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水平层状介质的地电模型计算问题．人们大都用快速汉克尔变换方法计算。其计算精度不高。本又应用半解析──—半有限元方法较高精度地计算了水平层状介质中的电磁场问题。本方法又称为混合法，它是数值解和解析解组合的方法、本文应用此方法是在纵向上采用数值解而在横向上采用解析解，即在纵向用有限元，在横向用贝塞尔方程。在计算过程中，应用了格林函数法，同时在数值解基函数的选取上，本文采用了既使原函数连续又使函数的一阶导数连续的基函数──—幅度、斜度基函数、计算结果的精度较以往用快速汉克尔变换法计算的精度大为提高。
Geoelectric model calculation of horizontal layered media. Most people use fast Hankel transformation method to calculate. The calculation accuracy is not high. This application of semi-analytic ─ ─ semi-finite element method to calculate the electromagnetic field in layered media with high accuracy. This method is also called hybrid method, which is a combination of numerical solution and analytical solution method. In this paper, we use the numerical solution in the longitudinal direction and the analytical solution in the horizontal direction. That is, using the finite element in the longitudinal direction, Equation. In the process of calculation, Green’s function method is applied. At the same time, in the selection of the basis function of numerical solution, we use the basis function of continuity of the first derivative of the function, The accuracy of the calculation results is much higher than the accuracy calculated by the rapid Hankel transformation in the past.