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arXiv 1102.5085physics.soc-phcond-mat.stat-mechcs.SI
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网络的鲁棒性和模块化结构

Robustness and modular structure in networks

James P. Bagrow, Sune Lehmann, Yong-Yeol Ahn

摘要:

复杂网络由于其在自然界和我们的日常生活中的普遍存在而引起了人们的极大兴趣[1,2]。网络的一个关键属性是它对随机崩溃和故障的弹性[3-6],通常作为渗流问题[7-9]或通过建模级联故障[10-12]进行研究。许多复杂系统,从电网和互联网到大脑和社会[13-15],可以使用由小型密集连接的节点组组成的模块化网络进行建模[16,17]。这些模块经常重叠,网络元件属于多个模块[18,19]。然而,现有的鲁棒性工作并没有考虑重叠,模块化结构的作用。在这里,我们研究这些系统的鲁棒性元件的故障。我们的分析和经验表明,它是可能的模块本身成为解耦或非重叠以及网络解体之前。如果重叠的模块化组织在整体功能中发挥作用,网络可能比传统渗透理论预测的更脆弱。

英文摘要:

Complex networks have recently attracted much interest due to their prevalence in nature and our daily lives [1, 2]. A critical property of a network is its resilience to random breakdown and failure [3-6], typically studied as a percolation problem [7-9] or by modeling cascading failures [10-12]. Many complex systems, from power grids and the Internet to the brain and society [13-15], can be modeled using modular networks comprised of small, densely connected groups of nodes [16, 17]. These modules often overlap, with network elements belonging to multiple modules [18, 19]. Yet existing work on robustness has not considered the role of overlapping, modular structure. Here we study the robustness of these systems to the failure of elements. We show analytically and empirically that it is possible for the modules themselves to become uncoupled or non-overlapping well before the network disintegrates. If overlapping modular organization plays a role in overall functionality, networks may be far more vulnerable than predicted by conventional percolation theory.

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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