一种连续模型二维地电构造大地电磁测深反演方法

A magnetotelluric inversion method for 2-D continuous geoelectric model,

本文是出一种连续模型二维地电构造的大地电磁测深资料的反演方法。首先,定义了二维反演问题的目标函数为F[λ]=sum form i=1 to M×N再给出两种不同极化方式反演问题的 Frechet 导函数。H 极化时的 Frechet 导函数为1/2QE 极化时的 Frechet 导函数为1/2Q然后用正则化了的广义逆方法求解上述两个线性积分方程。数值计算表明反演方法是稳定而有效的。

This paper describes a magnetotelluric inversion method for 2-D continuous geoelectric model.The objective function for 2-D inverse problem is defined as F[λ]=sum form i=1 to M×NFrechet derivatives for two polarization modes are given respectively. Frechet derivative for H polarization is (1/2)Q△ρ_i=1/V'Frechet derivative for E polarization is (1/2)Q△σ=-1/VThe two linear integral equations are solved using regularized genera- lized inverse method.Numerical calculation shows that this inversion method is stabte and efficient.