异质无标度网络上中心性对灾害蔓延的影响

Influence of network centrality on disaster spreading in heterogenous scale-free network

基于一个普适性的灾害蔓延动力学模型,分别仿真分析了同质和异质两种网络结构上网络中心性对灾害蔓延的影响,着重讨论了在四种初始破坏节点选择策略下灾害蔓延过程及最终状态的差异。结果表明:对于四种攻击策略,同质网络和异质网络表现出同样的规律,网络对随机攻击具有比较强的鲁棒性,而对于目标攻击却显示出较强的脆弱性;另外,两种网络对于随机点、度及紧密度最大点攻击策略表现出同样的蔓延过程,而对于介数最大点则表现出明显区别。

Based on a general dynamical model for disaster spreading,both in homogeneous and heterogeneous network structures,the influences of network centrality on disaster spreading are analyzed by simulation,and the differences between final disaster spreading state are mainly discussed based on four initial node-choosing strategies.For the four strategies,it is shown that both the network structures show same rules.Network has a strong ability to resist random attacks but is fragile to resist intentional attacks.Moreover,the two networks,for the strategies of random node,degree and closeness centrality,shows the same spreading process,but for betweenness centrality are quietly different.