hw2_ar

用于产生QPSK卷积码的程序，已经完整运行过，可运行(QPSK convolutional code used to generate the program has had a full run, run)

Here the syms toolbox is used and if you try to print any other values than lambda then MATLAB will print the value in fractions and that is unavoidable. So if you need to know the value in decimal, then use the command vpa() on command window

laboratory work in matlab

小波包分析提取振动信号中的特征频率，包含优化类的几个简单示例程序，MIT人工智能实验室的目标识别的源码。( Wavelet packet analysis to extract vibration signal characteristic frequency, Optimization class contains several simple sample programs, MIT Artificial Intelligence Laboratory identification of the target source.)

用改进的粒子群算法对基于非对角MAC矩阵元素均值最小目标函数为目标函数，以简支梁前三阶模态振型为原始数据对简支梁进行传感器优化布置。(The objective function based on the average minimum objective function of the non-diagonal MAC matrix elements is studied by the improved particle swarm algorithm.)

说明：  wsn路由，用matlab仿真，具有选簇的功能(WSN routing, simulated with MATLAB, has the function of cluster selection)

This program do the NMF based clustering

输入高频信号，设计高通滤波器，程序中有图像显示()

数字水印技术是近年来图像保护技术研究领域的一个热点, 本文提出了一种基于小波变换的图像数字 水印嵌入算法的Matlab 实现。实验结果表明, 该算法具有较好的视觉效果和透明性。(Digital watermarking technology in recent years is to protect technology research in the field of image a hot, this paper puts forward a method based on wavelet transform is the digital image Watermark imbedding algorithm Matlab. The experimental results show that the algorithm has good visual effects and transparency. )

逻辑回归实现线性分类器，文件中的readme.txt可以看到使用方法。 具体使用就是通过data.txt读入数据（默认2维数据，分为正反两类。）然后用matlab运行solve.m即可得到分类线、分类准确率。(a matlab source code for Logistic Regression. Datas in data.txt are of 2dimension and 2 types. run solve.m in matlab software to get the accuracy and the plot result.)