QL-Born迭代法电磁散射计算  

Electromagnetic Scattering Calculation Based on Iterative QL-Born Approximation

作　　者：赵连锋[1] 曹俊兴[1] 潘显军[1] 唐建光[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《计算物理》2003年第2期169-172,共4页Chinese Journal of Computational Physics

基　　金：成都理工大学油气藏地质及开发工程国家重点实验室资助项目

摘　　要：　积分方程法是多维电磁响应的数值模拟和反演计算的有效方法之一.在线性化散射电磁场积分方程的基础上,采用迭代Born近似法进行了电导率成像反演.针对迭代Born近似法反演依赖初始模型,而QL近似法无需给定初值的特点,提出了两步法(QL Born迭代法),用QL近似法计算的结果作为Born迭代法的初始模型,避免人为设置初值,并进行了数值实验.Integral equation method is one of effective methods of numerical simulation and inversion calculation for multidimensional electromagnetic response.Based on the linearization of the scattering electromagnetic integral equation,conductance imaging using iterative Born approximation is effective.Aiming at the characteristics that iterative Born approximation inversion depends on the initial model and that QL approximation doesn't need initial value,the two step method,iterative QLBorn approximation method,is put forward,which takes the result of QL inversion as the initial model of the iterative Born approximation method and avoids contrived initialization.The iterative QLBorn approximation method is effective and testified by numerical experiments.

关 键 词：积分方程法 迭代Born近似 QL近似法 QL-Born迭代法 

分 类 号：O441.4[理学—电磁学] O242.1[理学—物理]