کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
499617 863053 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An operator marching method for inverse problems in range-dependent waveguides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
An operator marching method for inverse problems in range-dependent waveguides
چکیده انگلیسی

For large-scale inverse problems in acoustics and electromagnetics, numerical schemes based on direct methods, e.g. FEM and meshless methods, often result in huge linear systems, and thus are not feasible in terms of computing speed and memory storage. This work proposes the “inverse fundamental operator marching method” based on the Dirichlet-to-Neumann map for solving large-scale inverse boundary-value problems in range-dependent waveguides. Truncated singular value decomposition is employed to solve ill-conditioned linear systems arising in marching process, and the number of propagating modes in the waveguide assumes the role of a regularization parameter. Numerical results show that the method is computationally efficient, highly accurate, stable with respect to data noise for retrieving the propagating part of the starting field. It particularly suits to long-range wave propagation in slowly varying stratified waveguide.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 197, Issues 49–50, 15 September 2008, Pages 4077–4091
نویسندگان
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