Journal of Xidian University

Previous Articles     Next Articles

Improved approach to enhancing the robustness and effectiveness of networks

MU Caihong1,2;CHAI Wenyi1,2;LIU Yi1;LIU Jing3   

  1. (1. School of Electronic Engineering, Xidian Univ., Xian 710071, China;
    2. Ministry of Education Key Lab. of Intelligent Perception and Image Understanding, Xidian Univ., Xian 710071, China;
    3. School of Electronic Engineering, Xian Univ. of Posts & Telecommunications, Xian 710121, China)
  • Received:2017-07-19 Online:2018-08-20 Published:2018-09-25

Abstract:

Focusing on the problem of the vulnerability for scale-free networks under malicious attacks, an improved approach is proposed to enhance the robustness and effectiveness of the networks. Based on the existing robustness index and effectiveness index, this paper presents a new object function by combining these two indexes together reasonably. Then taking the onion-like structure as the heuristic information, a heuristic mixed searching operator is constructed. By adopting the simulated annealing algorithm combined with the heuristic mixed searching operator and a novel evaluation model based on the rate of change, the network structure is optimized iteratively, resulting in a network with higher robustness and effectiveness. Experimental results show that this new approach can improve the robustness and effectiveness of the initial network simultaneously.

Key words: robustness, effectiveness, scale-free networks, simulated annealing, heuristic methods