arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.09165cs.SIphysics.soc-ph
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通过随机抽样非观测链路实现无监督链接预测的快速评估

Towards Fast Evaluation of Unsupervised Link Prediction by Random Sampling Unobserved Links

Jingwei Wang, Yunlong Ma, Yun Yuan

摘要:

链接预测由于能够发现网络中隐藏的连接和预测网络中未来的链接而引起了广泛的关注。许多无监督的链接预测算法已经被提出来在各种网络中发现这些链接。然而,在无监督链接预测中存在评估难题。在大型网络中,未观测链路的数量远远超过观测链路的数量,因此量化所有未观测链路的存在可能性来评估这些算法是不现实的。在本文中,我们提出了一个新的评估范式,即采样未观察到的链接来解决这个问题。首先,我们证明了所提出的范式在理论上是可行的。然后,我们在不同上下文和大小的真实网络中进行了广泛的评估实验。结果表明,基于相似性的链接预测算法在大规模网络中即使在低采样率下也具有很高的稳定性,并且采样引起的评估时间退化是显著的。我们的发现对链接预测有着广泛的意义。

英文摘要:

Link prediction has aroused extensive attention since it can both discover hidden connections and predict future links in the networks. Many unsupervised link prediction algorithms have been proposed to find these links in a variety of networks. However, there is an evaluation conundrum in unsupervised link prediction. Unobserved links heavily outnumber observed links in large networks, so it is unrealistic to quantify the existence likelihood of all unobserved links to evaluate these algorithms. In this paper, we propose a new evaluation paradigm that is sampling unobserved links to address this problem. First, we demonstrate that the proposed paradigm is feasible in theory. Then, we perform extensive evaluation experiments in real-world networks of different contexts and sizes. The results show that the performance of similarity-based link prediction algorithms is highly stable even at a low sampling ratio in large networks, and the evaluation time degradation caused by sampling is striking. Our findings have broad implications for link prediction.

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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