网络中的链路预测(Link Prediction)是指如何通过已知的网络节点以及网络结构等信息预测网络中尚未产生连边的两个节点之间产生链接的可能性。这种预测既包含了对未知链接(exist yet unknown links)的预测也包含了对未来链接(future links)的预测。该问题的研究在理论和应用两个方面都具有重要的意义和价值 。

VIP内容

论文题目: MAGNN: Metapath Aggregated Graph Neural Network for Heterogeneous Graph Embedding

摘要: 大量真实世界的图或网络本质上是异构的,涉及节点类型和关系类型的多样性。异构图嵌入是将异构图的丰富结构和语义信息嵌入到低维节点表示中。现有的模型通常在异构图中定义多个元数据来捕获复合关系并指导邻居选择。但是,这些模型要么忽略节点内容特性,要么沿着元路径丢弃中间节点,要么只考虑一个元路径。为了解决这三个局限性,我们提出了一种新的集合图神经网络模型来提高最终性能。具体来说,MAGNN使用了三个主要组件,即,节点内容转换封装输入节点属性,元内聚合合并中间语义节点,元间聚合合并来自多个元的消息。在三个真实世界的异构图数据集上进行了大量的节点分类、节点聚类和链路预测实验,结果表明MAGNN的预测结果比最先进的基线更准确。

成为VIP会员查看完整内容
0
83

最新内容

Network embedding maps the nodes of a given network into a low-dimensional space such that the semantic similarities among the nodes can be effectively inferred. Most existing approaches use inner-product of node embedding to measure the similarity between nodes leading to the fact that they lack the capacity to capture complex relationships among nodes. Besides, they take the path in the network just as structural auxiliary information when inferring node embeddings, while paths in the network are formed with rich user informations which are semantically relevant and cannot be ignored. In this paper, We propose a novel method called Network Embedding on the Metric of Relation, abbreviated as NEMR, which can learn the embeddings of nodes in a relational metric space efficiently. First, our NEMR models the relationships among nodes in a metric space with deep learning methods including variational inference that maps the relationship of nodes to a gaussian distribution so as to capture the uncertainties. Secondly, our NEMR considers not only the equivalence of multiple-paths but also the natural order of a single-path when inferring embeddings of nodes, which makes NEMR can capture the multiple relationships among nodes since multiple paths contain rich user information, e.g., age, hobby and profession. Experimental results on several public datasets show that the NEMR outperforms the state-of-the-art methods on relevant inference tasks including link prediction and node classification.

0
0
下载
预览

最新论文

Network embedding maps the nodes of a given network into a low-dimensional space such that the semantic similarities among the nodes can be effectively inferred. Most existing approaches use inner-product of node embedding to measure the similarity between nodes leading to the fact that they lack the capacity to capture complex relationships among nodes. Besides, they take the path in the network just as structural auxiliary information when inferring node embeddings, while paths in the network are formed with rich user informations which are semantically relevant and cannot be ignored. In this paper, We propose a novel method called Network Embedding on the Metric of Relation, abbreviated as NEMR, which can learn the embeddings of nodes in a relational metric space efficiently. First, our NEMR models the relationships among nodes in a metric space with deep learning methods including variational inference that maps the relationship of nodes to a gaussian distribution so as to capture the uncertainties. Secondly, our NEMR considers not only the equivalence of multiple-paths but also the natural order of a single-path when inferring embeddings of nodes, which makes NEMR can capture the multiple relationships among nodes since multiple paths contain rich user information, e.g., age, hobby and profession. Experimental results on several public datasets show that the NEMR outperforms the state-of-the-art methods on relevant inference tasks including link prediction and node classification.

0
0
下载
预览
Top