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arXiv 1909.08381cs.LGstat.ML
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Laplacian矩阵的近似约简和聚类

Laplacian Matrix for Dimensionality Reduction and Clustering

Laurenz Wiskott, Fabian Schönfeld

摘要:

机器学习中的许多问题可以通过图来表示,图中的节点表示训练样本,边表示样本之间在相似性、时间接近性或标签信息方面的关系。图可以反过来用矩阵表示。一个特殊的例子是拉普拉斯矩阵,它允许我们为每个节点分配一个值,该值在强连接节点之间变化很小,在远连接节点之间变化更大。这种分配可以用于提取有用的特征表示,在低维空间中找到数据的良好嵌入,或者对原始样本执行聚类。在这些课堂讲稿中,我们首先介绍拉普拉斯矩阵,然后介绍围绕它设计的一些算法。

英文摘要:

Many problems in machine learning can be expressed by means of a graph with nodes representing training samples and edges representing the relationship between samples in terms of similarity, temporal proximity, or label information. Graphs can in turn be represented by matrices. A special example is the Laplacian matrix, which allows us to assign each node a value that varies only little between strongly connected nodes and more between distant nodes. Such an assignment can be used to extract a useful feature representation, find a good embedding of data in a low dimensional space, or perform clustering on the original samples. In these lecture notes we first introduce the Laplacian matrix and then present a small number of algorithms designed around it.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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