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arXiv 2209.02528cs.LGcs.AI
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重思对称矩阵分解:一种更通用且更优的聚类视角

Rethinking Symmetric Matrix Factorization: A More General and Better Clustering Perspective

Clemson University(克莱姆森大学)

Mengyuan Zhang, Kai Liu

AI总结:

针对现有对称非负矩阵分解算法约束单一、缺乏有效正则项的问题,本文提出带正则项的无强制非负约束的高效对称矩阵分解算法,并构建可适配因子矩阵不同约束的通用框架,提升聚类性能。

摘要:

非负矩阵分解(NMF)因强可解释性被广泛应用于聚类任务。在各类通用NMF问题中,对称NMF是一类特殊问题,在图聚类中发挥重要作用,其每个元素衡量数据点之间的相似度。现有多数对称NMF算法要求因子矩阵非负,且仅聚焦于最小化相似度矩阵与其近似结果的差距以实现聚类,未考虑其他可提升聚类效果的潜在正则项。本文探究无需非负约束的对称矩阵分解,提出一种带正则项的高效分解算法以提升聚类性能,还提出了一个更通用的框架,用于求解因子矩阵带有不同约束的对称矩阵分解问题。

英文摘要:

Nonnegative matrix factorization (NMF) is widely used for clustering with strong interpretability. Among general NMF problems, symmetric NMF is a special one that plays an important role in graph clustering where each element measures the similarity between data points. Most existing symmetric NMF algorithms require factor matrices to be nonnegative, and only focus on minimizing the gap between similarity matrix and its approximation for clustering, without giving a consideration to other potential regularization terms which can yield better clustering. In this paper, we explore factorizing a symmetric matrix that does not have to be nonnegative, presenting an efficient factorization algorithm with a regularization term to boost the clustering performance. Moreover, a more general framework is proposed to solve symmetric matrix factorization problems with different constraints on the factor matrices.

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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