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The generating systems use Doubly-Fed Induction Generators (DFIGs) to achieve high conversion efficiency and to reduce the installation cost. This paper presents a modeling and Maximum Power Point Tracking (MPPT) control method of DFIG-based variable-speed wind energy conversion system. The generator considered is a wound rotor induction machine whose stator is connected directly to the grid and the rotor is fed through back-to-back Pulse-Width Modulation (PWM) converters. Stator flux-oriented vector control is applied to control the active and reactive current loops independently. The MPPT control method in a Wind Energy Conversion System (WECS) is proposed. The proposed control solution aims at driving the position of the operating point near to optimality. This is a very important aspect to maintain DFIGs efficiently in a variable wind speed. The wind generator is modeled in RSCAD program which is interfaced with the Real Time Digital Simulator (RTDS).

用杂波协方差矩阵估计输入信号协方差矩阵的方法（输入为杂波和导向适量）(Noise covariance matrix estimated using the input signal covariance matrix method (input amount of clutter and orientation))

GS算法的matlab例子，本例子仿真了一个圆形的光环结构，其它的参数见matlab中的注释(GS algorithm matlab example, the example of simulation of a circular ring structure, and other parameters, see the Notes matlab)

说明：  applied mathematics in integrated navigation systems第三版的随书光盘(applied mathematics in integrated navigation systems with the third edition of the book CD-ROM)

学习模糊控制的经典教材，是一本学习模糊控制的好书，值得大家学习！(Learning fuzzy control is one of the most classic materials, worth learning!)

an example for MVDR with interference

用matlab简单实现傅里叶变换的源程序(Easy to use matlab implementation of the Fourier Transform source code)

Fading envelope simulator

removal of powerline interference in ecg

说明：  fdtd 例程，了了解和学习FDTD方法的基础，呵呵，很不错的哦(fdtd routines, understanding and learning based on the FDTD method, huh, oh very good)