小世界网络上流行病扩散控制策略

基于WS小世界网络和SIRS(Susceptible Infected Removed Susceptible)类流行病模型,通过数值模拟研究改变网络拓扑结构策略和改变网络拓扑结构与直接免疫相结合的策略对流行病扩散的控制。模拟结果显示,在第一种策略下,自我隔离的节点达到40%时疾病将在有限的时间内达到零感染态,而且随着自我隔离节点度被降低程度的升高疾病被控制的效果越好;在第二种策略下,疾病达到零感染态的速度比第一种策略下更快。两种策略都能够阻碍疾病的传染,控制疾病的蔓延,而且第二种策略的控制效果更佳。

Control Strategies of Epidemic Spreading in Small-world Networks

Based on WS small world networks and SIRS epidemic model,two kinds of epidemic control strategy which are the change of WS small world network topology and the combining changes in network structure and direct immunization were studied by numerical simulation.The results show that a disease will be achieved zero infection state within a limited time when self-isolation node reached 40%.In the first strategy a disease is controlled better with the decrease in the degree of self-isolation node.In the second strategy,the speed to reach zero infection state is faster.These two strategies can hinder and control the spread of the disease,and the second control strategy is better.