کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5776139 1631963 2018 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Marching schemes for inverse scattering problems in waveguides with curved boundaries
ترجمه فارسی عنوان
طرح رانندگی برای مشکلات پراکندگی معکوس در موجبرها با مرزهای منحنی
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات ریاضیات کاربردی
چکیده انگلیسی
A marching scheme is developed for inverse scattering problems of the Helmholtz equation in waveguides with curved boundaries. We implement a local orthogonal transform to transform the irregular waveguide in physical plane into a regular rectangle in computing plane. Then the modified Helmholtz system in computational domain is piecewise solved through a second order numerical marching scheme, and we propose a spectral projector based on the truncated local propagating eigenfunction expansion to regularize the marching scheme. In the end, the marching scheme is verified by extensive numerical experiments, and it is shown that the scheme is efficient, stable and accurate in rapidly varying waveguides with curved boundaries, even when the number of propagating modes in the main propagation direction is variable.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Computational and Applied Mathematics - Volume 328, 15 January 2018, Pages 287-301
نویسندگان
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