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arXiv 1706.06949math.NAcs.NA
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一种用于非线性点散射体反障碍散射问题的快速直接成像方法

A fast direct imaging method for the inverse obstacle scattering problem with nonlinear point scatterers

Zhejiang University(浙江大学);Taiyuan University of Technology(太原理工大学);Purdue University(普渡大学);Institute for Mathematics and its Applications, Minneapolis, MN 55455, USA(明尼苏达大学数学及其应用研究所)

Jun Lai, Ming Li, Peijun Li, Wei Li

AI总结:

本文提出一种基于FFT的直接成像方法,利用非线性点散射体产生高次谐波以提高成像分辨率,用于重构扩展障碍物的形状。

摘要:

考虑时间谐波平面波在由线性或非线性点散射体和扩展障碍物组成的非均匀介质中的散射。开发了一种广义的Foldy-Lax公式,以充分考虑复杂介质中的多重散射。提出了一种新的成像函数,并开发了一种基于FFT的直接成像方法,用于反障碍散射问题,即重构扩展障碍物的形状。新颖的想法是利用非线性点散射体激发高次谐波生成,以实现增强的成像分辨率。通过数值实验验证了所提方法的有效性。

英文摘要:

Consider the scattering of a time-harmonic plane wave by heterogeneous media consisting of linear or nonlinear point scatterers and extended obstacles. A generalized Foldy-Lax formulation is developed to take fully into account of the multiple scattering by the complex media. A new imaging function is proposed and an FFT-based direct imaging method is developed for the inverse obstacle scattering problem, which is to reconstruct the shape of the extended obstacles. The novel idea is to utilize the nonlinear point scatterers to excite high harmonic generation so that enhanced imaging resolution can be achieved. Numerical experiments are presented to demonstrate the effectiveness of the proposed method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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