论文标题

HOSIM:高阶结构重要性方法用于多个本地社区检测

HoSIM: Higher-order Structural Importance based Method for Multiple Local Community Detection

论文作者

Li, Boyu, Wang, Meng, Hopcroft, John E., He, Kun

论文摘要

当地的社区发现最近引起了很多研究的关注,并且已经提出了许多方法,该方法发现了一个包含给定的查询节点集的社区。但是,节点可能属于网络中的几个社区,并检测所有被称为多个本地社区检测(MLCD)的查询节点集的社区,因为它可能会发现更多的潜在信息。 MLCD也更具挑战性,因为当查询节点属于多个社区时,它总是位于复杂的重叠地区和社区边际地区。因此,通过应用种子扩展方法检测多个社区为此类节点进行了不足。 在这项工作中,我们基于高阶结构重要性(HOSI)来解决MLCD。首先,为了有效估计高阶结构的影响,我们提出了一种称为主动随机步行的随机步行的新变体,以测量节点之间的HOSI评分。然后,我们提出了两个新的指标,以评估节点的子图的HOSI评分和节点的HOSI评分。根据提议的指标,我们提出了一种称为Hosim的新型算法,用于检测单个查询节点的多个局部社区。 Hosim执行了三阶段的处理,即子图抽样,核心成员识别和当地社区检测。关键思想是利用Hosi查找和确定与查询节点相关的社区的核心成员并优化生成的社区。广泛的实验说明了Hosim的有效性。

Local community detection has attracted much research attention recently, and many methods have been proposed for the single local community detection that finds a community containing the given set of query nodes. However, nodes may belong to several communities in the network, and detecting all the communities for the query node set, termed as the multiple local community detection (MLCD), is more important as it could uncover more potential information. MLCD is also more challenging because when a query node belongs to multiple communities, it always locates in the complicated overlapping region and the marginal region of communities. Accordingly, detecting multiple communities for such nodes by applying seed expansion methods is insufficient. In this work, we address the MLCD based on higher-order structural importance (HoSI). First, to effectively estimate the influence of higher-order structures, we propose a new variant of random walk called Active Random Walk to measure the HoSI score between nodes. Then, we propose two new metrics to evaluate the HoSI score of a subgraph to a node and the HoSI score of a node, respectively. Based on the proposed metrics, we present a novel algorithm called HoSIM to detect multiple local communities for a single query node. HoSIM enforces a three-stage processing, namely subgraph sampling, core member identification, and local community detection. The key idea is utilizing HoSI to find and identify the core members of communities relevant to the query node and optimize the generated communities. Extensive experiments illustrate the effectiveness of HoSIM.

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