一种电色散媒质的改进对比源反演方法  

A Modified Contrast Source Inversion Method for Electrically Dispersive Media

作　　者：刘广东 张开银 LIU Guangdong;ZHANG Kaiyin(School of Electrical and Control Engineering,Nanjing Polytechnic Institute,Nanjing,Jiangsu 210048,China;College of Mechanical and Electrical Engineering,Wuyi University,Wuyishan,Fujian 354300,China)

机构地区：[1]南京科技职业学院电气与控制工程学院,江苏南京210048 [2]武夷学院机电工程学院,福建武夷山354300

出　　处：《计算物理》2022年第6期699-706,共8页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(51271059);南京科技职业学院自然科学基金(NJPI-2022-06)资助项目

摘　　要：基于一种单极德拜(Debye)经验模型,尝试改进其中的一种多频乘性正则化对比源反演方法,改进的主要思路是:从直接反演电参数差异,改进为间接反演4种频率无关的模型参数,即光频相对介电常数、相对介电常数差、静态电导率和弛豫时间。两个数值算例的仿真结果初步证实了改进方法的可行性和鲁棒性。Based on a single⁃pole Debye empirical formula,a multi frequency contrast source inversion(CSI)approach with a multiplicative regularization term is improved tentatively.The main improvement is a modification of inversion object from direct estimation of contrast between Debye scatterers and background medium to indirect reconstruction of four kinds of frequency⁃independent one⁃pole Debye model parameters,i.e.,the optical relative permittivity,relative permittivity difference,static conductivity,and relaxation time.Two numerical examples confirmed preliminarily feasibility and robustness of the improved method.

关 键 词：电磁逆散射 对比源反演 德拜色散媒质 乘性正则化 

分 类 号：TN95[电子电信—信号与信息处理] O441[电子电信—信息与通信工程] O451[理学—电磁学]