LevelSet_ChunmingLi_v1

matlab基础教程，里面有教程，习题，等等(matlab-based tutorial, which has tutorials, Exercise, and so on)

席位分配 可以在准备数学建模的时候作为练习资料(mathmodeling)

matlab code for edge detection

this function plots a cube

计算光子晶体光纤的有效折射率程序，可以得到有效折射率随波长变化图(Calculate the effective refractive index of the photonic crystal fiber program, you can get change in the effective refractive index with wavelength)

说明：  matlab 课件 初学matlab 的详尽资料 可以认真阅读 提高编程能力(matlab matlab novice courseware can read the detailed information to improve programming ability)

In a normal communication channel, it is often desirable to concentrate the information in as narrow a region of the frequency spectrum as possible in order to conserve available bandwidth and to reduce power. The basic spread spectrum technique, on the other hand, is designed to encode a stream of information by spreading the encoded data across as much of the frequency spectrum as possible. This allows the signal reception, even if there is interference on some frequencies. While there are many variations on spread spectrum communication, we concentrated on Direct Sequence Spread Spectrum encoding (DSSS). The DSSS method spreads the signal by multiplying it by a chip, a maximal length pseudorandom sequence modulated at a known rate. Since the host signals are in discrete-time format, we can use the sampling rate as the chip rate for coding.

By using these matlab codes one can simulate awgn in any system and cam add it to any signal for further analysis

电力电子仿真，电压空间矢量PWM的matlab实现，simulink仿真文件。(Power electronic simulation, voltage space vector PWM matlab, simulink simulation files.)

说明：  无刷直流电机的matlab/simulink建模(BLDCM the matlab/simulink modeling)