qinterp123

This document have matlab code for sine wave and inverse descrete fourier transform and to generate noise signal

1．熟悉matlab基础操作。 2．能够用Lagrange插值, Newton插值法对函数表进行一次、二次、三次插值，体会各种插值方法不同的特点。 (A. Familiar with matlab underlying operating. Two. With Lagrange interpolation, Newton interpolation function table once, quadratic, cubic interpolation, and appreciate the different characteristics of the various interpolation methods.)

Templates for impress

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))

Description: This M-file plots the truncated Fourier Series representation of a square wave as well as its amplitude and phase spectrum.

一种有效的数据预处理方法，主要用于matlab中，sar成像中(data processing)

自己编的最新的gquad方法，非常的好用(Own series the latest gquad method, very easy to use)

灰色预测模型能够通过以往的数据预知未来的数据，准确率高，鲁棒性强(Gray prediction model can predict the future through the past data of data, high accuracy and robustness)

维纳滤波，能滤除干扰噪声，提取有用信号。但是当输入信号的统计特性偏离设计条件，它就不再是最佳的了，这在实际应用中受到了限制。 (Wiener filter, to filter out interference noise, extract the useful signal. However, when the statistical characteristics of the input signal deviates from the design conditions, it is no longer optimal, which has been limited in practical application.)

潮流计算C++程序，计算ieee4 5 14 30 57 118 300(Power Flow calculation program)