zhuanjiaPID

说明：  对曲线进行拟合，使得最后拟合的数据与元数据的误差最小(The curve fitting, so that the final fitting of the data with the metadata minimum error)

Main.m为粒子群算法程序,属于优化类，data.txt为粒子群算法的数据文件(The Main.m particle swarm optimization procedures, belonging to the optimization class data file data.txt for the particle swarm algorithm)

the day of year是指这一年已经逝去的天数（包括当天） 。在平年中，它的取值范围为 1 到 365，在闰年中，它的取值范围 1到 366。编写一个 MATLAB 程序，输入年，月，日， 输入为对应的 the of year。 (the day of year is the year the number of days have been lost (including the day). In the average year, it ranges from 1 to 365, in a leap year, it ranges from 1 to 366. Write a MATLAB program, enter the year, month, day, enter the corresponding the of year.)

read and write netcdf file

利用MATLAB对原有声音波形进行加躁，去噪。得出加躁语音频谱图、去噪语音频谱图，以及对应文件。 (The original voice waveform with manic using MATLAB, denoising. The impatient voice spectrum, denoising voice spectrum graph, and the corresponding file.)

Control system dynamic simulation instance tutorial,可以很好的学习交流控制系统的仿真(Control system dynamic simulation instance tutorial, can be a good learning exchange control system simulation)

可以简单的绘制国旗，基本的绘制国旗的程序，适用于初学者(Can simply draw the national flag, the flag of the basic procedures for the drawing for beginners)

基于Matlab的数字电子琴的设计与实现1(Matlab based on the number of flower Design and Implementation 1)

入门omnet++,omnet++仿真实验，欢迎大家一起交流。(It is very useful for student who study omnet++.)

matlab程序设计基础PPT的一个集合包(matlab program design based on a collection of packages PPT)