C__4

自己实现的一个简单的计算器，支持大数的加减乘除、开平方等操作，不适用库函数。(Themselves to achieve a simple calculator, to support the addition and subtraction, multiplication and division of large numbers, such as square root operations, library functions do not apply.)

基于多点的快速傅立叶变换算法C++开发环境(based on multi-point fast Fourier transform algorithm C Development Environment)

关于非线性离散系统辨识，小波包分析提取振动信号中的特征频率，有小波分析的盲信号处理。( Nonlinear discrete system identification, Wavelet packet analysis to extract vibration signal characteristic frequency, There Wavelet Analysis Blind Signal Processing.)

计算岩石表面裂隙宽度并求取其表面粗糙度系数(Calculate the rock surface crack width and strike the surface roughness coefficient)

渗流计算，渗流浸润线的计算，溢出点高程的确定(seepage computation)

密度，比热，热导率，粘性系数随压力、温度变化的UDF(UDF of density, specific heat, thermal conductivity, viscosity coefficient with pressure and temperature.)

说明：  该文件是用C语言实现快速傅里叶变换的源代码，需要的朋友快下载(The document is used C language to achieve fast Fourier transform of the source code, need friends fast download)

求解实系数方程组的高斯消去法，约当法，追赶法，分解法，平方根法，大型稀疏方程组法(Solving real coefficient equations of the main Gaussian elimination, about the law to catch up with France, large-scale sparse equations.)

用于处理电力系统中含有4个节点的随机潮流计算(Four nodes to deal with the random flow calculation)

分享一个外国人编写的FDTD程序,可以用来计算微带线和微带贴片天线,程序中采用的是均匀网格划分,但也可以在容易地在它基础上改写成非均匀网格.其边界条件与Sheen的程序不同,这里采用二阶技术.(Prepared to share a foreigner FDTD procedures, can be used to calculate the microstrip lines and microstrip patch antenna, the procedure used is uniform mesh, but can also easily rewrite it into the basis of non-uniform grid. its boundary conditions with different processes and Sheen, where second-order technology.)