2DPhC_PWEBandstructure

重力频率域位场延拓。将观测面的位场数据（a20_mag.gtd）向上延拓3.3m，之后与已知的理论值（a53_mag.grd）进行比较，计算其均方误差；反之，将观测面的位场数据（a53_mag.grd）向下延拓3.3m，之后与已知的理论值（a20_mag.grd）进行比较，计算其均方误差。(gravity frequency field extend)

说明：  该文件内容用于相空间重构参数时间延迟和嵌入维数的计算，时间延迟的计算包含去偏复自相关函数法和互信息法，嵌入维数的甲酸包含G-P算法和FNN算法。(The contents of this file are used to calculate the time delay and embedding dimension of phase space reconstruction parameters. The calculation of time delay includes depolarization complex autocorrelation function method and mutual information method. The embedding dimension of formic acid includes G-P algorithm and FNN algorithm.)

BP神经网络的整个训练过程,matlab编写的元胞自动机，独立成分分析算法降低原始数据噪声。( The entire training process BP neural network, matlab prepared cellular automata, Independent component analysis algorithm reduces the raw data noise.)

非负矩阵分解在矩阵计算中具有重要意义，这是NMF非负矩阵分解实验室完整代码。(non-negtive resolution)

实现UTM平面坐标系到经纬度的双向转换，是地理方面应用的好助手(UTM plane coordinate system to achieve two-way conversion of latitude and longitude, is a good helper geographic applications)

说明：  基2基4基8以及分裂基的fft算法，代码效率很高。是难得一见的好代码。应用范围很广。(Radix-2-4-based 8 and split fft-based algorithm, a high code efficiency. Is a rare good code. Application of a very wide scope.)

用MATLAB实现单因素/两因素重复测量方差分析，自带工具包中只有非重复测量的方差分析函数ANOVA。anova_rm实现单因素；rm_anova2实现两因素( function stats = rm_anova2(Y,S,F1,F2,FACTNAMES) Two-factor, within-subject repeated measures ANOVA.For designs with two within-subject factors. function [p, table] = anova_rm(X, displayopt)Single factor, repeated measures ANOVA.)

C++ SGP4 Satellite Library

计算按频率抽取的基4快速傅里叶变换算法，与基2FFT相比，基4FFT的乘法量约减少25 。(Calculating frequency taken by fast Fourier transform algorithm base 4, compared with the base 2FFT the base 4FFT multiplication about 25 less.)

说明：  基于欧拉距离的KNN分类器，可自行调节map和预测点的位置。运行时首先显示分布散点图，之后输出预测值(Here is a KNN classifier based on Euler distance with self-adjusting map and prediction point positions. The distribution scatter will plot displayed map at first, then show the predicted value.)