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一个应用于做人脸识别之前，对人脸来提取特征点的，带方向的滤波操作(wld is a filter to extract the important features from face image.)

运筹学中的分支定界法，采用MATLAB编程，比较实用(Operations research branch and bound method, using MATLAB programming, more practical)

face recognition program using eigenface approach and euclidean distance method.

运用粒子群优化算法对ARMA(p,q)模型的阶数进行优化是可行的，且利用优化后的ARMA模型对航空发电机状态趋势进行分析的结果十分准确，与原始数据所表现出的航空发电机状态变化趋势基本一致。经计算，此时分析结果的平均相对误差较小，仅为1.38 ，与优化前构建的ARMA模型相比，平均相对误差降低0.23个百分点，优化效果明显。(Using particle swarm optimization algorithm to optimize the order of the ARMA (p, q) model is feasible, and the use of the results of the ARMA model optimized air generator status trends analysis is very accurate, and the raw data showed aviation the generator status consistent trend. Calculated analysis of the results, the average relative error is small, only 1.38 , compared with the the ARMA model built before optimization, average relative error is reduced by 0.23 percentage points, to optimize the effect is obvious.)

The following attachment contains codes in Matlab for digital signal processing. In the file code is for analyzing digital signals

说明：  基于磁场定向矢量控制永磁同步电机MATLAB仿真模型(MATLAB Simulation Model of Permanent Magnet Synchronous Motor Based on Field Oriented Vector Control)

用matlab调用HFSS代码hfssapi.rar(HFSS code using matlab call hfssapi.rar)

系统辨识中一个有用的算法：面积法 对传递函数辨识精度高(System Identification Techniques)

说明：  利用多窗口法实现频谱估计，本例直接调用pmtm函数进行估计。(Using multi-window method of spectrum estimation, in this case to estimate the direct call pmtm function.)

matlab中边频的示例程序，操作简单，可直接复制，便于调用。(side frequency in matlab sample program, simple operation, can be directly copied, easy call.)