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arXiv 1809.00465physics.soc-phcs.SI
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相似性指标的性能及其与链路预测关系的研究:一个两状态随机网络的例子

A study on the performance of similarity indices and its relationship with link prediction: a two-state random network case

Min-Woo Ahn, Woo-Sung Jung

摘要:

相似性指数度量复杂网络中节点对的拓扑接近程度。许多相似性指数已被定义和研究,但结构上的相似性指数的性能的依赖性还没有得到充分的研究。在这项研究中,我们研究了相似性指标的性能和网络的结构属性之间的关系,采用两个状态的随机网络。两状态网络中的节点具有初始给定的二进制类型,并且连接概率由节点对的状态确定。相似性指数的性能影响链接的数量和内部连接与内部连接的比例。相似性指数根据其类型具有不同的特征。局部指数在小规模网络中表现良好,并且不依赖于结构是内部主导还是内部主导。相比之下,全球指数在大规模网络中表现更好,而一些此类指数在互主导结构中表现不佳。我们还发现,在模型网络和经验网络中,链接预测性能和相似性性能都是相关的。这种关系意味着,当节点类型的元数据不可用时,链接预测性能可以用作相似性指数性能的近似值。这种关系可能有助于为给定的网络找到合适的索引。

英文摘要:

Similarity index measures the topological proximity of node pairs in a complex network. Numerous similarity indices have been defined and investigated, but the dependency of structure on the performance of similarity indices has not been sufficiently investigated. In this study, we investigated the relationship between the performance of similarity indices and structural properties of a network by employing a two-state random network. A node in a two-state network has binary types that are initially given, and a connection probability is determined from the state of the node pair. The performance of similarity indices affects the number of links and the ratio of intra-connections to inter-connections. Similarity indices have different characteristics depending on their type. Local indices perform well in small-size networks and do not depend on whether the structure is intra-dominant or inter-dominant. In contrast, global indices perform better in large-size networks, and some such indices do not perform well in an inter-dominant structure. We also found that link prediction performance and the performance of similarity are correlated in both model networks and empirical networks. This relationship implies that link prediction performance can be used as an approximation for the performance of the similarity index when metadata for node types are unavailable. This relationship may help to find the appropriate index for given networks.

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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