arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.12467physics.soc-phcs.SIphysics.data-an
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一种用于社区检测的新颖度量

A novel metric for community detection

Ke-ke Shang, Michael Small, Yan Wang, Di Yin, Shu Li

AI总结:

针对传统Modularity在社区检测中的局限,提出基于链路预测可预测性的新度量,比传统方法更具鲁棒性,能评估算法稳定性并揭露错误检测。

摘要:

在网络科学中,密集社区检测的研究近期引起了越来越多的关注,已有多种用于检测此类社区的度量被提出。最流行的度量——Modularity——基于所谓的社区内链接比社区间外部链接更密集的规则,已成为默认选择。然而,这一默认度量存在歧义,更糟的是,Modularity的所有增强都基于对形成“社区”含义的狭隘认知。我们认为,在特定但相当常见的系统中,社区内的链接不一定比社区间的链接更常见。相反,我们提出社区的定义特征是:社区内的链接比社区间的链接更具可预测性。本文基于社区对链路预测的影响,提出了一种直接基于此特征的社区检测新度量。我们发现我们的度量比传统的Modularity更具鲁棒性。因此,我们能够对同一检测算法在不同网络中的算法稳定性进行评估。我们的度量还能直接揭露错误的社区检测,并推断出检测算法的更多统计特征。

英文摘要:

Research into detection of dense communities has recently attracted increasing attention within network science, various metrics for detection of such communities have been proposed. The most popular metric -- Modularity -- is based on the so-called rule that the links within communities are denser than external links among communities, has become the default. However, this default metric suffers from ambiguity, and worse, all augmentations of modularity and based on a narrow intuition of what it means to form a "community". We argue that in specific, but quite common systems, links within a community are not necessarily more common than links between communities. Instead we propose that the defining characteristic of a community is that links are more predictable within a community rather than between communities. In this paper, based on the effect of communities on link prediction, we propose a novel metric for the community detection based directly on this feature. We find that our metric is more robustness than traditional modularity. Consequently, we can achieve an evaluation of algorithm stability for the same detection algorithm in different networks. Our metric also can directly uncover the false community detection, and infer more statistical characteristics for detection algorithms.

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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