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监督随机游走:预测和推荐社交网络中的链接

Supervised Random Walks: Predicting and Recommending Links in Social Networks

Facebook(脸书);Stanford University(斯坦福大学)

L. Backstrom, J. Leskovec

摘要:

预测链接的出现是网络中的一个基本问题。在链接预测问题中,我们得到一个网络的快照,并希望推断现有成员之间的哪些交互可能在不久的将来发生,或者我们遗漏了哪些现有交互。虽然这个问题已经得到了广泛的研究,如何有效地结合丰富的节点和边缘属性数据的网络结构的信息的挑战仍然很大程度上开放。我们开发了一种基于监督随机游走的算法,该算法自然地将网络结构的信息与节点和边缘级别的属性相结合。我们通过使用这些属性来引导图上的随机行走来实现这一点。我们制定了一个监督学习任务,其目标是学习一个函数,该函数为网络中的边分配强度,使得随机步行者更有可能访问将来将创建新链接的节点。我们开发了一种有效的训练算法,直接学习边缘强度估计函数。我们在Facebook社交图和大型协作网络上的实验表明,我们的方法优于最先进的无监督方法以及基于特征提取的方法。

英文摘要:

Predicting the occurrence of links is a fundamental problem in networks. In the link prediction problem we are given a snapshot of a network and would like to infer which interactions among existing members are likely to occur in the near future or which existing interactions are we missing. Although this problem has been extensively studied, the challenge of how to effectively combine the information from the network structure with rich node and edge attribute data remains largely open. We develop an algorithm based on Supervised Random Walks that naturally combines the information from the network structure with node and edge level attributes. We achieve this by using these attributes to guide a random walk on the graph. We formulate a supervised learning task where the goal is to learn a function that assigns strengths to edges in the network such that a random walker is more likely to visit the nodes to which new links will be created in the future. We develop an efficient training algorithm to directly learn the edge strength estimation function. Our experiments on the Facebook social graph and large collaboration networks show that our approach outperforms state-of-the-art unsupervised approaches as well as approaches that are based on feature extraction.

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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