Codes

说明：  使用GramSchimidt方法进行矩阵的QR分解和排序的GramSchimidt方法QR分解(QR decomposition using GramSchimidt method)

二维光子晶体能带结构算法和三维光子晶体能带结构算法，主要是平面波展开法计算的(Two-dimensional and three-dimensional photonic crystal band structure algorithms)

说明：  防止电脑泄密的常用方法,设置简单，通俗易懂，功能强大。(To prevent the disclosure of the commonly used computer methods, to set simple, user-friendly and powerful.)

应用MATLAB编写的图像分割程序。分割过程是，图像输入，边缘检测的计算(Applications written in MATLAB image segmentation procedures. Segmentation process, image input, the calculation of edge detection)

K-Means聚类算法 Matlab代码，内有程序注释。(K-Means Matlab)

该程序模拟了经典双稳系统随机共振中，噪声强度与系统做功的关系(The program simulates the classical stochastic resonance in bistable system, the relationship between noise intensity and the system to do work)

一个简单的OFDM程序，有IFFT/FFT，QPSK调制解调，加入了高斯噪声，加入循环前缀。并且每行程序都有的详细注释，简单易懂。扩展性比较强，可以改写成自己的代码。(A simple OFDM procedures, there are IFFT/FFT, QPSK modulation and demodulation, joined the Gauss noise, adding a cyclic prefix. And each line of the program are detailed notes, easy to understand. Expansion is relatively strong, can be rewritten into their own code.)

function [g, badg] = numgrad(fcn,x,varargin)

基于卡尔曼滤波器的PMSM的电阻估计模型(Kalman filter based estimation model for the resistance of PMSM)

this file can be used to calculate the entropy of english language.