rili

偏最小二乘法中的交叉有效性计算,看看，可能有用(PLS cross-validity of the calculation, see, may be useful)

C语言实现大数的加法减法以及乘法,水平限于仅仅大学生水平学习使用。(Use C language to achieve that addition, subtraction, and multiplication of a big intger.)

FFT/IFFT 变换程序----------------(FFT/IFFT transformation process----------------)

同时辨识模型阶次及参数算法。用阶次递推算法，结合AIC法——利用赤池信息准则辨识上例的模型阶次和参数。(At the same time identify model order and parameters algorithm. By order recursive algorithm, combined with AIC method- the use of Akaike information criterion to identify the cases of the model order and parameters.)

说明：  平面问题的有限元基础，大家可以参考一下学习学习(The finite element foundation of the plane problem, you can refer to it)

内插高程点，CASS不提供插求高程点功能，我们手工输入容易出错，且极度不方便，。 此程序用VBA编写，界面操作，按设定的比例自动计算需内插的个数并注记。(Interpolated elevation points)

说明：  Fractal分形，简短的代码，清晰可用(Fractal)

fortran语言的球谐函数离散坐标法大气传输模型主程序，可用于大气场景生成(FORTRAN， spheric harmonic function of the discrete coordinate method main program, the atmospheric transmission model can be used for the atmospheric scene is generated)

C语言实现多项式的最小二乘拟合，可用于在区间上对函数进行拟合(C language polynomial least squares fitting, can be used to fit the function on the interval)

有限元n维实体材料单元，仅供科研用途，拒绝商业使用(N-dimensional finite element solid material element, for scientific purposes, refusing commercial use)