Variable-frequency-Drive

主成分分析代码，用matlab实现的，请大家参阅。(Principal component analysis code, matlab implementation, please refer to the.)

说明：  海量数据导入与导出MATLAB的有效方法(Import and export huge amounts of data and effective method of MATLAB)

本程序将时域数据转换为频域（功率谱密度），方便数据的处理和分析。(The program time-domain data is converted to the frequency domain (power spectral density), to facilitate the processing and analysis of data.)

code for image processing

pca based face recognition

High accuracy optical flow using a theory for warping(The files optical_flow_brox.m and optical_flow_sand.m are the files you need to run. optical_flow_brox.m implements the traditional algorithm. Just replace the first lines where images are read, with your image, and start the process. optical_flow_sand.m implements a variant presented in CVPR 2006. Again just replace the lines "img1 = imread( ... )" and "img2 = imread( ... )" with your images and the rest is automatic. The variable num_levels controls the number of images in the laplacian pyramid to be constructed. Change it to suit your convenience.)

应用切片理论计算船舶水动力系数，以一条船分为20站为例进行计算(Application slice theoretical calculations ship hydrodynamic coefficients to a boat into 20 stations as an example calculation)

传算法对BP网络权值阈值进行优化的matlab源代码(matlab code )

SHELL概述；SHELL变量介绍；引用类型；控制流结构；函数；调试；(SHELL Overview SHELL variable is introduced reference type control flow structure function debugging )

用MATLAB来实现支持向量机SVM和核函数的程序集(Support Vector Machine SVM and nuclear assembly MATLAB function. Rar)