SA_example

PCA的步骤： 1 先将数据中心化； 2 求得的协方差矩阵； 3 求出协方差矩阵的特征值与特征向量； 4 将特征值与特征向量进行排序； 5 根据要降维的维数d’,求得要降维的投影方向； 6 求出降维后的数据； (PCA steps: 1 of the first data center 2 covariance matrix obtained 3 obtained covariance matrix eigenvalues and eigenvectors 4 eigenvalues and eigenvectors will be sorted 5 according to the dimension of dimension reduction d ' , seek to reduce the dimension projection direction 6, the data obtained after the dimensionality reduction )

说明：  遗传算法MATLAB代码，绝对对你开始学习ｍａｔｌａｂ和遗传算法的人有帮助(MATLAB code of genetic algorithm, the absolute beginning of your learning and genetic algorithm matlab help people)

DCT变换的matlab源代码。适合用作特征提取的预处理方法来使用。(DCT transform matlab source code. Suitable for feature extraction preprocessing method to use.)

用MATLAB在M文件里编写连续谱密度函数(matlab)

视频抓帧，抓到连续图像每一帧。适合做视频的朋友(Video frame, catch caught continuous image each frame)

异步电机的各种仿真模型，包括定子磁链模型、转子磁链模型，力矩计算模型等(simulation model of asynchronous machine)

美国德克萨斯州大学电子工程系开发的一套进行语音分析的MATLAB程序． A MATLAB software tool for speech analysis．(University of Texas, Department of Electronic Engineering, developed a voice analysis of MATLAB. A MATLAB software tool for speech analysis.)

spvwm模块,matlab/simulink环境中搭建，经测试模型正确。(the module of svpwm,Matlab environment to build)

spread spectrum simulation

通过matlab绘制一个运动的图，图中为小球摆线运动(Matlab draw a sports figure, the figure for the cycloidal motion of the ball)