用C语言实现P-Q分解法潮流计算。其中用到了高斯消去法解矩阵方程，求修正的雅可比矩阵。-Using C language PQ decomposition method flow calculation. Which uses a Gaussian elimination method for solving matrix equations, find the modified Jacobian.

实现地震叠前三参数反演（纵波速度、横波速度、密度。本程序是基于matlab编写的。-Stack seismic inversion to achieve the first three parameters (P-wave velocity, shear wave velocity, density. This program is based on matlab prepared.