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- W2017312985 abstract "Based on the integral equation method and regularization theory, the regularized conjugate gradient method (RCGM) is presented for studying wave scattering from a one-dimensional rough surface with tapered wave incidence. This study is limited to scattering of acoustic waves from sound soft surfaces or horizontally polarized electromagnetic waves from perfectly conducting surfaces. The problem is formulated by using the integral equation approach. Compared with plane wave incidence, there is a remainder on the right side of the integral equation. To solve the surface integral equation, especially when the rough surface is very large in terms of the wavelength, we treat the large-scale matrix computation problem which is generated by the fast multipole algorithm using the RCGM. A strategy for the selection of the regularization parameter is obtained by estimating the double integral as a perturbed right-hand side of the integral equation. Energy conservation is considered simultaneously in the process of designing stopping criteria of the RCGM. By comparison of the numerical results of bistatic scattering coefficient (BSC) between RCGM and method of moments (MOM), the validity and accuracy of RCGM is verified. Numerical examples are also given to show the relationship between the scattering characteristic and surface roughness of the one-dimensional fractal rough surfaces." @default.
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- W2017312985 date "2013-01-01" @default.
- W2017312985 modified "2023-10-18" @default.
- W2017312985 title "Regularized conjugate gradient method with fast multipole acceleration for wave scattering from 1D fractal rough surface" @default.
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- W2017312985 doi "https://doi.org/10.1016/j.wavemoti.2012.06.005" @default.
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