特征降维

模式识别相关技术，EM算法简介，EM算法是关于半监督学习的一种技术(Pattern recognition technology, EM algorithm About, EM algorithm is on a semi-supervised learning techniques)

matlab一般常用功能都有详细的源码，可供初识matlab的学者使用(matlab commonly used functions are detailed source for scholars to use matlab acquaintance)

计算信噪比，计算公式是信号能量比上噪声能量(SNR Calculation，signal power divide noise power)

this code very good for TSOM

说明：  这是一个关于函数逼近的matlab程序，程序设计简单易懂，在稍微复杂的地方注有说明(This is a matlab program on the function approximation, the program design is simple and easy to understand, in the slightly more complex note has made it clear where)

利用MATLAB工具,实现维特比译码的仿真,一个比较简单的做法(using MATLAB tool, Viterbi decoding simulation, a relatively simple approach)

此程序主要演示通道间幅度误差对DBF旁瓣电平的影响。(This program is mainly to demonstrate of effect of channel amplitude errors on the sidelobes of DBF.)

关于非线性离散系统辨识，解耦，恢复原信号，BP神经网络的整个训练过程。( Nonlinear discrete system identification, Decoupling, restore the original signal, The entire training process BP neural network.)

说明：  bp神经网络的源程序，很实用，很不错的！(bp neural network source code, very practical, very good!)

generating time series data for system identification projects.