LunarCalendar

说明：  通信系统仿真与分析中经常用到的高斯白噪声的产生方法(Communication System Simulation and Analysis in the frequently used Gaussian white noise, the method of)

《MATLAB小波分析（第2版）》张德丰源代码下载(" MATLAB Wavelet Analysis (2nd Edition)" Zhang Defeng Source Codes)

直接序列扩频仿真实例，产生m序列，然后进行扩频通信，对初学者很有用啊(Direct Sequence Spread Spectrum simulation example, useful for beginners )

很好的光伏并网MATLAB仿真模型，能够实现最大功率追踪。光伏电源通过逆变器并入电网，研究光伏并网相关问题。(Good photovoltaic grid MATLAB simulation model, to achieve maximum power tracking. Incorporated by photovoltaic power inverter grid photovoltaic grid-related research issues.)

说明：  图像特征提取，计算图像的7个Hu不变矩特征，matlab例程(Seven Hu invariant moments features of images)

QPSK modulation using a prbs data input

surf特征点检测，并实现两幅图像特征点的匹配(surf feature point detection, and the two images matching feature points)

transformer to wimp porgram for power system analysis

说明：  自由空间路径损耗模型 羽田孜路径损耗模型 IEEE802.16d的路径损耗模型 距离/正常阴影路径损耗模型(free space path loss model Hata path loss model IEEE 802.16d path loss model distance/normal shadowing path loss models)

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).