一种基于介数的双层复杂网络级联失效模型

A Cascading Failure Model of Double Layer Complex Networks Based on Betweenness

针对单层网络级联失效模型难以有效分析层状网络抗毁性的问题,基于介数分析法,研究了面向双层网络的级联失效模型。分析了网络两个层面之间信息(或能量)交互以及级联失效时的影响关系,并通过定义交互强度因子改进了节点介数计算方法,突出了节点业务对网络流量的影响。重设节点失效判定准则和负荷重分配准则,使网络两个层面在级联失效分析过程中得到关联。最后,仿真实验验证了模型有效性和可行性。

Cascading failure model for single layer network can＇t be used to analyse the invulnerability of layered networks effectively.Based on betweenness analytical method,this article studies the cascading failure model for double layer complex networks.Firstly,it analyses interaction between the two layers when the network is in state of common information（or energy）exchanging or in course of cascading failure.Secondly,by defining parameter of communicating intensity,algorithm of node betweenness is amended,so that affection of node function to network flux could be validated.And then,by resetting rules of node failure judging and load re-allotting,the two layers are associated in course of cascading failure.At last,through simulation experiments,effectiveness and maneuverability of the model is verified.