些点源最近在[逆问题30(2014),文章ID 095005],[逆问题30(2014),文章ID 045008]中用于证明近场数据的因子分解方法。
Abstract We consider the inverse scattering problem of determining the shape of a crack with impedance boundary condition on one side from the complex conjugate of point sources placed on a closed curve which contains the crack. The near field factorization method is established to reconstruct the crack from the measurements on the same curve. Then, we deduce an inversion algorithm and present some numerical examples to show the viability of our method. So far as we know, when the incident waves are the point sources, the near field operator cannot be directly decomposed into the form that the factorization method required. However, we overcome this difficulty with the complex conjugate of point sources which are recently used in [Inverse Problems 30 (2014), Article ID 095005], [Inverse Problems 30 (2014), Article ID 045008] for the justification of the factorization method from near field data.
DOI: 10.1093/acprof:oso/9780199213535.001.0001
发表时间: 2007-12
期刊: --
影响因子: --
作者:
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通讯作者: A. Kirsch;N. Grinberg
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