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Contagion spreading on complex networks with local deterministic dynamics

机译:传播在具有局部确定性的复杂网络上传播   动力学

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摘要

Typically, contagion strength is modeled by a transmission rate $\lambda$,whereby all nodes in a network are treated uniformly in a mean-fieldapproximation. However, local agents react differently to the same contagionbased on their local characteristics. Following our recent work [EPL\textbf{99}, 58002 (2012)], we investigate contagion spreading models withlocal dynamics on complex networks. We therefore quantify contagions by theirquality, $0 \leq \alpha \leq 1$, and follow their spreading as theirtransmission condition (fitness) is evaluated by local agents. We choosevarious deterministic local rules. Initial spreading with exponentialquality-dependent time scales is followed by a stationary state with aprevalence depending on the quality of the contagion. We also observe variousinteresting phenomena, for example, high prevalence without the participationof the hubs. This is in sharp contrast with the general belief that hubs play acentral role in a typical spreading process. We further study the role ofnetwork topology in various models and find that as long as small-world effectexists, the underlying topology does not contribute to the final stationarystate but only affects the initial spreading velocity.
机译:通常,传染强度由传输速率λ建模,从而网络中的所有节点均以均值场近似法统一处理。但是,本地代理基于其本地特征对相同的传染有不同的反应。继我们最近的工作[EPL \ textbf {99},58002(2012)]之后,我们研究了在复杂网络上具有局部动态的传染扩散模型。因此,我们通过其质量$ 0 \ leq \ alpha \ leq 1 $来量化传染病,并随着传播条件(适应性)由本地代理商评估,来跟踪它们的传播。我们选择各种确定性的本地规则。初始扩散具有与指数质量相关的时间标度,其后是具有固定状态,其传播状态取决于感染的质量。我们还观察到各种有趣的现象,例如,没有中心参与的高流行率。这与人们普遍认为集线器在典型的传播过程中起着中心作用的观点形成鲜明对比。我们进一步研究了网络拓扑在各种模型中的作用,发现只要存在小世界效应,基础拓扑就不会有助于最终的静止状态,而只会影响初始的传播速度。

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