利用matlab软件和时域有限差分方法来算三维结构的程序，采用了周期边界条件-Using matlab software and finite difference time domain method to count three-dimensional structure of the program, using the periodic boundary condition

PSTD程序 已配置PML边界匹配条件，良好吸收回波，克服快速傅里叶变换造成的周期边界错误。-PSTD program is configured to match the PML boundary conditions, good to absorb echoes overcome periodic boundary error caused by fast Fourier transform.

数值分析中的三次样条插值算法，追赶法解方程算法的MATLAB实现函数和测试数据。样条插值算法支持一阶导数边界条件、二阶导数边界条件和周期边界条件三种不同边界条件类型。-Numerical analysis of the cubic spline interpolation algorithm, the catch-up method of solving equations algorithm in MATLAB functions and test data. Spline interpola