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arXiv 1105.4965physics.soc-phcs.SIphysics.data-anq-bio.PE
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大规模空间传染病传播中尺度涌现的演化

Evolution of scaling emergence in large-scale spatial epidemic spreading

Lin Wang, Xiang Li, Yi-Qing Zhang, Yan Zhang, Kan Zhang

摘要:

背景资料:Zipf定律和Heaps定律是标度概念的两个代表,在复杂性科学的研究中起着重要的作用。齐普夫定律和堆定律的共存使得人们对这两种标度之间的依赖关系有不同的理解,这一点至今仍难以澄清。方法/主要发现:在本文中,我们观察到标度的一个演化过程:Zipf定律和Heaps定律在初始时刻自然地形成共存,而交叉伴随着它们在更大时间内的不一致性的出现,然后达到稳定状态,其中Heaps定律仍然存在,严格的Zipf定律消失。大规模的空间传染病传播的情况下说明了这样的发现,和流行性疾病的经验结果支持的两个法律之间的关系的普遍分析,无论疾病的生物学细节。雇用美国(U.S.)国内航空运输和人口统计数据构建一个集合种群模型来模拟美国国家层面的大流行传播,我们发现基础设施的广泛异质性在规模化出现的演变中起着关键作用。结论/意义:大规模空间传染病传播的分析有助于理解标度的时间演化,表明Zipf定律和Heaps定律的共存依赖于流行病过程的集体动力学,而传染病传播的异质性表明在大流行病早期实施有针对性的遏制策略的重要性。

英文摘要:

Background: Zipf's law and Heaps' law are two representatives of the scaling concepts, which play a significant role in the study of complexity science. The coexistence of the Zipf's law and the Heaps' law motivates different understandings on the dependence between these two scalings, which is still hardly been clarified. Methodology/Principal Findings: In this article, we observe an evolution process of the scalings: the Zipf's law and the Heaps' law are naturally shaped to coexist at the initial time, while the crossover comes with the emergence of their inconsistency at the larger time before reaching a stable state, where the Heaps' law still exists with the disappearance of strict Zipf's law. Such findings are illustrated with a scenario of large-scale spatial epidemic spreading, and the empirical results of pandemic disease support a universal analysis of the relation between the two laws regardless of the biological details of disease. Employing the United States(U.S.) domestic air transportation and demographic data to construct a metapopulation model for simulating the pandemic spread at the U.S. country level, we uncover that the broad heterogeneity of the infrastructure plays a key role in the evolution of scaling emergence. Conclusions/Significance: The analyses of large-scale spatial epidemic spreading help understand the temporal evolution of scalings, indicating the coexistence of the Zipf's law and the Heaps' law depends on the collective dynamics of epidemic processes, and the heterogeneity of epidemic spread indicates the significance of performing targeted containment strategies at the early time of a pandemic disease.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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