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Overlapping community detection in complex networks using multi-objective evolutionary algorithm

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Abstract

Community structure is an important topological property of complex networks, which has great significance for understanding the function and organization of networks. Generally, community detection can be formulated as a single-objective or multi-objective optimization problem. Most existing optimization-based community detection algorithms are only applicable to disjoint community structure. However, it has been shown that in most real-world networks, a node may belong to multiple communities implying overlapping community structure. In this paper, we propose a multi-objective evolutionary algorithm for identifying overlapping community structure in complex networks based on the framework of non-dominated sorting genetic algorithm. Two negatively correlated evaluation metrics of community structure, termed as negative fitness sum and unfitness sum, are adopted as the optimization objectives. In our algorithm, link-based adjacency representation of overlapping community structure and a population initialization method based on local expansion are proposed. Extensive experimental results on both synthetic and real-world networks demonstrate that the proposed algorithm is effective and promising in detecting overlapping community structure in complex networks.

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Acknowledgments

This research work is funded by the National Science Foundation of China (61271316), Shanghai Key Laboratory of Integrated Administration Technologies for Information Security, and Chinese National Engineering Laboratory for Information Content Analysis Technology.

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Authors and Affiliations

  1. Department of Electronic Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai, 200240, China

    Zhao Yuxin & Li Shenghong

  2. IBM China Research Laboratory, 399 Ke Yuan Road, Shanghai, 201203, China

    Zhao Yuxin & Jin Feng

Authors
  1. Zhao Yuxin
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  2. Li Shenghong
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  3. Jin Feng
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Correspondence to Zhao Yuxin.

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Communicated by Geraldo Nunes Silva.

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Yuxin, Z., Shenghong, L. & Feng, J. Overlapping community detection in complex networks using multi-objective evolutionary algorithm. Comp. Appl. Math. 36, 749–768 (2017). https://doi.org/10.1007/s40314-015-0260-1

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