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说明：  基于matlab的QPSK调制及其误码率曲线(QPSK modulation and the bit error rate curve)

This is a steganography program using least significant bis to hide image in other image program

the program consists of- 1 GUI development in Matlab, 2 Convolution of analog signal 3 Correlation of analog signal 4 DFT calculation 5 Convolution of infinite signal using overlap method

使用matlab_GUI编写，包括：扩展卡尔曼滤波，粒子滤波，去偏卡尔曼滤波和循环增益尔曼滤波的源程序，根据初始预测计算滤波值 再通过输入观测值进行卡尔曼滤波的仿真GUI界面程序(Matlab_GUI prepared to use, including: extended Kalman filter, particle filter, to the partial gain of Kalman filter and recycling thalmann source filter, according to the initial value of prediction filter observations through the input of the Kalman filter to simulation procedures GUI interface)

PROGRAM IS USED FOR Interface matrix keyboard with 8051.

本文件包含了William Stallings编写的优秀教材Data and Computer communications的中文影印版，以及书中的课后习题答案(This document contains the William Stallings excellent teaching materials prepared by Data and Computer communications photocopy version of the Chinese, as well as after-school book answer Exercises)

这个程序是关于数字图像处理里面的测量物体周长，还有中心，最后是画出物体的最小外接矩形。(This program is about digital image processing measurement of body inside the perimeter, there are centers, and finally draw the object' s minimum bounding rectangle.)

定步长ODE4、ODE5算法，用法和ode45相似 唯一不同的就是ode45是[t,y]=ode45(), 这个是y=ode4()，因为是定步长的(Fixed-step ODE4, ODE5 algorithms, usage, and the only difference is similar to ode45 ode45 is [t, y] = ode45 (), this is y = ode4 (), because the step length is fixed)

加州大学的MATLAB人脸识别代码，采用了图像结构模型，可以很好地识别人脸(University of California MATLAB code for face recognition, using the image structure model, can be a good face recognition)

说明：  He-Chen-Zhang多相流LBM模型 《Multiphase Lattice Boltzmann Methods Theory and Application》书后代码(Multiphase Lattice Boltzmann Methods Theory and Application)