qanqiu

Stretches contrast on the image and normalize image from 0 to 1. The main difference of this function to the standard stretching functions is that standard function finds global minimum and maximum on the image, then uses some low and high threshold values to normalize image (values below LowTHR are equated to LowTHR and values above HighTHR are equated to HighTHR)

电压暂降原始信号和小波分解程序，加入白噪后的信号及其小波分解程序，使用不同阈值方法去噪的比较，并对其波形读取，确定暂降的开始和结束点，功能强大。(Voltage sag original signal and wavelet decomposition process, after adding white noise signal and wavelet decomposition, the use of methods to compare different threshold de-noising, and its waveform is read to determine the sag of the start and end points, and powerful.)

磨床加工工件的数学建模一直是一个难题，本代码对磨床加工问题建立了一个好的模型(Mathematical modeling of grinding workpiece has been a problem, the problem of the grinding machine code created a good model)

说明：  完成从信源到目的端信息的传输与接收，信源信息经过QPSK调制，然后经过瑞利信道，在目的端仿真其译比特率（BER）。(BER simulation.)

Prony的matlab工具箱，很详细，使用它可以对信号进行prony变换和分析。(Prony matlab toolbox,the signal can be prony transformation and analysis.)

var模型的实现。针对var模型的算法，估计模型的参数。并对其进行检验(achieve var model. Var model for the algorithm, the estimated parameters of the model. And its test)

LLE算法基于swiss roll与s-curve数据集的运行结果，选取的样本点数为N=2000、k=12、 d=2进行的降维运算的结果,由运算结果可知在不同的数据集上LLE算法依然能够很好地保持数据在降维前后结构的特点。(The LLE algorithm is based on the running results of Swiss Roll and S-curve data sets, and the number of selected sample points is the result of dimensionality reduction of N=2000, k=12 and d=2. It is known that LLE algorithm still can maintain the characteristics of the data before and after dimensionality reduction well on different data sets.)

matlab的基本材料，很好的内容,可作为基本的起步材料(matlab basic materials, very good content)

filter use for signal

波器直线型结构转化成别的形式,这是一种,还有别的转化 (Filter into other forms linear structure, this is a kind of, still have other transformation)