FDTD3D_PEC

能够非线性函数的曲线拟合，包括一个Matlab的m文件和存有实验数据的txt文件。(Nonlinear function to the curve fitting, including a Matlab m-files and there are experimental data txt file.)

abaqus Umat 计算复合材料的损伤问题，可以学习一下(abaqus umat subroutine for damage of the composite material)

三角网格以及矩形网格剖分. 实现等参单元以及误差L H 范数收敛阶估计.(Triangular meshes and rectangular meshes are subdivided to achieve convergence order estimation of error L H norm.)

对于chebyshev法只能对于均匀线阵，本程序实现对任意结构阵列的波束优化(Chebyshev method for only the uniform linear array, the program structure of arbitrary beam array optimization)

计算回测程序，多因子选股模型，单因子测试(Calculation of back - test program, multi - factor stock - picking model, the single factor test)

有关ABAQUS计算多相材料的前处理器，包括网格划分及区域划分(ABAQUS calculation of multiphase material about previous processors, including mesh and zoning)

进行结构响应分析的Wilson法，是直接积分的基本算法之一，相信进行有限元动力分析编程的诸位都能用上(structural response analysis of Wilson, which is direct integration one of the basic algorithm, believe that the dynamic finite element analysis program you can use)

无网格算法中的光滑粒子水动力学sph算法源程序（溃坝）(Meshless algorithm smoothed particle hydrodynamics sph algorithm source (dam))

把 Maxwell 方程式在时间和空间领域上进行差分化。利用蛙跳式(Leap frog algorithm)--空间领域内的电场和磁场进行交替计算，通过时间领域上更新来模仿电磁场的变化，达到数值计算的目的。(The Maxwell equations in time and space on the field differencing. Using the leapfrog (Leap frog algorithm)- Space field for alternating electric and magnetic fields calculated by the time domain electromagnetic field is updated to mimic the changes to achieve the purpose of numerical calculation.)

最小二乘法拟合形如f(x)=(a+bx)/(1+cx)的函数（9.2.2(1))，并解决人口预测问题(9.2.2(2))(Least squares fit of the form f (x) = (a+bx)/(1+cx) function (9.2.2 (1)), and to solve the population prediction problem (9.2.2 (2)))