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粒子群优化(PSO)算法是计算智能领域，除蚁群算法外的另外一种基于群体智能的优化算法。(Particle Swarm Optimization)

em算法的matlab实现，简单适合入门，可以参考(em algorithm matlab implementation, simple for entry, refer to)

KPCA原始程序，可用于故障诊断，并附有T2和SPE诊断图(KPCA original program can be used for fault diagnosis, together with the T2 and SPE diagnostic diagram)

MATLAB 牛顿下山法的一个小程序，原理就不详细说了。因牛顿迭代法受初值选取的限制，为防止迭代发散，对迭代过程再附加一项要求:|f(x(k+1))|<|f(x(k))|,将牛顿法迭代的结果:x(k+1) =x(k)-f(x(k))/f (x(k))和前一近似值x(k)适当加权平均做为新的改进值:x(k+1)=u*x(k+1) +(1-u)*x(k),其中u(0<> 迭代时u取1开始，逐次减半计算，直至附加要求符合为止。实例计算中x(k)=x(0)不变，只更新u和x(k+1)，直至:|f(x(k+1))|<|f(x(k))|（即|f(x(1))|<|f(x(0))|)，然后更新下山因子为u=1,继续以牛顿法迭代。(MATLAB Newton-down a small program, the principle is not explained in detail. Newton iteration by the initial value of the selected limit, in order to prevent additional iterative divergence, the iterative process a request: | f (x (k+1)) | < | f (x (k)) | Newton iteration Results: x (k+1) ' = X (k)-f (x (k))/f' (x (k)) and a previous approximation x (k), appropriately weighted average as a new improved value: x (k+1 ) = u* x (k+1) ' + (1-u)* x (k), where u (0 < u> iteration take successive calculated at 50 until the additional requirements found so far. examples of calculation of X ( k) = x (0) unchanged profile u and x (k+1, hungry) until: | f (x (k+1)) | < | f (x (k)) | (i.e. | f (x (1)) | < | f (x (0)) |), then profile downhill factor for u = 1, to continue to Newton iteration.)

MATLAB软件实现绘图函数简介的教程，可以为初学者提供参考(Introduction to MATLAB software tutorials drawing functions, can provide a reference for beginners)

说明：  有限单元法原理与应用（第一版）--b朱伯芳.pdf(Principle and Application of finite element method (first edition)- b CENTRAL SOUTH HIGHWAY. Pdf)

图像增强，一个很简单的图像增强的matlab算法。应付交作业哈(Image enhancement, a very simple method of image enhancement matlab. Assignment Due Kazakhstan meet)

基于Matlab的三电平SVPWM逆变器的仿真实现(Three-level inverter SVPWM the Matlab simulation-based implementation)

说明：  MATLAB仿真的QPSK系统，包括非常详细的系统结构图，系统分析，仿真分析，代码等等(MATLAB simulation of the QPSK system, including a very detailed system architecture diagram, system analysis, simulation analysis, code, etc.)

本文件详细说明了PID算法Matlab仿真程序和C程序(Matlab simulation program and C program of PID algorithm)