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说明：  this code is important

这是个改进的PCA主元分析程序 可以实现数据降维和压缩(This is a PCA improved principal component analysis program can reduce the dimensionality of data compression )

LS-SVM算法，最小二乘支持向量机算法matlab程序(LS-SVM algorithm)

here are the codes in matlab for effects of temperature ,refractive index and length of the grating in FBG spectra,and reflection spectrum of TE and TM modes of 1D photonic crystals

这是第二能量熵的matlab代码，抑制载波型差分相位调制，一个师兄的毕设。( This is the second energy entropy matlab code, Suppressed carrier type differential phase modulation, A complete set of brothers.)

基于遗传算法优化神经网络，主要功能是用于曲线拟合(Neural network optimization based on genetic algorithms, the main function for curve fitting)

最小二乘法曲线拟合，可以实现利用最小二乘法拟合曲线，并显示图形，操作简单。(Least squares curve fitting, can be achieved using least squares curve fitting and display graphics, easy to operate.)

matlab，时间序列分析，分类，数据挖掘，聚类(time series classification)

说明：  kruskal 算法程序 解决最短路径问题 (kruskal shortest path algorithm to solve the issue of procedures)

离散傅里叶变换的性质的matlab仿真程序，包括线性特性、时移特性、频移特性、对称性和循环卷积等性质(The nature of the discrete Fourier transform matlab simulation program, including linearity, time-shift feature, the nature of the frequency shift characteristics, such as symmetry and circular convolution)