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光谱数据预处理程序，包括MSC,SNV,归一化，中心化，导数等等(Spectral data preprocessing procedures, including MSC, SNV, normalization, centering, etc. derivative)

此程式可以用於繪製Copula模型機率分配的3D圖。(This program is used for plot copula density function.)

PCM编码和解码的Matlab程序，已试验过，没有问题(PCM encoding and decoding in Matlab )

说明：  学习数学建模编程很好的资料，里面有各种算法的原理和实现代码。(Learning mathematical modeling programming very good information, there are a variety of algorithm principle and implementation code)

source code for different distribution models

多入多出系统信道的双环模型仿真程序，可以借鉴开发，双环模型是研究的大趋势，适用于精确的仿真需求(Multiple input multiple output loop simulation program of channel system, can draw lessons from the development, double loop model is the research trend, is suitable for the simulation needs accurate )

HI GUYA CHIT UAING MATLAB WE USE METOD LSB PLS CHECK IT VERY SEFULL

修饰的频域信道FWGN 过滤高斯白噪声（FWGN）信道模型 时域信道FWGN(a modified frequency-domain FWGN channel filtered white Gaussian noise (FWGN) channel model a time-domain FWGN channel)

face detector for facing to detect automatic without any sample

说明：  计算并绘制直方图. 绘制直方图的方法有很多，在此我用MATTAB中的一些代表性的绘制选项，使用函数bar\imhist(use function "bar" )