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论文类型：期刊论文

发表时间：2009-04-01

发表刊物：INTERNATIONAL JOURNAL OF MODERN PHYSICS C

收录刊物：SCIE

卷号：20

期号：4

页面范围：585-595

ISSN号：0129-1831

关键字：Cascading failure; critical threshold; breakdown probability; scale free; BA network

摘要：In this paper, adopting the initial load of a node j to be L-j = k(j)(alpha), where k(j) is the degree of the node j and a is a tunable parameter that controls the strength of the initial load of a node, we propose a cascading model with a breakdown probability and explore cascading failures on a typical network, i.e., the Barabasi-Albert (BA) network with scale-free property. Assume that a failed node leads only to a redistribution of the load passing through it to its neighboring nodes. According to the simulation results, we find that BA networks reach the strongest robustness level against cascading failures when alpha = 1 and the robustness of networks has a positive correlation with the average degree (k), not relating to the different breakdown probabilities. In addition, it is found that the robustness against cascading failures has an inversely proportional relationship with the breakdown probability of an overload node. Finally, the numerical simulations are verified by the theoretical analysis.