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Extracting influential nodes on a social network for information diffusion

  • Masahiro KimuraEmail author
  • Kazumi Saito
  • Ryohei Nakano
  • Hiroshi Motoda
Article

Abstract

We address the combinatorial optimization problem of finding the most influential nodes on a large-scale social network for two widely-used fundamental stochastic diffusion models. The past study showed that a greedy strategy can give a good approximate solution to the problem. However, a conventional greedy method faces a computational problem. We propose a method of efficiently finding a good approximate solution to the problem under the greedy algorithm on the basis of bond percolation and graph theory, and compare the proposed method with the conventional method in terms of computational complexity in order to theoretically evaluate its effectiveness. The results show that the proposed method is expected to achieve a great reduction in computational cost. We further experimentally demonstrate that the proposed method is much more efficient than the conventional method using large-scale real-world networks including blog networks.

Keywords

Social network analysis Information diffusion model Influence maximization problem Bond percolation 

Notes

Acknowledgments

This work was partly supported by JSPS Grant-in-Aid for Scientific Research (C) (No. 20500147), and Asian Office of Aerospace Research and Development, Air Force Office of Scientific Research, US Air Force Research Laboratory under Grant No. AOARD-08-4027.

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Copyright information

© The Author(s) 2009

Authors and Affiliations

  • Masahiro Kimura
    • 1
    Email author
  • Kazumi Saito
    • 2
  • Ryohei Nakano
    • 3
  • Hiroshi Motoda
    • 4
  1. 1.Department of Electronics and InformaticsRyukoku UniversityOtsuJapan
  2. 2.School of Administration and InformaticsUniversity of ShizuokaShizuokaJapan
  3. 3.Department of Computer ScienceChubu UniversityAichiJapan
  4. 4.Institute of Scientific and Industrial ResearchOsaka UniversityOsakaJapan

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