摘要
本文在二维地电断面直流电测深法的边界单元法正演的基础上,将可行方向法引入LMF算法中,提出了改进的阻尼最小二乘可行方向法的二维电测深反演方法。同时,为了克服反演参数多、反演时间长的困难,本文使用了对反演参数进行抽样反演的方法,大大减少了反演参数。然后,采用拉格朗日插值法求出反演界面。最后,将以上方法用于二维起伏基底的电测深资料反演中。
On the basis of the forward solution of direct current electric resistivity sounded by using BEM on the two-dimensional geoelectrical section, this paper introduces the feasible direction method into LMF method and puts forward the inverse method of the electric resistivity sounded by the means of the LMF feasible direction method in two-dimensional geoelectrical section. At the same time,in order to overcome the difficulties of more inverse parameters and longer calculation of time, this paper uses the sampling inverse technique for inverting the parameters, thus reducing the inverse parameters greatly. Then, through the lagrangian interpotation, the writers can find the inverse boundary plane. At last, in this paper the method is used to calculate the inversion of electric resistivity sounded data in the two-dimensional undulate basis.
关键词
电测深法勘探
地电断面
反演
direct current electric resistivity, the LMF feasible direction method, the boundar element method, Jiacoby matix
