ply_write

计算曲面换能器空间各点随时间变化的声场强度，采用的是时间差分法。精度高。(Transducer surface computing space changes over time, each point field intensity, using the time difference. High accuracy.)

说明：  一点遗传算法的matlab程序，本人初学算法，积累不多，这个是转载的，比较清晰易懂，适于初学者(Point genetic algorithm matlab program, I am learning algorithm, the accumulation of small, this is reproduced, more user-friendly, suitable for beginners)

-给原始的语音信号加上一个高频余弦噪声，频率为5kHz。画出加噪后的语音信号时域和频谱图--(- To the original speech signal with a high-frequency cosine noise, frequency of 5kHz. Draw the speech signal with noise after the time-domain and frequency spectrum-)

基于傅里叶变换的matlab下的二维周期性光子晶体带隙的计算绘图程序，属于冷门资料，网上很少见。(Based on Fourier transform matlab under the two-dimensional periodic photonic bandgap calculation drawing program, belonging to popular information, online rare.)

fresnel衍射传播函数，可以计算光波衍射过程(fresnel diffraction spread function can be calculated light wave diffraction process)

k-means均值算法matlab语言写的，很实用的源码(k-means means algorithm matlab language, very useful source)

用三种不同的方式在矩形材料内切出指定半径大小的圆的算法，本来是建模实习的作业题(Three different ways in the rectangular-cut material the size of the specified radius of a circle algorithm, it is modeling the operation of internship title)

说明：  盒维数MATLAB计算程序。%根据计盒维数原理编写了求一维曲线分形维数的matlab程序 function D=FractalDim(y,cellmax) %求输入一维信号的计盒分形维数 %y是一维信号 %cellmax:方格子的最大边长,可以取2的偶数次幂次(1,2,4,8...),取大于数据长度的偶数 %D是y的计盒维数（一般情况下D>=1）,D=lim(log(N(e))/log(k/e)), (box dimension MATLAB program. % Under the box dimension of the principle of preparing for a peacekeeping curve fractal dimension of Matlab procedures function FractalDim D = (y, cellmax)% for the importation of one-dimensional signal box fractal dimension% y Victoria is a signal llmax : square of the largest side length, the two can take several dual Power (1, 2,4,8 ...), data from more than even the length of the% D y is the box dimension (Dgt under normal circumstances; = 1), D = lim (log (N (e))/log (k/e)) ,)

用Jacobi迭代法计算大型方程组的MATLAB函数文件(Jacobi iterative method using large calculation equations MATLAB function documents)

Based on digital image processing，develop a simulation program for car plate character segmentation, which is required to have image input, image preprocessing, image segmentation and morphology filter functions.to obtain a good result for segmentation we must perform skew correction.