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LTSA[19] is based on the intuition that when a manifold is correctly unfolded, all of the tangent hyperplanes to the manifold will become aligned. It begins by computing the k-nearest neighbors of every point. It computes the tangent space at every point by computing the d-first principal components in each local neighborhood. It then optimizes to find an embedding that aligns the tangent spaces.

说明：  高等应用数学问题matlab求解，包括例题的全部代码 很适用的 (Matlab solving the problem of Higher Mathematics, including examples of all the code is applicable)

最小二乘法lsqcurvefit拟合载流子的迁移率(The least squares method lsqcurvefit fitting carrier mobility)

分数阶傅里叶变换程序，可以设置不同的分数阶参数，实现对信号的时频分析，并具有图形显示(Fractional Fourier transform procedure, different fractional order parameter can be set to achieve the time-frequency analysis, and has a graphical display)

进行RS分析的经典算法，用matlab编写(Analysis of the classical algorithm RS, written by MATLAB )

支持向量机导论 matlab中支持向量机算法的入门级经典教材(Introduction to matlab support vector machine support vector machine algorithm is the classic entry-level teaching materials)

用相似性方法做的特征点的匹配，比较了SSD与SAD方法的各自效果。(feature points matching method used by the similarity, and comparing the respective effects of the SSD and SAD methods.)

局部特征提取 局部特征提取 局部特征提取 局部特征提取 局部特征提取(Local feature extraction of local feature extraction of local feature extraction of local feature extraction of local feature extraction)

上传一个PCA的原代码，以便供大家互相交流和学习使用(the original code, in order for the mutual exchange and learning to use)

ocr mean data is to calculate ocr data.