power_rec

matlab编写的离散fourier变换程序，好东西哦　(Discrete fourier transform process　with matlab language, good things!)

说明：  基于MATLAB的组合模型 在港口吞吐量预测中的应用 以某港1998--2007年集装箱吞吐量为实测数据，建立其集装箱吞吐量的灰色理论、三次指数平滑、三次多项式 等预测模型，在MATLAB下，对比该港集装箱吞吐量各模型预测拟合值与实际值的差异。分析了差异产生的原因及其单一预 测模型的局限性，提出了港口集装箱吞吐量组合预测法。其预测误差明显低于其它单模型。运用组合预测模型．可以降低误 差。提高预测精度。(A combination of MATLAB-based model in port throughput prediction of a Hong Kong 1998- 2007 container throughput for the measured data, the establishment of its container throughput of the gray theory, the three exponential smoothing, prediction models, such as cubic polynomial in MATLAB, the contrast of the Hong Kong container throughput of fitting the models to predict the value of the difference between the actual value. Analysis of the causes of differences and the limitations of a single prediction model, the combination of port container throughput prediction. Its prediction error was significantly lower than other single model. The use of combination forecasting model. Can reduce the error. Improve the prediction accuracy.)

GM（1，n）灰色预测模型，只有模型建立，计算，作图，检验过程略(GM (1, n) Grey forecasting model, only the model, calculation, mapping, testing process slightly)

Database management systems

对Mathematica的快速入门进行了详细的介绍。(Mathematica' s quick start on a detailed description.)

说明：  S变换是较新的时频分析工具，甩在低频段有较宽的的时间窗，以获得较高的频率分辨率；而在高频段时间窗窄，以获得较高的时间分辨率。这里给出了ST和GST（广义S变换）的函数。(S transform is a relatively new time-frequency analysis tool, left in the low frequency band has a wide time window in order to obtain higher frequency resolution and in high-frequency narrow time window in order to obtain higher temporal resolution. Here are given ST and GST (generalized S transform) function.)

西北工大《声学基础教案》1－3，很不错哦 西北工大《声学基础教案》1－3，很不错哦(West Completion "acoustic based lesson plans," 1-3. Oh, very good West Completion "acoustic based lesson plans," 1-3, oh very good)

图像中值滤波，用matlab实现了3×3邻域中值滤波，以及实现5×5十字形中值滤波。(Image filtering, using matlab to achieve the 33 neighborhood median filtering domain, and the realization of the value of 55 cross filtering.)

针对传统PID控制器参数整定不易的局限性，将模糊控制与PID相结合，构造了一个模糊自整定PID控制器,(Traditional PID controller parameter tuning is not easy the limitations of the fuzzy control and PID combination structure of a fuzzy self-tuning PID controller)

读取视频，检测并标记白色车辆目标，去除车道线和其他非圆碟形状的结构目标物，最后播放可视化后的视频(It will read the video, detect and mark vehicle targets,then lane and other targets of non-circles shape will be removed, at last,play the video after visualization.)