arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1407.6071cs.SIphysics.soc-ph
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深度社区发现

Deep Community Detection

Pin-Yu Chen, Alfred O. Hero

摘要:

图中的深度社区是一个连接的组件,只有在从图的其余部分删除节点或边后才能看到。本文将检测深度社区的问题表述为多阶段节点移除,在每个阶段最大化一个新的中心性度量,称为局部Fiedler向量中心性(LFVC)。LFVC与代数连通性对节点或边移除的敏感性相关联。我们证明了一个贪婪的节点/边缘删除策略,连续最大化的LFVC的基础上,有界的性能损失相对于最佳的,但棘手的,组合批量删除策略。在一个随机块模型框架下,我们证明了贪婪LFVC策略可以在观测数量变大时以概率1提取深度社区。我们将贪婪LFVC策略应用于现实世界的社交网络数据集。与传统的社区发现方法相比,我们证明了改进的能力,以确定网络中的重要社区和关键成员。

英文摘要:

A deep community in a graph is a connected component that can only be seen after removal of nodes or edges from the rest of the graph. This paper formulates the problem of detecting deep communities as multi-stage node removal that maximizes a new centrality measure, called the local Fiedler vector centrality (LFVC), at each stage. The LFVC is associated with the sensitivity of algebraic connectivity to node or edge removals. We prove that a greedy node/edge removal strategy, based on successive maximization of LFVC, has bounded performance loss relative to the optimal, but intractable, combinatorial batch removal strategy. Under a stochastic block model framework, we show that the greedy LFVC strategy can extract deep communities with probability one as the number of observations becomes large. We apply the greedy LFVC strategy to real-world social network datasets. Compared with conventional community detection methods we demonstrate improved ability to identify important communities and key members in the network.

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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