Hiding-data-in-an-image

matlab 实验，这是上课的实验，有基本应用，适合信号。通信专业初学者入门使用( MATLAB exercises,are suit for students whose majors are signal processing ang communication)

利用matlab读入wav音频，进行音频均衡后，播放音频效果(using Matlab read into wav Audio, Audio balanced, the broadcast audio effects)

Robot control by Frank Leiw

语音信号的iir滤波器设计,从带有噪音的信号中提取原始声音.目前，MP3播放器一般功率放大器的工作频率范围就是这个范围。但是大部分有用的和可理解的信息的频率在200到3500Hz之间。所以我们可以在这个范围间滤波，达到使声音可理解的要求。现将数字滤波器的设计指标设为通带截止频率fb=600HZ,阻带频率fc=1200HZ,通带波纹Ap=1dB，阻带波纹As=40dB,要求确定H(z)。(design of the iir filter, get the original voice without noise)

数学建模中的图论知识来研究最短路径的问题，利用Dijkstra算法matlab实现(Graph theory knowledge in mathematical modeling is used to study the shortest path problem, which is realized by using Dijkstra algorithm matlab.)

民用日传换到儒略日的matlab function。输入民用日的 年，月，日，小时，算得儒略日。(The civil day pass conversion to Julian day of Matlab FUNCTION. Enter the civil day of the year, month, day, hour, can be regarded as the Julian day.)

说明：  PSO优化算法优化多变量没别的了，就这样了了了了了了(PSO optimization algorithm)

说明：  今天好心情，搞了几个小程序，大家分享一下(A good mood today, engaging in several small programs, we share)

matlab中图像展开说明，适用于matlab中，很好的程序(matlab in image deployment instructions for matlab in a very good program)

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