doa_music

分析一个文件夹及其子文件夹下所有的html文档，并查找文档中加载的png图片文件，通过urlwrite函数下载并保存png类型的图片文件到硬盘上。 此matlab代码用到了网络连接，下载，并且通过多线程技术，增加了下载的速度。 可以通过这个方法，下载网页中的内容，可以说想怎么下，就怎么下。(Analysis all the files of type html in a folder, find the documents that load png image file.Then download and save the png file to harddisk through urlwrite function .)

里面搜集了各种用matlab编写的回归分析算法，相信对参加建模竞赛的同学们会有所帮助。(Which collected a variety of regression analysis using algorithms written in matlab, I believe the students who participate in modeling contest will help.)

空时编解码程序，包括频偏信道模型（瑞利信道模型可选）(Space-time encoding and decoding procedures, including frequency offset channel model (Rayleigh channel models are available))

谱估计的welch算法、周期相关图谱估计算法(Welch spectral estimation algorithm, cycle-related pattern estimation)

说明：  som算法 组织神经网络用于图像分割matlab实现(som-organizing neural network algorithm for image segmentation matlab achieve)

读取气象雷达基数据（SA），能够实现产品显示和二次处理(Read the meteorology of Base data (SA), to be able to display and secondary treatment)

mimo-ofdm系统中MMSE信道估计算法(mimo-ofdm system MMSE channel estimation algorithm)

1)football.m简单地以阵列形式显示一副图； 2）pre.m是心音信号过滤归一化预处理的过程； 3）wavlet.m是用db6小波进行信号的分解和重构，且求包络能量函数； 4）path.m是利用KKT条件的路径跟踪法，用于求解二次规划问题； 5）LRmmse是MIMO通信中常用检测方法，结合了最小均方误差准则和格基规约的知识。(1) football.m simply displays a graph in an array 2) pre.m is the process of normalized preprocessing of heart sound signal filtering 3) wavlet.m is a db6 wavelet for signal decomposition and reconstruction, and to find the envelope energy function 4) path.m is the path tracking method using KKT condition, which is used to solve the quadratic programming problem. 5) LRmmse is a commonly used detection method in MIMO communication, combining the knowledge of minimum mean square error criterion and lattice protocol.)

说明：  本代码适用于随机场中的KL正交展开，可用于描述参数的空间变异。(This code is suitable for KL orthogonal expansion in random fields and can be used to describe the spatial variation of parameters.)

图像数据融合技术，加噪，去噪，聚酯类分析，并附有图片，绝对可用！(Image data fusion technology, noise, noise, polyester-type analysis, together with pictures, absolutely available!)