ACO_GA_PSO

说明：  通信系统仿真中，用于生成同步训练序列,第一帧产生短训练序列，第二帧产生长训练序列。(To generate the synchronization training sequence in the simulation of Communication system.the first frame is used to produce short training sequence, the second frame to give a long training sequence.)

设计的一种带通滤波器 具有很好的滤效果。(Design of a bandpass filter with good filtering effect.)

signals and systems matlab codes

有限差分求burgers方程...LAX-FRIEDRICH(Finite difference burgers was not beg equation )

说明：  做m-k突变检验，直接载入excel，方便快捷，真心实用(Do mk mutation testing, direct loading excel, convenient, really practical)

Example of ADI method foe 2D heat equation.

直接序列扩频（Direct Sequence Spread Spectrum）工作方式，简称直扩方式（DS方式）。就是用高速率的扩频序列在发射端扩展信号的频谱，而在接收端用相同的扩频码序列进行解扩，把展开的扩频信号还原成原来的信号。(irect Sequence Spread Spectrum (Direct Sequence Spread Spectrum), hereinafter referred to as Direct expansion mode (DS). Is a high rate of spread spectrum sequence extension in signal spectrum, and at the receiving end with the same spread spectrum code sequence for expansion, the expansion of the spread spectrum signal back into the original signal. )

说明：  用matlab编写的灰色模型程序，可以实现拟合(Gray model )

说明：  x=2*sin(4*pi*t)+5*cos(8*pi*t) 对其进行快速傅立叶变换 加入高斯噪声 再进行频谱分析(x = 2* sin (4* pi* t) 5* cos (8* pi* t) makes its rapid Fourier transform to re-Gaussian noise spectral analysis)

粗糙集工具箱 可以进行粗糙集上下近似集的计算，重要度等等 属性约简 决策分类等等(Toolbox rough sets rough sets can calculate the upper and lower approximations, importance, etc., etc. Classification Decision Attribute Reduction)