Velocity and hierarchical spread of epidemic outbreaks in scale-free networks -: art. no. 178701
Velocity and hierarchical spread of epidemic outbreaks in scale-free networks -: art. no. 178701
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DOI：
10.1103/physrevlett.92.178701
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发表时间：
2004-04-30
影响因子：
8.6
通讯作者：
Vespignani, A
中科院分区：
文献类型：
--
作者：
Barthélemy, M;Barrat, A;Vespignani, A
我们研究了复杂网络的连通模式对流行病传播动力学的影响。爆发的增长时间尺度与网络度的波动成反比，这表明流行病在无标度分布的网络中几乎是瞬间传播的。这一特征与遵循精确分层动态的流行病传播相关联。一旦到达高度连接的枢纽，感染就会在较小的度类中以渐进级联的方式遍布网络。目前的研究结果是相关的自适应遏制战略的发展。
We study the effect of the connectivity pattern of complex networks on the propagation dynamics of epidemics. The growth time scale of outbreaks is inversely proportional to the network degree fluctuations, signaling that epidemics spread almost instantaneously in networks with scale-free degree distributions. This feature is associated with an epidemic propagation that follows a precise hierarchical dynamics. Once the highly connected hubs are reached, the infection pervades the network in a progressive cascade across smaller degree classes. The present results are relevant for the development of adaptive containment strategies.