是以有限差分算法的MATLAB实现，可以运行的，给出谐振腔的场强的表示方法-finite diffenence time domain programmed by matlab language is for cavity, and its elelctro magnetic field can be showed.

利用位移-速度-应力交错网格有限差分方法进行一维粘弹性介质地震波场生成和模拟，对于做波场模拟的同学有很好的参考价值，更详细的介绍见英文描述。-The Fortran95 Computer Code for Finite-Difference Numerical Generation and Simulation of a 1D Seismic Wavefield in a 1D Heterogeneous Viscoelastic Medium Using the Displacement-Ve

一种平滑计算导数的方法,可通过参数的改变计算一阶导数二阶导数-A smoothing method to calculate the derivative can be calculated first derivative of the second derivative by changing the parameters of