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Discovering Influential Nodes for SIS Models in Social Networks

  • Kazumi Saito
  • Masahiro Kimura
  • Hiroshi Motoda
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5808)

Abstract

We address the problem of efficiently discovering the influential nodes in a social network under the susceptible/infected/susceptible (SIS) model, a diffusion model where nodes are allowed to be activated multiple times. The computational complexity drastically increases because of this multiple activation property. We solve this problem by constructing a layered graph from the original social network with each layer added on top as the time proceeds, and applying the bond percolation with pruning and burnout strategies. We experimentally demonstrate that the proposed method gives much better solutions than the conventional methods that are solely based on the notion of centrality for social network analysis using two large-scale real-world networks (a blog network and a wikipedia network). We further show that the computational complexity of the proposed method is much smaller than the conventional naive probabilistic simulation method by a theoretical analysis and confirm this by experimentation. The properties of the influential nodes discovered are substantially different from those identified by the centrality-based heuristic methods.

Keywords

Greedy Algorithm Maximization Problem Pruning Method Linear Threshold Bond Percolation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Kazumi Saito
    • 1
  • Masahiro Kimura
    • 2
  • Hiroshi Motoda
    • 3
  1. 1.School of Administration and InformaticsUniversity of ShizuokaShizuokaJapan
  2. 2.Department of Electronics and InformaticsRyukoku University, OtsuShigaJapan
  3. 3.Institute of Scientific and Industrial ResearchOsaka UniversityOsakaJapan

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