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arXiv 1909.08696physics.soc-phcond-mat.stat-mechnlin.AO
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网络中的主特征向量局部化和中心性:再论

Principal eigenvector localization and centrality in networks: revisited

Priodyuti Pradhan, Angeliya C. U., Sarika Jalan

摘要:

复杂网络或图提供了一个强大的框架,以了解个人的重要性和他们在现实世界的复杂系统的相互作用。几个图论的措施已被引入到访问的重要性,个人在系统中表示的网络。特别是,特征向量中心性(EC)测量已经非常流行,由于它的能力,在测量的重要性的节点的基础上,不仅数量的相互作用,他们获得的,但也特定的结构位置,他们在网络中。此外,某些结构特征的存在,如在网络中的高度节点的存在被认为是诱导的网络的邻接矩阵的主特征向量(PEV)的本地化转换。PEV的本地化已被证明是导致困难的中心性权重分配给基于EC的节点。我们重新审视PEV本地化及其与EC问题失败的关系,并通过使用简单的模型网络证明,除了PEV的本地化,PEV的离域也可能会造成困难,使用EC作为衡量排名的节点。我们的调查,同时提供了基本的洞察PEV本地化和网络中的节点的中心性之间的关系,表明对于网络具有离域PEV,它是更好地使用度中心性措施来排名的节点。

英文摘要:

Complex networks or graphs provide a powerful framework to understand importance of individuals and their interactions in real-world complex systems. Several graph theoretical measures have been introduced to access importance of the individual in systems represented by networks. Particularly, eigenvector centrality (EC) measure has been very popular due to its ability in measuring importance of the nodes based on not only number of interactions they acquire but also particular structural positions they have in the networks. Furthermore, the presence of certain structural features, such as the existence of high degree nodes in a network is recognized to induce localization transition of the principal eigenvector (PEV) of the network's adjacency matrix. Localization of PEV has been shown to cause difficulties in assigning centrality weights to the nodes based on the EC. We revisit PEV localization and its relation with failure of EC problem, and by using simple model networks demonstrate that in addition to the localization of the PEV, the delocalization of PEV may also create difficulties for using EC as a measure to rank the nodes. Our investigation while providing fundamental insight to the relation between PEV localization and centrality of nodes in networks, suggests that for the networks having delocalized PEVs, it is better to use degree centrality measure to rank the nodes.

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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