chap-PID

说明：  数值分析一题， 曲面拟合 5个表达式(that a numerical analysis, surface fitting 5 expression.)

HHT谱计算程序，不是rilling版本，用改进的Hilbert变换，效果好一些，供大家参考。(HHT spectrum of the calculation procedures, rilling is not a version of the Hilbert transform used to improve the results better for your reference.)

K means algorithm for clustering the data to k clusters

CJ.Lin的著名软件：LibSVM，实现的是SVM分类、回归的快速算法。在Matlab 7.0环境下直接调用。(CJ.Lin the leading software : LibSVM achieve the SVM classification algorithm for the rapid return. Matlab 7.0 environment directly call.)

MATPOWER是MATLAB的M文件包® 求解潮流和最优潮流问题。它的目的是作为一个研究者和教育者，是易于使用和修改仿真工具。MATPOWER是设计给最佳的性能，同时保持代码的简单理解和修改。它最初是为POWERWEB项目的一部分。(MATPOWER is a package of MATLAB® M-files for solving power flow and optimal power flow problems. It is intended as a simulation tool for researchers and educators that is easy to use and modify. MATPOWER is designed to give the best performance possible while keeping the code simple to understand and modify. It was initially developed as part of the PowerWeb project. )

有一个3阶对象，要求使用继电自整定方法对其实施自适应PID控制。 要求： 1、选择采样时间0.1s，把对象离散化。 2、加继电（开关）控制，测量对象的Tc,Kc。 3、利用ZIEGLER-NICHOLS 公式表，确定PID参数。 4、实现闭环控制。 5、根据调节效果，修正PID参数。 (A 3-order object, requires the use of relay self-tuning PID control methods on the implementation of adaptive. Requirements: 1, select the sampling time 0.1s, the discrete objects. 2, plus relay (switch) control, measurement object Tc, Kc. 3, using ZIEGLER-NICHOLS formula table, determine the PID parameters. 4, closed loop. 5, according to moderating effect, the amendment PID parameters.)

matlab绘图命令，描述了各种绘图用工具，对matlab新手有很好的指导作用(matlab drawing commands, described in a variety of drawing tools, good for novice matlab guide)

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遗传算法的编码实现 在MATLAB环境中(Coding Genetic Algorithm in the MATLAB environment)

The book of EM numerical methods