clean

在matlab环境下，采用二进制的编码方式，利用遗传算法，对数学问题进行研究。(In the matlab environment, the use of binary encoding, the use of genetic algorithms, to undertake a study of mathematics.)

all possible permutations of the numbers 1:n(all possible permutations of the numbers 1 : n)

garch工具箱 估计garch模型和garch参数。(garch toolbox very powerful useful toolbox recommended! ! !)

【转】协同过滤代码，用于推荐系统，包括基于项目和基于用户两种情况。实现基于用户和基于项目的协同过滤算法。 实验所用数据为MovieLens – a web-based movies recommender system with 43,000 users & over 3500 movies. 保存在ga.mat文件用，由于ga.test测试集过于庞大，全部用来计算的话耗时庞大，所以每次计算时随机选择部分，具体函数的使用请参照probar.m。我所得到的实验结果保存在results1-results8.mat里面。([Turn] collaborative filtering code for the recommended system, including project-based and user-based two cases. User-based and project-based collaborative filtering algorithm. Experimental data for MovieLens- a web-based movies recommender system with 43,000 users & over 3500 movies. Saved in ga.mat file with Because ga.test test set is too large, all used to calculate the time-consuming massive, so every time The calculated random selection portion, the use of the specific function, please refer to probar.m. I obtained experimental results are saved inside results1-results8.mat.)

ls ber performance OF OFDM CHANNEL WHICH shows why ls in ofdm is better than other.

根据推导的公式仿真中重LFM信号的回波及处理过程,单个脉冲的回波（距离模糊情况下）为一行向量, 本程序专门用于对比不同处理情况下的积累效果(Long accumulation of compensation)

基于MATLAB中的SIMULINK的一个非常好的太阳能PV模块，输入为电压输出为电流(base on simulink of matlab,it is a good module of photovotics)

图象处理：计算连通域的面积、周长、圆形度、矩形度以及长宽比(Image processing: computing connected domain area, perimeter, roundness, and aspect ratio rectangular degree)

说明：  function [ret,x0,str,ts,xts]=s4(t,x,u,flag) s4 is the M-file description of the SIMULINK system named s4. The block-diagram can be displayed by typing: s4. SYS=s4(T,X,U,FLAG) returns depending on FLAG certain system values given time point, T, current state vector, X, and input vector, U. FLAG is used to indicate the type of output to be returned in SYS.

Prony方法是一种在已知时域冲击响应时构造IIR滤波器（即ARMA）的算法(Prony method is a kind of time-domain impulse response is known IIR filter structure (ie ARMA) algorithm)