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寻找测试样本的最近邻，可以有效的用于用于模式识别，信号处理(This is a small but efficient tool to perform K-nearest neighbor search, which has wide Science and Engineering applications, such as pattern recognition, data mining and signal processing. The code was initially implemented through vectorization. After discussions with John D Errico, I realized that my algorithm will suffer numerical accurancy problem for data with large values. Then, after trying several approaches, I found simple loops with JIT acceleration is the most efficient solution. Now, the performance of the code is comparable with kd-tree even the latter is coded in a mex file. The code is very simple, hence is also suitable for beginner to learn knn search.)

是一种特征选择方法，距离评价技术，可以降低特征值的维数。(Is a kind of feature selection methods, distance evaluation technology, can reduce the characteristic value of the dimension.)

自动控制方面的MATLAB程序，PID控制(Automatic control of MATLAB, PID control)

本程序利用显式差分格式，将波动方程离散化，进而求出波动方程的数值解，不断地细化空间和时间步长，可以让数值解逼近理论解。(The program with the implicit difference method, the discrete wave equation, the numerical solution is obtained, continue to refine the long walk the numerical solution can approach the theoretical solution.)

说明：  该程序可将指纹图片进行归一化、二值化、细化、提取特征点，可供大家参考学习。(A great Fingerpoint program which can solve some problem related.)

细化谱是信号处理领域重要的一种分析方法,这是一个matlab的细化谱程序,并且配有详细的注释(Spectrum is an important refinement of an analytical method of signal processing, which is a refinement of the spectrum matlab program, and with detailed notes)

说明：  用MATLAB元胞自动机实现随机游动，包括自动停止和计算步数等。(Random Walking with MATLAB cellular automation)

Amba 2.0 specification

feature deflections identification

超短激光脉冲传输：展宽、色散、自自相位调制、倍频、FROG，超短脉冲测量(Ultrashort laser pulse transmission: broadening, dispersion, since the self-phase modulation, frequency, FROG, ultra-short pulse measurement)