传播过程中的协同作用:从剥削性到探索性觅食策略
Synergy in spreading processes: from exploitative to explorative foraging strategies
摘要:
提出了一种流行病学模型,它结合了协同效应,使感染性和/或易感性的主机是依赖于被感染的邻居的数量。建设性协同作用诱导一种剥削行为,导致快速入侵,感染大量的主机。干扰协同作用导致一个更慢,更稀疏的探索觅食策略,通过感染更少的主机穿越更大的距离。该模型可以被映射到一个动态的键渗流的空间相关性,影响传播的机制,但不影响流行病的临界行为。
英文摘要:
An epidemiological model which incorporates synergistic effects that allow the infectivity and/or susceptibility of hosts to be dependent on the number of infected neighbours is proposed. Constructive synergy induces an exploitative behaviour which results in a rapid invasion that infects a large number of hosts. Interfering synergy leads to a slower and sparser explorative foraging strategy that traverses larger distances by infecting fewer hosts. The model can be mapped to a dynamical bond-percolation with spatial correlations that affect the mechanism of spread but do not influence the critical behaviour of epidemics.
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