arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.01265physics.soc-phphysics.data-anstat.AP
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作为随机行走模式的加权网络基序

Weighted network motifs as random walk patterns

Francesco Picciolo, Franco Ruzzenenti, Petter Holme, Rossana Mastrandrea

摘要:

在过去的二十年里,网络理论已经被证明是理解现实世界复杂系统的组织和功能的一个富有成效的范式。一种有助于这一努力的技术是识别功能上有影响力的子图,揭示潜在的进化过程。这种过度表示的子图,“图案”,在简单网络中受到了广泛的关注,其中边是开或关。然而,对于加权网络,模体分析仍然是未开发的。在这里,我们提出了一种新的方法-基于随机步行者采取固定的最大步数-研究有限大小的加权图案。我们引入了一个汇节点来平衡网络,并允许在先验的固定数量的步骤的随机步行者的配置检测。我们将这种方法应用于不同的真实网络,并选择了一个基于最大熵的特定基准模型来测试加权模体出现的显著性。我们发现,确定的相似性,使系统的分类,根据与特定配置相关的功能机制:经济网络表现出密切的模式,而从生态系统区分没有任何先验假设。

英文摘要:

Over the last two decades, network theory has shown to be a fruitful paradigm in understanding the organization and functioning of real-world complex systems. One technique helpful to this endeavor is identifying functionally influential subgraphs, shedding light on underlying evolutionary processes. Such overrepresented subgraphs, "motifs", have received much attention in simple networks, where edges are either on or off. However, for weighted networks, motif analysis is still undeveloped. Here, we proposed a novel methodology - based on a random walker taking a fixed maximum number of steps - to study weighted motifs of limited size. We introduce a sink node to balance the network and allow the detection of configurations within an a priori fixed number of steps for the random walker. We applied this approach to different real networks and selected a specific benchmark model based on maximum entropy to test the significance of weighted motifs occurrence. We found that identified similarities enable the classifications of systems according to functioning mechanisms associated with specific configurations: economic networks exhibit close patterns while differentiating from ecological systems without any a priori assumption.

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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