arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1504.06236cs.SIphysics.soc-ph
收藏

复杂网络中影响节点检测的改进方法

Improving detection of influential nodes in complex networks

Amir Sheikhahmadi, Mohammad A. Nematbakhsh, Arman Shokrollahi

摘要:

近年来,越来越多的研究致力于如何在复杂网络中有效地找到最有影响力的节点(种子)。有一些措施,提出了这一目的,例如,高度中心性措施反映了网络拓扑的重要性,并有一个合理的运行时性能,找到一组具有最高程度的节点,但他们没有一个令人满意的传播潜力,在网络中,由于有许多共同的邻居($\mbox{CN}^{(1)}$)和邻居的共同邻居($\mbox{CN}^{(2)}$)。这一缺陷在其他措施中也存在。在本文中,我们比较了高度中心性的措施与其他知名的措施,使用十个数据集,以找到一个比例的共同种子,由他们获得的种子集。因此,我们提出了一种改进的高度中心性测度(命名为DegreeDistance),并对其进行改进,以提高两个阶段(FIDD和SIDD)的精度,通过对已经选择的种子节点和被调查的非种子节点的共同邻居的数量设置阈值以被选择作为种子,以及考虑种子节点直接或通过它们的共同邻居对非种子节点的影响得分。为了评估度距离,FIDD和SIDD的准确性和运行时性能,它们被应用到8个大规模的网络,最后证明,SIDD显着优于其他知名的措施,并表现出相对更准确的性能,在确定最有影响力的节点。

英文摘要:

Recently an increasing amount of research is devoted to the question of how the most influential nodes (seeds) can be found effectively in a complex network. There are a number of measures proposed for this purpose, for instance, high-degree centrality measure reflects the importance of the network topology and has a reasonable runtime performance to find a set of nodes with highest degree, but they do not have a satisfactory dissemination potentiality in the network due to having many common neighbors ($\mbox{CN}^{(1)}$) and common neighbors of neighbors ($\mbox{CN}^{(2)}$). This flaw holds in other measures as well. In this paper, we compare high-degree centrality measure with other well-known measures using ten datasets in order to find a proportion for the common seeds in the seed sets obtained by them. We, thereof, propose an improved high-degree centrality measure (named DegreeDistance) and improve it to enhance accuracy in two phases, FIDD and SIDD, by putting a threshold on the number of common neighbors of already-selected seed nodes and a non-seed node which is under investigation to be selected as a seed as well as considering the influence score of seed nodes directly or through their common neighbors over the non-seed node. To evaluate the accuracy and runtime performance of DegreeDistance, FIDD, and SIDD, they are applied to eight large-scale networks and it finally turns out that SIDD dramatically outperforms other well-known measures and evinces comparatively more accurate performance in identifying the most influential 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。

↑