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Sampling is an established technique to scale graph neural networks to large graphs. Current approaches however assume the graphs to be homogeneous in terms of relations and ignore relation types, critically important in biomedical graphs.…

机器学习 · 计算机科学 2021-05-31 Arthur Feeney , Rishabh Gupta , Veronika Thost , Rico Angell , Gayathri Chandu , Yash Adhikari , Tengfei Ma

Message-passing graph neural networks (GNNs) excel at capturing local relationships but struggle with long-range dependencies in graphs. In contrast, graph transformers (GTs) enable global information exchange but often oversimplify the…

机器学习 · 计算机科学 2024-10-08 Dexiong Chen , Till Hendrik Schulz , Karsten Borgwardt

In this paper, we study the graph-based semi-supervised learning for classifying nodes in attributed networks, where the nodes and edges possess content information. Recent approaches like graph convolution networks and attention mechanisms…

机器学习 · 计算机科学 2024-03-14 Uchenna Akujuobi , Qiannan Zhang , Han Yufei , Xiangliang Zhang

In recent years, non-parametric methods utilizing random walks on graphs have been used to solve a wide range of machine learning problems, but in their simplest form they do not scale well due to the quadratic complexity. In this paper, a…

机器学习 · 计算机科学 2012-10-19 Saeed Amizadeh , Bo Thiesson , Milos Hauskrecht

The problem of missing link prediction in complex networks has attracted much attention recently. Two difficulties in link prediction are the sparsity and huge size of the target networks. Therefore, the design of an efficient and effective…

数据分析、统计与概率 · 物理学 2010-04-23 Weiping Liu , Linyuan Lu

Recommender systems are ubiquitous yet often difficult for users to control, and adjust if recommendation quality is poor. This has motivated conversational recommender systems (CRSs), with control provided through natural language…

In the last two decades we are witnessing a huge increase of valuable big data structured in the form of graphs or networks. To apply traditional machine learning and data analytic techniques to such data it is necessary to transform graphs…

机器学习 · 计算机科学 2024-03-22 Aleksandar Tomčić , Miloš Savić , Miloš Radovanović

A citation is a well-established mechanism for connecting scientific artifacts. Citation networks are used by citation analysis for a variety of reasons, prominently to give credit to scientists' work. However, because of current citation…

信息检索 · 计算机科学 2020-01-17 Tong Zeng , Longfeng Wu , Sarah Bratt , Daniel E. Acuna

Extracting relationships and interactions between different biological entities is still an extremely challenging problem but has not received much attention as much as extraction in other generic domains. In addition to the lack of…

计算与语言 · 计算机科学 2020-06-02 Abhinav Bhatt , Kaustubh D. Dhole

Relation Extraction (RE) is to predict the relation type of two entities that are mentioned in a piece of text, e.g., a sentence or a dialogue. When the given text is long, it is challenging to identify indicative words for the relation…

计算与语言 · 计算机科学 2023-04-26 Fuzhao Xue , Aixin Sun , Hao Zhang , Eng Siong Chng

Our goal is to quickly find top $k$ lists of nodes with the largest degrees in large complex networks. If the adjacency list of the network is known (not often the case in complex networks), a deterministic algorithm to find a node with the…

数据结构与算法 · 计算机科学 2012-02-16 Konstantin Avrachenkov , Nelly Litvak , Marina Sokol , Don Towsley

In order to assist security analysts in obtaining information pertaining to their network, such as novel vulnerabilities, exploits, or patches, information retrieval methods tailored to the security domain are needed. As labeled text data…

信息检索 · 计算机科学 2015-04-17 Corinne L. Jones , Robert A. Bridges , Kelly Huffer , John Goodall

Graph embedding maps a graph into a convenient vector-space representation for graph analysis and machine learning applications. Many graph embedding methods hinge on a sampling of context nodes based on random walks. However, random walks…

机器学习 · 计算机科学 2021-10-18 Sadamori Kojaku , Jisung Yoon , Isabel Constantino , Yong-Yeol Ahn

Many real-world systems involving higher-order interactions can be modeled by hypergraphs, where vertices represent the systemic units and hyperedges describe the interactions among them. In this paper, we focus on the problem of hyperlink…

社会与信息网络 · 计算机科学 2023-03-28 Xin-Jian Xu , Chong Deng , Li-Jie Zhang

Various applications in the areas of computational linguistics and artificial intelligence employ semantic similarity to solve challenging tasks, such as word sense disambiguation, text classification, information retrieval, machine…

计算与语言 · 计算机科学 2021-01-11 Mohannad AlMousa , Rachid Benlamri , Richard Khoury

Higher-order proximity preserved network embedding has attracted increasing attention. In particular, due to the superior scalability, random-walk-based network embedding has also been well developed, which could efficiently explore…

机器学习 · 计算机科学 2021-04-08 Jianxin Li , Cheng Ji , Hao Peng , Yu He , Yangqiu Song , Xinmiao Zhang , Fanzhang Peng

We present a novel graph-based neural network model for relation extraction. Our model treats multiple pairs in a sentence simultaneously and considers interactions among them. All the entities in a sentence are placed as nodes in a…

计算与语言 · 计算机科学 2020-03-16 Fenia Christopoulou , Makoto Miwa , Sophia Ananiadou

Recent advances in neural networks have solved common graph problems such as link prediction, node classification, node clustering, node recommendation by developing embeddings of entities and relations into vector spaces. Graph embeddings…

社会与信息网络 · 计算机科学 2021-11-19 Archit Parnami , Mayuri Deshpande , Anant Kumar Mishra , Minwoo Lee

Several state-of-the-art neural graph embedding methods are based on short random walks (stochastic processes) because of their ease of computation, simplicity in capturing complex local graph properties, scalability, and interpretibility.…

机器学习 · 计算机科学 2020-07-30 Charu Sharma , Jatin Chauhan , Manohar Kaul

In recent years, graph neural networks (GNNs) have gained increasing popularity and have shown very promising results for data that are represented by graphs. The majority of GNN architectures are designed based on developing new…

机器学习 · 统计学 2021-10-05 Anahita Iravanizad , Edgar Ivan Sanchez Medina , Martin Stoll