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声波阻尼系数的反演方法
引用本文:杨阿莉,王连堂,李晓华.声波阻尼系数的反演方法[J].高等学校计算数学学报,2009,31(2).
作者姓名:杨阿莉  王连堂  李晓华
作者单位:1. 西安工程大学理学院,西安,710048
2. 西北大学数学系,西安,710069
3. 西安科技大学理学院,西安,710054
基金项目:国家自然科学基金项目,西安工程大学基础研究项目 
摘    要:1引言 声波反散射理论在雷达、声纳及地球物理勘探等领域有着广泛的应用前景,因此反散射理论及计算方法的研究获得了国内外众多专家学者的重视,对其大量研究见1-5].文5]中采用单层位势对散射波进行逼近,由给定的散射波的远场模式来反演阻尼系数.

关 键 词:入射波  远场模式  正则化参数  收敛性分析  参数化  反演方法  双层位势  声波  阻尼系数  散射波  

THE METHOD FOR RECOVERING BOUNDARY IMPEDANCE COEFFICIENT
Yang Ali,Wang Liantang,Li Xiaohua.THE METHOD FOR RECOVERING BOUNDARY IMPEDANCE COEFFICIENT[J].Numerical Mathematics A Journal of Chinese Universities,2009,31(2).
Authors:Yang Ali  Wang Liantang  Li Xiaohua
Institution:Yang Ali (School of Science,Xi'an Polytechnic University,Xi'an 710048) Wang Liantang (Mathematics Department of Northwest University,Xi'an 710069) Li Xiaohua (School of Science,Xi'an University of Science and Technology,Xi'an 710054)
Abstract:This paper considers the inverse scattering problem for time-harmonic acoustic waves in R~2 with impedance-type boundary.Single- and double- layer potential are combined to approximate the scattered waves and to recover the impedance coefficient from the far field pattern.A fully discrete method for the numerical solution of the hyper-singular operation is given.An approximate method is presented and the convergence of this method is proven.Numerical examples are given to show that this method is both accur...
Keywords:impedance coefficient  recover  far field pattern    
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