least_square

本书共分5篇48章。主要介绍MATLAB提供的统计、优化、偏微分方程数值解、样条和曲线拟合等5个与工程计算关系密切的工具箱。其中统计工具箱、优化工具箱、偏微分方程数值解工具箱和样条工具箱的介绍在国内图书中最全面，并且实例丰富，本书的内容紧随版本的最新变化。(Matlab Engineering Mathematics)

说明：  optimal P and Q of DG(disributed generator)

用平面波展开法计算二维声子晶体带隙,这个有中文注释，看得明白，二维声子晶体FDTD方法计算禁带宽度的例子。( Computation Method D phononic bandgap plane wave, The Chinese have a comment, understand it, Dimensional phononic crystals FDTD method calculation examples band gap.)

LSE算法应用，很好用，请使用(LSE algorithm applications, very good use, please use)

Code to estimate Hurst Exponent

说明：  基于矩阵特征值分解的功率谱估计包括特征向量估计和MUSIC估计，这两种估计方法均为非参数估计方法(Based on Eigenvalue Decomposition of power spectral estimation, including estimation and MUSIC eigenvector estimates, these two estimation methods are non-parameter estimation)

首先信号建模，两种频率的正弦信号叠加，加白噪声和脉冲信号；对叠加信号滤波并提取特征(First, signal modeling, the two frequencies of the sinusoidal signal superimposed with white noise and the pulse signal superimposed signal filtering and extract features)

1d shrodinger equation with CN method

高超声速飞行器离散滑模控制器设计/非线性模型(Discrete sliding mode controller for hypersonic vehicle design/nonlinear model)

高斯厄尔米特积分代码，实现高斯积分功能，环境为matlab(Gauss int)