Optimization of Network Invulnerability to Cascading Failure Based on Random-walk Betweenness Model

To prevent cascading failure of complex networks more efficiently, the best preventive strategy for cascading failure model based on random-walk betweenness (RB) should be investigated. Limited resource cascading failure model based on RB is proposed, which can be used for comparison of different preventive strategies. By the invulnerability simulation in scale-free networks, the efficiency of 2 proposed preventive strategies is compared. The results indicate that, load preferential preventive strategy is the best, but the effect of prevention is different among scale-free networks with different degree exponent. By the optimization of load preferential preventive strategy´s preferential exponent, dynamic invulnerability of complex networks is improved.