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arXiv 2108.09649cs.LG
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聚类中距离分布的利用

The Exploitation of Distance Distributions for Clustering

Philipps-University of Marburg(马尔堡菲利普大学)

Michael C. Thrun

摘要:

虽然距离测量被用于许多机器学习算法中,但在使用先验知识的意义上,关于距离测量的上下文无关选择和评估的文献是有限的。在聚类分析中,目前的研究评估的距离测量的选择后,应用基于错误概率的无监督的方法,隐含地设置的目标,再现预定义的分区数据。这些研究使用的数据集群通常基于数据的上下文以及特定研究的自定义目标。根据数据上下文,距离分布的不同属性被判断为与适当的距离选择相关。然而,如果聚类分析是基于寻找数据的相似分区的任务,那么分区内距离应该小于分区间距离。通过系统地调查这一规格使用分布分析,通过镜像密度图,它表明,多峰距离分布是最好的聚类分析。因此,在无监督方法的评估阶段之前,用高斯混合物对距离分布进行建模是有利的。在几个人工数据集和自然数据集上进行了聚类实验。

英文摘要:

Although distance measures are used in many machine learning algorithms, the literature on the context-independent selection and evaluation of distance measures is limited in the sense that prior knowledge is used. In cluster analysis, current studies evaluate the choice of distance measure after applying unsupervised methods based on error probabilities, implicitly setting the goal of reproducing predefined partitions in data. Such studies use clusters of data that are often based on the context of the data as well as the custom goal of the specific study. Depending on the data context, different properties for distance distributions are judged to be relevant for appropriate distance selection. However, if cluster analysis is based on the task of finding similar partitions of data, then the intrapartition distances should be smaller than the interpartition distances. By systematically investigating this specification using distribution analysis through a mirrored-density plot, it is shown that multimodal distance distributions are preferable in cluster analysis. As a consequence, it is advantageous to model distance distributions with Gaussian mixtures prior to the evaluation phase of unsupervised methods. Experiments are performed on several artificial datasets and natural datasets for the task of clustering.

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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