PID_4

说明：  using matlab GUI to do several operations on picture loaded..

经典PID与增加了高阶微分的改进PID的对比程序。(The classical PID VS the GPID with high order PID differential.)

newton rphson power flow

EMD/HHT是一种处理非线性非稳态信号的经典算法，自98年提出以来已经获得广泛的使用，作者huang曾经因次获得NASA的最高奖。(EMD/HHT is a deal with the nonlinear non-stationary signals classical algorithm, since 98 has been raised since the widespread use huang had dimensionless author was NASA's highest award.)

modeling of dc motor

matlab学习资料，讲述了在matlab下如何计算阶乘。(matlab learning materials, about how to calculate the factorial in matlab.)

扫频信号3d分析,时间、幅度、频率三维显示，图形用水墙、分布图显示。(The sweep signal 3d, time, amplitude, frequency, three-dimensional display, graphics water wall maps.)

source code for watermark

i guess this is the last time

Hilbert-Huang变换中经验模式分解（EMD）代码(Hilbert-Huang Transform in the empirical mode decomposition (EMD) code)