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arXiv 2009.02117physics.soc-ph
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空间网络中通过逾渗骨架的相互依赖输运

Interdependent transport via percolation backbones in spatial networks

Bnaya Gross, Ivan Bonamassa, Shlomo Havlin

摘要:

网络中节点的功能通常用属于巨分支的结构特征来描述。然而,当处理像传输这样的问题时,一个更合适的功能性标准是节点属于网络的主干,在那里发生信息和其他物理量(如电流)的流动。在这里,我们研究渗透的相互依赖的电阻网络模型,并显示其耦合功能的空间性的影响。我们这样做的一个现实的空间网络模型,具有泊松分布的链接长度。我们发现,相互依赖的电阻网络是显着更脆弱的比他们的基于双稳态的同行,具有一阶相变的链接长度的相互巨组件仍然不断出现。我们解释这一明显的矛盾,通过追踪起源的相互依赖的运输的脆弱性增加所发挥的关键作用的摆弄结束。此外,我们解释这些差异,考虑一个异构的$k$核心渗流过程,使定义一个参数的家庭的功能标准,其约束变得越来越严格。我们的研究结果突出了节点功能的不同定义对耦合过程的集体属性的重要性,并提供了更好的理解在许多现实世界的网络中的相互依赖的运输问题。

英文摘要:

The functionality of nodes in a network is often described by the structural feature of belonging to the giant component. However, when dealing with problems like transport, a more appropriate functionality criterion is for a node to belong to the network's backbone, where the flow of information and of other physical quantities (such as current) occurs. Here we study percolation in a model of interdependent resistor networks and show the effect of spatiality on their coupled functioning. We do this on a realistic model of spatial networks, featuring a Poisson distribution of link-lengths. We find that interdependent resistor networks are significantly more vulnerable than their percolation-based counterparts, featuring first-order phase transitions at link-lengths where the mutual giant component still emerges continuously. We explain this apparent contradiction by tracing the origin of the increased vulnerability of interdependent transport to the crucial role played by the dandling ends. Moreover, we interpret these differences by considering an heterogeneous $k$-core percolation process which enables to define a one-parameter family of functionality criteria whose constraints become more and more stringent. Our results highlight the importance that different definitions of nodes functionality have on the collective properties of coupled processes, and provide better understanding of the problem of interdependent transport in many real-world networks.

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