20110303

power_steppermotor.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_steppermotor.rar,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

usefull commands for matlab introductions and mathematical fuctions

matlab数字图像处理，包含m文件，产生高斯噪声或椒盐噪声然后降噪(matlab digital image processing, including m file, Gaussian noise or impulse noise and noise reduction)

直接序列扩频（Direct Sequence Spread Spectrum）工作方式，简称直扩方式（DS方式）。就是用高速率的扩频序列在发射端扩展信号的频谱，而在接收端用相同的扩频码序列进行解扩，把展开的扩频信号还原成原来的信号。(irect Sequence Spread Spectrum (Direct Sequence Spread Spectrum), hereinafter referred to as Direct expansion mode (DS). Is a high rate of spread spectrum sequence extension in signal spectrum, and at the receiving end with the same spread spectrum code sequence for expansion, the expansion of the spread spectrum signal back into the original signal. )

说明：  这是一个信赖域方法的程序，简单实用，对初学者非常有用(This is a trust region method procedures, simple, practical, very useful for beginners. )

本章介绍MATLAB在概率统计中的若干命令和使用格式，这些命令存放于MatlabR12ToolboxStats中。(This chapter describes the MATLAB in probability and statistics in a number of commands and use format, these commands stored in MatlabR12 Toolbox Stats in.)

说明：  极其实用的matlab小程序 初学者必备(Very useful little program for beginners essential matlab)

High Step-Up DC-DC Converters Using Zero-Voltage Switching Boost Integration Technique simulink model.

介绍了坐标变换在异步电机中的应用条件和原则，以便能够快速地在异步电机中选择合适的坐标，提高工作效率．并结合异步电机矢量控制存MT坐标系中变换后，可类似于直流电机的转矩电流分量和磁场电流分量(the vector control of asynchronous motor based on the right coordinate)

计算感应测井的六线圈系几何因子，包括微分，积分的径向和轴向几何因子(compute the six-coil geometric factor in induction logging. )