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JACIII Vol.14 No.4 pp. 408-415
doi: 10.20965/jaciii.2010.p0408
(2010)

Paper:

An Efficient Algorithm for Optimizing Bipartite Modularity in Bipartite Networks

Xin Liu and Tsuyoshi Murata

Graduate School of Information Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan

Received:
December 7, 2009
Accepted:
March 29, 2010
Published:
May 20, 2010
Keywords:
community detection, modularity, bipartite network, graph partitioning, link mining
Abstract

Modularity evaluates the quality of a division of network nodes into communities, and modularity optimization is the most widely used class of methods for detecting communities in networks. In bipartite networks, there are correspondingly bipartite modularity and bipartite modularity optimization. LPAb, a very fast label propagation algorithm based on bipartite modularity optimization, tends to become stuck in poor local maxima, yielding suboptimal community divisions with low bipartite modularity. We therefore propose LPAb+, a hybrid algorithm combining modified LPAb, or LPAb’, and MSG, a multistep greedy agglomerative algorithm, with the objective of using MSG to drive LPAb out of local maxima. We use four commonly used real-world bipartite networks to demonstrate LPAb+ capability in detecting community divisions with remarkably higher bipartite modularity than LPAb. We show how LPAb+ outperforms other bipartite modularity optimization algorithms, without compromising speed.

Cite this article as:
X. Liu and T. Murata, “An Efficient Algorithm for Optimizing Bipartite Modularity in Bipartite Networks,” J. Adv. Comput. Intell. Intell. Inform., Vol.14, No.4, pp. 408-415, 2010.
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