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arXiv 1401.7375cs.SIphysics.soc-ph
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在有向和无向网络中检测内聚和2-模式社区

Detecting Cohesive and 2-mode Communities in Directed and Undirected Networks

Jaewon Yang, Julian McAuley, Jure Leskovec

摘要:

网络是表示对象之间关系信息的通用语言。对网络进行建模、推理和总结的一种有效方法是发现具有共同连接模式的节点集。这样的集合通常被称为网络社区。网络社区发现的研究主要集中在无向网络中密集连接节点的社区识别。在本文中,我们开发了一种新的重叠社区发现的方法,可扩展到数以百万计的节点和边缘的网络,并沿两个维度推进研究:社区的连接结构,并使用边缘定向社区发现。首先,我们扩展了传统的网络社区的定义,通过观察节点可以以两种不同的方式紧密相连:在有凝聚力的社区中,节点相互链接,而在2模式社区中,节点以二分的方式链接,其中链接在两个分区之间占主导地位,而不是在它们内部。我们的方法成功地检测2模式以及凝聚力的社区,也可能重叠或分层嵌套。第二,虽然大多数现有的社区发现方法对待有向边缘,好像他们是无向的,我们的方法占边缘方向,并能够识别新的和有意义的社区结构,在有向和无向网络,使用数据从社会,生物和生态领域。

英文摘要:

Networks are a general language for representing relational information among objects. An effective way to model, reason about, and summarize networks, is to discover sets of nodes with common connectivity patterns. Such sets are commonly referred to as network communities. Research on network community detection has predominantly focused on identifying communities of densely connected nodes in undirected networks. In this paper we develop a novel overlapping community detection method that scales to networks of millions of nodes and edges and advances research along two dimensions: the connectivity structure of communities, and the use of edge directedness for community detection. First, we extend traditional definitions of network communities by building on the observation that nodes can be densely interlinked in two different ways: In cohesive communities nodes link to each other, while in 2-mode communities nodes link in a bipartite fashion, where links predominate between the two partitions rather than inside them. Our method successfully detects both 2-mode as well as cohesive communities, that may also overlap or be hierarchically nested. Second, while most existing community detection methods treat directed edges as though they were undirected, our method accounts for edge directions and is able to identify novel and meaningful community structures in both directed and undirected networks, using data from social, biological, and ecological domains.

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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