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Thanks to information extraction and semantic Web efforts, search on unstructured text is increasingly refined using semantic annotations and structured knowledge bases. However, most users cannot become familiar with the schema of…

信息检索 · 计算机科学 2012-12-27 Uma Sawant , Soumen Chakrabarti

Given the recent advances and progress in Natural Language Processing (NLP), extraction of semantic relationships has been at the top of the research agenda in the last few years. This work has been mainly motivated by the fact that…

计算与语言 · 计算机科学 2020-04-30 Epaminondas Kapetanios , Vijayan Sugumaran , Anastassia Angelopoulou

In this paper, we propose convolutional neural networks for learning an optimal representation of question and answer sentences. Their main aspect is the use of relational information given by the matches between words from the two members…

计算与语言 · 计算机科学 2016-04-06 Aliaksei Severyn , Alessandro Moschitti

This paper studies the problem of predicting missing relationships between entities in knowledge graphs through learning their representations. Currently, the majority of existing link prediction models employ simple but intuitive scoring…

计算与语言 · 计算机科学 2019-11-20 Xiang Kong , Xianyang Chen , Eduard Hovy

Document-level relation extraction (RE) aims to extract the relations between entities from the input document that usually containing many difficultly-predicted entity pairs whose relations can only be predicted through relational…

计算与语言 · 计算机科学 2022-11-29 Liang Zhang , Jinsong Su , Yidong Chen , Zhongjian Miao , Zijun Min , Qingguo Hu , Xiaodong Shi

Embedding knowledge graphs (KGs) into continuous vector spaces is a focus of current research. Early works performed this task via simple models developed over KG triples. Recent attempts focused on either designing more complicated triple…

人工智能 · 计算机科学 2018-06-08 Boyang Ding , Quan Wang , Bin Wang , Li Guo

Network embeddings, which learn low-dimensional representations for each vertex in a large-scale network, have received considerable attention in recent years. For a wide range of applications, vertices in a network are typically…

计算与语言 · 计算机科学 2018-08-30 Dinghan Shen , Xinyuan Zhang , Ricardo Henao , Lawrence Carin

Low-dimensional embeddings for data from disparate sources play critical roles in multi-modal machine learning, multimedia information retrieval, and bioinformatics. In this paper, we propose a supervised dimensionality reduction method…

机器学习 · 计算机科学 2021-01-15 Yanjun Li , Bihan Wen , Hao Cheng , Yoram Bresler

Most work in relation extraction forms a prediction by looking at a short span of text within a single sentence containing a single entity pair mention. This approach often does not consider interactions across mentions, requires redundant…

计算与语言 · 计算机科学 2018-03-01 Patrick Verga , Emma Strubell , Andrew McCallum

Word embeddings are substantially successful in capturing semantic relations among words. However, these lexical semantics are difficult to be interpreted. Definition modeling provides a more intuitive way to evaluate embeddings by…

计算与语言 · 计算机科学 2020-07-21 Haitong Zhang , Yongping Du , Jiaxin Sun , Qingxiao Li

In practical scenario, relation extraction needs to first identify entity pairs that have relation and then assign a correct relation class. However, the number of non-relation entity pairs in context (negative instances) usually far…

计算与语言 · 计算机科学 2019-06-24 Wei Ye , Bo Li , Rui Xie , Zhonghao Sheng , Long Chen , Shikun Zhang

A relation tuple consists of two entities and the relation between them, and often such tuples are found in unstructured text. There may be multiple relation tuples present in a text and they may share one or both entities among them.…

计算与语言 · 计算机科学 2019-11-25 Tapas Nayak , Hwee Tou Ng

Relation extraction is the task of identifying relation instance between two entities given a corpus whereas Knowledge base modeling is the task of representing a knowledge base, in terms of relations between entities. This paper proposes…

计算与语言 · 计算机科学 2020-11-20 Xiaoyu Chen , Rohan Badlani

The objective of knowledge graph embedding is to encode both entities and relations of knowledge graphs into continuous low-dimensional vector spaces. Previously, most works focused on symbolic representation of knowledge graph with…

计算与语言 · 计算机科学 2016-12-14 Jiacheng Xu , Kan Chen , Xipeng Qiu , Xuanjing Huang

Implicit discourse relations bind smaller linguistic units into coherent texts. Automatic sense prediction for implicit relations is hard, because it requires understanding the semantics of the linked arguments. Furthermore, annotated…

计算与语言 · 计算机科学 2022-10-21 Murali Raghu Babu Balusu , Yangfeng Ji , Jacob Eisenstein

Learning a good representation of text is key to many recommendation applications. Examples include news recommendation where texts to be recommended are constantly published everyday. However, most existing recommendation techniques, such…

信息检索 · 计算机科学 2017-06-27 Ting Chen , Liangjie Hong , Yue Shi , Yizhou Sun

External knowledge,e.g., entities and entity descriptions, can help humans understand texts. Many works have been explored to include external knowledge in the pre-trained models. These methods, generally, design pre-training tasks and…

计算与语言 · 计算机科学 2022-08-19 Qinghua Zhao , Shuai Ma , Yuxuan Lei

Contextual word representations, typically trained on unstructured, unlabeled text, do not contain any explicit grounding to real world entities and are often unable to remember facts about those entities. We propose a general method to…

计算与语言 · 计算机科学 2019-11-01 Matthew E. Peters , Mark Neumann , Robert L. Logan , Roy Schwartz , Vidur Joshi , Sameer Singh , Noah A. Smith

In this paper, we use the framework of neural machine translation to learn joint sentence representations across six very different languages. Our aim is that a representation which is independent of the language, is likely to capture the…

计算与语言 · 计算机科学 2017-08-09 Holger Schwenk , Matthijs Douze

Distance based knowledge graph embedding methods show promising results on link prediction task, on which two topics have been widely studied: one is the ability to handle complex relations, such as N-to-1, 1-to-N and N-to-N, the other is…

计算与语言 · 计算机科学 2021-05-19 Linlin Chao , Jianshan He , Taifeng Wang , Wei Chu