arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.03609cs.LGstat.ML
收藏

理解演化图中的高阶结构:基于单纯形复形的核估计方法

Understanding Higher-order Structures in Evolving Graphs: A Simplicial Complex based Kernel Estimation Approach

Indian Institute of Technology Hyderabad(印度理工学院海得拉巴分校);The University of Tokyo(东京大学)

Manohar Kaul, Masaaki Imaizumi

摘要:

动态图中充满了高阶交互,例如生物网络中的共同作者关系和蛋白质-蛋白质交互,它们自然会同时出现在两个以上的节点之间。尽管普遍存在这样的高阶相互作用,有限的注意力已经支付给流行的成对链接预测问题的高阶对应。现有的高阶结构预测方法大多是基于启发式特征提取过程,在实践中效果良好,但缺乏理论保证。这种算法主要集中在预测图的静态快照中的链接。此外,这些基于进化论的方法不能有效地利用和受益于已经存在于高阶结构内的潜在子结构的知识。在本文中,我们克服了这些障碍,捕捉高阶相互作用简洁地作为\textit{simplices},模型的邻域面向量,并开发了一个非参数核估计的单纯形,从时间过程的角度来看,图形快照序列)。我们的方法大大优于几个基线高阶预测方法。作为一个理论成果,我们证明了一致性和渐近正态性的Wasserstein距离的估计使用Stein的方法。

英文摘要:

Dynamic graphs are rife with higher-order interactions, such as co-authorship relationships and protein-protein interactions in biological networks, that naturally arise between more than two nodes at once. In spite of the ubiquitous presence of such higher-order interactions, limited attention has been paid to the higher-order counterpart of the popular pairwise link prediction problem. Existing higher-order structure prediction methods are mostly based on heuristic feature extraction procedures, which work well in practice but lack theoretical guarantees. Such heuristics are primarily focused on predicting links in a static snapshot of the graph. Moreover, these heuristic-based methods fail to effectively utilize and benefit from the knowledge of latent substructures already present within the higher-order structures. In this paper, we overcome these obstacles by capturing higher-order interactions succinctly as \textit{simplices}, model their neighborhood by face-vectors, and develop a nonparametric kernel estimator for simplices that views the evolving graph from the perspective of a time process (i.e., a sequence of graph snapshots). Our method substantially outperforms several baseline higher-order prediction methods. As a theoretical achievement, we prove the consistency and asymptotic normality in terms of the Wasserstein distance of our estimator using Stein's method.

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。

↑