work3

用matlab对高次插值时龙格现象的测试(Test on the the Runge phenomenon of high order interpolation using matlab)

IT IS MATLAB FILE FOR LOAD FLOW ANALYSIS USING NEWTON RAPHSON METHOD

用于添加噪声，达到去噪的目的.原始数据如果不太理想，去噪是常用的处理方法(Used to add noise to achieve the purpose of de-noising. If the original data is not ideal, de-noising is a common treatment method)

均值滤波：把每个像素周围的8个像素来做均值操作，可以平滑图像，速度快，算法简单，但是无法去掉噪声，只能微弱的减弱它。(The mean filtering: 8 pixels around each pixel do mean, you can smooth image, fast and simple algorithm, but can not get rid of the noise, only faint weakened it.)

用MATLAB程序语言实现最优控制的遗传算法( Genetic algorithm)

说明：  基于MATLAB的小波分析基础丛书，通俗易懂，很容易上手(Based on MATLAB-Wavelet Analysis basic books, user-friendly, it is easy to use)

一、实验要求 信号为两个正弦信号加高斯白噪声，各正弦信号的信噪比均为10dB，长度为N，信号频率分别为和，初始相位，取，取不同数值：0.3，0.25。为采样频率。分别用Levinson递推法和Burg法进行功率谱估计，并分析改变数据长度、模型阶数对谱估计结果的影响。(Power spectrum estimation)

本程序使用matlab编程，可用于水文长时间序列资料的趋势检验。(It is used to test the trend of long hydrological time series data.)

this code make random sea wave and analysis their parameter

说明：  无功功率分离谐波成分和基波成分，采用数学形态学滤波器作为低通滤波(Reactive power components of the separation of harmonic and fundamental components, the use of mathematical morphology filter as a low-pass filter)