PlotZoomandFFT

AdaBoost元算法属于boosting系统融合方法中最流行的一种，说白了就是一种串行训练并且最后加权累加的系统融合方法。 具体的流程是：每一个训练样例都赋予相同的权重，并且权重满足归一化，经过第一个分类器分类之后， 计算第一个分类器的权重alpha值，并且更新每一个训练样例的权重，然后再进行第二个分类器的训练，相同的方法....... 直到错误率为0或者达到指定的训练轮数，其中最后预测的标签计算是各系统*alpha的加权和，然后sign（预测值）。 可以看出，训练流程是串行的，并且训练样例的权重是一直在变化的，分错的样本的权重不断加大，正确的样本的权重不断减小。 AdaBoost元算法是boosting中流行的一种，还有其他的系统融合的方法，比如bagging方法以及随机森林。 对于非均衡样本的处理，一般可以通过欠抽样(undersampling)或者过抽样(oversampling)，欠抽样是削减样本的数目， 过抽样是重复的选取某些样本，最好的方法是两种进行结合的方法。 同时可以通过删除离决策边界比较远的样例。 (AdaBoost boosting systems dollar fusion algorithm is the most popular one, it plainly systems integration approach is a serial train and final weighted cumulative. Specific process is: Each training example is given equal weight, and the weights satisfy normalization, after the first classifiers after Calculating a first classifier weights alpha value for each sample and updates right weight training, and then the second classifier training, the same way ....... 0, or until the specified error rate training rounds, wherein the label is the calculation of the final prediction system* alpha weighted and then sign (predicted value). As can be seen, the training process is serial, and weight training examples is always changing, the right of the wrong sample weight continued to increase, the right to correct sample weight decreasing. AdaBoost algorithm is an element, as well as other methods of boosting popular systems integration, such as bagging and random forest method. For )

one neccessary program for neural network training in control process

哈工大教授的matlab教程的ppt学习资料。对入门级和高手来说都是很好的学习材料。(The HIT Professor matlab tutorial ppt learning materials. Entry-level and master is a very good learning materials.)

以227家公司的数据为基础进行kmeans clustering分组，用以预测50家未知公司的效益(Use 227 the companies data as the basis for kmeans clustering to predict the effectiveness of the 50 unknown companies)

说明：  PPC上面类似Matlab的语言环境，希望有pda的同学们喜欢(PPC above language similar to Matlab environment, and hope to have the students like pda)

通过利用雷达脉冲宽度与信噪比关系公式，分析雷达在三咱不同检测目标距离下的信噪比与脉冲宽度关系。(Through the use of the radar pulse width of the signal-to-noise ratio relationship formula to analyze the radar in three different detection target distance we signal-to-noise ratio and pulse width relationship.)

MATLAB编写的PID解耦控制程序，欢迎大家下载。(MATLAB prepared decoupling PID control program, welcome you to download.)

这是一种很好的画FFT谱matlab程序，里面讲解详细，一看就懂，很实用的(This is a very good picture FFT spectrum matlab, which explain in detail, a see understand, very practical )

plz give the matlabcode

EMD分解（利用在极值点序列首尾添加极值来处理问题）(EMD decomposition (using extreme points in both sequences to deal with the issue of extreme value to add))