song_yyjjxq

说明：  本程序用于电子稳像，函数很多，也很全,都放在了一个文件里(This program for Electronic image stabilization, there are many functions)

说明：  关于数字水印的一些代码 基于离散余弦变换 (on digital watermarking code based on the Discrete Cosine Transform)

描述心电信号的的幅频特性以及心电信号的功率谱特性。(Description of the ecg signal amplitude frequency characteristics and ecg signal power spectrum characteristics. )

clear 清除内存变量 clc 清空工作区内容 N = 10 一般取6-18间的偶数，N值越大理论上结果越精确 V =zeros(1,N) 申请存储V(i)的空间(So no water influx curve)

Stephen J.Chapman《MATLAB编程（第二版）》英文影印版的中文译本，这本书对初学者很好的入门教材。(Stephen J.Chapman "MATLAB Programming (second edition)," the English version of the Chinese translation of photocopying, this book is a good primer for beginners.)

给出五种常用小波基的时域和频域波形图及matlab代码。(Five commonly used wavelet basis is given time domain and frequency domain waveform and Matlab code.)

说明：  基于matlab的标准粒子群优化算法,?趍atlab的标准粒子群优化算法,(Matlab based on the standard particle swarm optimization algorithm,? 趍atlab standard particle swarm optimization algorithm,)

matlab工具箱的理论与应用，对于刚接触matlab的朋友来说是很有用的(matlab toolbox of theoretical and applied, for friends刚接触matlab is very useful)

此为matlab版的gist特征提取，亲测可以直接运行(This is the gist of feature extraction matlab version, pro-test can be run directly)

活塞式压缩机级间管道压力脉动matlab小程序(a matlab program to calculate the pressure pulsation of piston compressor interstage pipe)