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arXiv 1108.3286cs.SIphysics.soc-ph
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一种计算介数中心性的前瞻算法

A Lookahead algorithm to compute Betweenness Centrality

B Vignesh, Siddharth S, Shridhar Ramachandran, Dr. Sudarshan Iyengar, Dr. C Pandu Rangan

摘要:

介数中心性指数是分析大量网络的一个非常重要的中心性度量。尽管它在许多跨学科应用中具有重要意义,但其计算非常昂贵。目前已知的最快算法是Brandes的,它需要O(|V|| E|计算时间。在现实生活中,一个顶点或一组顶点从网络中顺序移除的情况非常频繁。当重复Brandes算法时,移除单个顶点时重新计算介数中心性变得昂贵。应当理解,随着网络规模的增加,介数中心性计算变得越来越昂贵,并且即使运行时间减少一小部分也会导致实际运行时间的显著减少。本文介绍的算法实现了相同的显着更少的时间比重复的Brandes算法。该算法也可以推广到一般情况。

英文摘要:

The Betweenness Centrality index is a very important centrality measure in the analysis of a large number of networks. Despite its significance in a lot of interdisciplinary applications, its computation is very expensive. The fastest known algorithm presently is by Brandes which takes O(|V || E|) time for computation. In real life scenarios, it happens very frequently that a single vertex or a set of vertices is sequentially removed from a network. The recomputation of Betweenness Centrality on removing a single vertex becomes expensive when the Brandes algorithm is repeated. It is to be understood that as the size of the network increases, Betweenness Centrality calculation becomes more and more expensive and even a decrease in running time by a small fraction results in a phenomenal decrease in the actual running time. The algorithm introduced in this paper achieves the same in a significantly lesser time than repetition of the Brandes algorithm. The algorithm can also be extended to a general case.

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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