基于MATLAB编写的大地电磁二维有限单元法正演程序，矩形单元剖分，线性插值，
使用说明：
　　1.　运行MT2DMODEL.m构建正演模型
　　2.　运行TMmodel.m和TEmodel.m正演计算，计算结果自动保存
　　3.　程序进行了优化，并将BICGSTAB（稳定双共轭梯度法）用于求解线性方程组，求解效率提高，一般情况下正演计算仅需1~2秒(Based on MATLAB compiled two-dimensional magnetotelluric finite element forward program, rectangular element division, linear interpolation,

Instructions:

1. run MT2DMODEL.m to build forward modeling.

2. run TMmodel.m and TEmodel.m forward calculation, and calculate results automatically.

3. The program is optimized and BICGSTAB (stable double conjugate gradient method) is used to solve linear equations. The efficiency of solving linear equations is improved. Generally, the forward calculation takes only 1-2 seconds.)