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流行学习方法局部保持投影（LPP）算法MATLAB代码(Popular learning methods locality preserving projections (LPP) algorithm MATLAB code)

一个二维静电场，电位函数为φ（x, y），将正方形分成25个正方形网格。有16个内部网格点。假定16个网格点的初值都定为零，试用超松弛法确定16个内部网格点的电位值。(A two dimensional electrostatic field, the potential function for phi (x, y), the square into 25 square grid. There are 16 internal grid point. Assume that 16 mesh point of initial value at zero, trial overrelaxation method to determine the potential value of 16 internal grid point.)

说明：  用proteus仿真实现逆变器，基本实现闭环控制，单片机是ATMEGA88。(The inverters are simulated by proteus, and the closed-loop control is basically realized. The single chip computer is ATMEGA88.)

该程序是MATLAB源程序，可以用来求纹理图像的方向。(MATLAB source code of the procedure can be used to seek the direction of texture images.)

MATLAB与PSCAD联合仿真实例,包括 hvdc_fourier、hyst_plot、phasor、three_dim_plot等(The Co-Simulation of MATLAB and PSCAD，including hvdc_fourier、hyst_plot、phasor、three_dim_plot.)

说明：  这是SAR成像点目标仿真中的CS算法，程序严格按照Ian G. Cumming的《合成孔径雷达成像算法与算法》中CS算法来编写，对于学习CS算法的同学来说是入门级的仿真程序(CS SAR imaging point target simulation algorithm, the program written in strict accordance with the Ian G. Cumming synthetic aperture radar imaging algorithm and algorithm CS algorithm is the entry-level simulation program for students learning the CS algorithm)

puma260机器人的变换矩阵计算及其工作区域绘制。(puma260 robot transformation matrix calculation and the work area to draw.)

相机检校的另一方法Tsai，在MATLAB中实现，可以与张正友的方法作比较。(Another method of camera calibration Tsai, in MATLAB to achieve, you can and Zhang are the Friends of the method for comparison.)

this is a MATLAB Simulation for a Adaptive PID controller based on a sliding mode for uncertain chaotic systems.

求PI的值，根据莱布尼茨公式求PI，PI=4*（1-1/3+1/5-1/7+1/9-1/11+……(PI uated, find PI, PI= 4* (1-1/3+1/5-1/7+1/9-1/11+ Leibniz formula based on ......)