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We introduce sub-sentence encoder, a contrastively-learned contextual embedding model for fine-grained semantic representation of text. In contrast to the standard practice with sentence embeddings, where the meaning of an entire sequence…

计算与语言 · 计算机科学 2023-11-09 Sihao Chen , Hongming Zhang , Tong Chen , Ben Zhou , Wenhao Yu , Dian Yu , Baolin Peng , Hongwei Wang , Dan Roth , Dong Yu

Document-level relation extraction is a complex human process that requires logical inference to extract relationships between named entities in text. Existing approaches use graph-based neural models with words as nodes and edges as…

计算与语言 · 计算机科学 2019-09-04 Fenia Christopoulou , Makoto Miwa , Sophia Ananiadou

Relation extraction is an important but challenging task that aims to extract all hidden relational facts from the text. With the development of deep language models, relation extraction methods have achieved good performance on various…

计算与语言 · 计算机科学 2022-08-17 Sheng Zhang , Patrick Ng , Zhiguo Wang , Bing Xiang

Though language model text embeddings have revolutionized NLP research, their ability to capture high-level semantic information, such as relations between entities in text, is limited. In this paper, we propose a novel contrastive learning…

计算与语言 · 计算机科学 2023-10-10 Christos Theodoropoulos , James Henderson , Andrei C. Coman , Marie-Francine Moens

In this paper, we propose a novel method for joint entity and relation extraction from unstructured text by framing it as a conditional sequence generation problem. In contrast to conventional generative information extraction models that…

计算与语言 · 计算机科学 2024-01-17 Urchade Zaratiana , Nadi Tomeh , Pierre Holat , Thierry Charnois

Aspect Sentiment Triple Extraction (ASTE) is an emerging task in fine-grained sentiment analysis. Recent studies have employed Graph Neural Networks (GNN) to model the syntax-semantic relationships inherent in triplet elements. However,…

计算与语言 · 计算机科学 2024-02-26 Xiaowei Zhao , Yong Zhou , Xiujuan Xu

Usually, entity relation recognition systems either use a pipe-lined model that treats the entity tagging and relation identification as separate tasks or a joint model that simultaneously identifies the relation and entities. This paper…

计算与语言 · 计算机科学 2020-09-21 Venkata Sasank Pagolu

Models based on the transformer architecture, such as BERT, have marked a crucial step forward in the field of Natural Language Processing. Importantly, they allow the creation of word embeddings that capture important semantic information…

计算与语言 · 计算机科学 2021-01-01 Jacob Turton , David Vinson , Robert Elliott Smith

In NLP, a large volume of tasks involve pairwise comparison between two sequences (e.g. sentence similarity and paraphrase identification). Predominantly, two formulations are used for sentence-pair tasks: bi-encoders and cross-encoders.…

计算与语言 · 计算机科学 2022-03-15 Fangyu Liu , Yunlong Jiao , Jordan Massiah , Emine Yilmaz , Serhii Havrylov

Many modern entity recognition systems, including the current state-of-the-art de-identification systems, are based on bidirectional long short-term memory (biLSTM) units augmented by a conditional random field (CRF) sequence optimizer.…

计算与语言 · 计算机科学 2021-02-18 Kahyun Lee , Mehmet Kayaalp , Sam Henry , Özlem Uzuner

Entity resolution (record linkage or deduplication) is the process of identifying and linking duplicate records in databases. In this paper, we propose a Bayesian graphical approach for entity resolution that links records to latent…

统计方法学 · 统计学 2023-01-10 Neil G. Marchant , Benjamin I. P. Rubinstein , Rebecca C. Steorts

Overlapping speech diarization has been traditionally treated as a multi-label classification problem. In this paper, we reformulate this task as a single-label prediction problem by encoding multiple binary labels into a single label with…

声音 · 计算机科学 2022-04-01 Zhihao Du , Shiliang Zhang , Siqi Zheng , Zhijie Yan

For natural language understanding and generation, embedding concepts using an order-based representation is an essential task. Unlike traditional point vector based representation, an order-based representation imposes geometric…

计算与语言 · 计算机科学 2024-04-18 Croix Gyurek , Niloy Talukder , Mohammad Al Hasan

Entity Alignment (EA) aims to find the equivalent entities between two Knowledge Graphs (KGs). Existing methods usually encode the triples of entities as embeddings and learn to align the embeddings, which prevents the direct interaction…

计算与语言 · 计算机科学 2023-05-22 Yu Zhao , Yike Wu , Xiangrui Cai , Ying Zhang , Haiwei Zhang , Xiaojie Yuan

When extracting information from handwritten documents, text transcription and named entity recognition are usually faced as separate subsequent tasks. This has the disadvantage that errors in the first module affect heavily the performance…

计算机视觉与模式识别 · 计算机科学 2018-03-23 Manuel Carbonell , Mauricio Villegas , Alicia Fornés , Josep Lladós

Representation learning is a fundamental building block for analyzing entities in a database. While the existing embedding learning methods are effective in various data mining problems, their applicability is often limited because these…

机器学习 · 计算机科学 2020-09-24 Chin-Chia Michael Yeh , Dhruv Gelda , Zhongfang Zhuang , Yan Zheng , Liang Gou , Wei Zhang

Speech Entity Linking aims to recognize and disambiguate named entities in spoken languages. Conventional methods suffer gravely from the unfettered speech styles and the noisy transcripts generated by ASR systems. In this paper, we propose…

计算与语言 · 计算机科学 2022-09-30 Shen Huang , Yuchen Zhai , Xinwei Long , Yong Jiang , Xiaobin Wang , Yin Zhang , Pengjun Xie

Modern day Language Models see extensive use in text classification, yet this comes at significant computational cost. Compute-effective classification models are needed for low-resource environments, most notably on edge devices. We…

机器学习 · 计算机科学 2024-11-22 Stan Loosmore , Alexander Titus

In joint entity and relation extraction, existing work either sequentially encode task-specific features, leading to an imbalance in inter-task feature interaction where features extracted later have no direct contact with those that come…

计算与语言 · 计算机科学 2021-09-14 Zhiheng Yan , Chong Zhang , Jinlan Fu , Qi Zhang , Zhongyu Wei

Relation extraction (RE) is an important information extraction task which provides essential information to many NLP applications such as knowledge base population and question answering. In this paper, we present a novel generative model…

计算与语言 · 计算机科学 2022-03-01 Jian Ni , Gaetano Rossiello , Alfio Gliozzo , Radu Florian