germ

ldpc码的matlab仿真程序，信息序列较小，但仿真效果好。(LDPC codes matlab simulation program, the information sequence of smaller, but better simulation effect.)

已知n个城市之间的相互距离，现有一个推销员必须遍访这n个城市，并且每个城市只能访问一次，最后又必须返回出发城市。如何安排他对这些城市的访问次序，可使其旅行路线的总长度最短？ (Known n city between the distance, the existing of a salesman to be visited this n city, and each city can only be visited once, finally to return to the starting city. How to arrange for him to visit the city order, which can make the total length of the shortest travel route)

EMD完整版（包括主程序中文解释及hhspectrum错误修正）(EMD full version (including the main Chinese interpretation and hhspectrum bug fixes))

先将47168bit的宿主音频等步长分段,分为1000段，然后混沌序列选择其中的102段，对每段进行3及小波分解，挑选出绝对值最大的系数，运用嵌入公式。(47168bit first step of the host audio sub-divided into section 1000, and then select one of the 102 chaotic sequence segment, on each piece of a 3 and wavelet decomposition, the largest absolute value coefficients selected using the embedded formula.)

matlab进行通信仿真的时候，经常需要进行信噪比的计算，然后什么是真正的信噪比。本文给出了详细的解释。SNR(what is the really SNR )

说明：  利用最小二乘原理建立了趋势项的一般模型，并利用MATLAB软件强大的矩阵计算功能，对一个含有非线性趋势项的周期信号进行了趋势项消除，并得到了预期效果。(Using the least squares principle to establish a trend term, the general model and the use of MATLAB software is powerful matrix calculation function, for a linear trend term with periodic signals the trend for elimination, and get the desired effect. )

基于matlab编写了SQP法，乘子法，共轭梯度法，拟牛顿法，信赖域法，最速下降法与牛顿法的最新程序，功能很强大，可供编程参考。(Based on the preparation of MATLAB SQP, multiplier method, conjugate gradient method, quasi-Newton method, trust region method, steepest descent method with the Newton-Raphson method the latest procedures, functions very powerful, can be used for programming reference.)

MATLAB 编程（第二版） 《MATLAB Programming for Engineers》的中文版，最好的编程教材。 (MATLAB Programming for Engineers （Second Edition） )

ELECTRONIC AND circuit analysis using Matlab

这里的k-means聚类，是事先给出原始数据所含的类数，然后将含有相似特征的数据聚为一个类中。(Where k-means clustering, is given in advance the number of classes contained in the original data, then the data contained similar characteristics grouped into a single class.)