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We propose a pre-training objective based on question answering (QA) for learning general-purpose contextual representations, motivated by the intuition that the representation of a phrase in a passage should encode all questions that the…

计算与语言 · 计算机科学 2022-03-17 Robin Jia , Mike Lewis , Luke Zettlemoyer

Question answering (QA) is an important natural language processing (NLP) task and has received much attention in academic research and industry communities. Existing QA studies assume that questions are raised by humans and answers are…

计算与语言 · 计算机科学 2019-01-15 Qing Yin , Guan Luo , Xiaodong Zhu , Qinghua Hu , Ou Wu

We describe an attentive encoder that combines tree-structured recursive neural networks and sequential recurrent neural networks for modelling sentence pairs. Since existing attentive models exert attention on the sequential structure, we…

计算与语言 · 计算机科学 2016-10-11 Yao Zhou , Cong Liu , Yan Pan

One of the main challenges in ranking is embedding the query and document pairs into a joint feature space, which can then be fed to a learning-to-rank algorithm. To achieve this representation, the conventional state of the art approaches…

计算与语言 · 计算机科学 2018-08-09 Dana Sagi , Tzoof Avny , Kira Radinsky , Eugene Agichtein

This paper presents a new network architecture called multi-head decoder for end-to-end speech recognition as an extension of a multi-head attention model. In the multi-head attention model, multiple attentions are calculated, and then,…

计算与语言 · 计算机科学 2018-07-31 Tomoki Hayashi , Shinji Watanabe , Tomoki Toda , Kazuya Takeda

Attention mechanism plays a dominant role in the sequence generation models and has been used to improve the performance of machine translation and abstractive text summarization. Different from neural machine translation, in the task of…

计算与语言 · 计算机科学 2020-04-09 Piji Li , Lidong Bing , Zhongyu Wei , Wai Lam

Multi-hop QA (Question Answering) is the task of finding the answer to a question across multiple documents. In recent years, a number of Deep Learning-based approaches have been proposed to tackle this complex task, as well as a few…

计算与语言 · 计算机科学 2023-01-30 Yunjie He , Philip John Gorinski , Ieva Staliunaite , Pontus Stenetorp

Question answering (QA) is a high-level ability of natural language processing. Most extractive ma-chine reading comprehension models focus on factoid questions (e.g., who, when, where) and restrict the output answer as a short and…

计算与语言 · 计算机科学 2021-10-25 Peng Cui , Dongyao Hu , Le Hu

Attention is typically used to select informative sub-phrases that are used for prediction. This paper investigates the novel use of attention as a form of feature augmentation, i.e, casted attention. We propose Multi-Cast Attention…

计算与语言 · 计算机科学 2018-06-05 Yi Tay , Luu Anh Tuan , Siu Cheung Hui

Recent insights on language and vision with neural networks have been successfully applied to simple single-image visual question answering. However, to tackle real-life question answering problems on multimedia collections such as personal…

计算机视觉与模式识别 · 计算机科学 2019-06-04 Junwei Liang , Lu Jiang , Liangliang Cao , Li-Jia Li , Alexander Hauptmann

While attention mechanisms have been proven to be effective in many NLP tasks, majority of them are data-driven. We propose a novel knowledge-attention encoder which incorporates prior knowledge from external lexical resources into deep…

计算与语言 · 计算机科学 2020-03-05 Pengfei Li , Kezhi Mao , Xuefeng Yang , Qi Li

Abstractive summarization aims to generate a shorter version of the document covering all the salient points in a compact and coherent fashion. On the other hand, query-based summarization highlights those points that are relevant in the…

计算与语言 · 计算机科学 2018-07-16 Preksha Nema , Mitesh Khapra , Anirban Laha , Balaraman Ravindran

In spoken question answering, the systems are designed to answer questions from contiguous text spans within the related speech transcripts. However, the most natural way that human seek or test their knowledge is via human conversations.…

计算与语言 · 计算机科学 2022-05-02 Chenyu You , Nuo Chen , Fenglin Liu , Shen Ge , Xian Wu , Yuexian Zou

Long-form question answering (LFQA) poses a challenge as it involves generating detailed answers in the form of paragraphs, which go beyond simple yes/no responses or short factual answers. While existing QA models excel in questions with…

计算与语言 · 计算机科学 2023-11-17 Pritom Saha Akash , Kashob Kumar Roy , Lucian Popa , Kevin Chen-Chuan Chang

Recently, the Visual Question Answering (VQA) task has gained increasing attention in artificial intelligence. Existing VQA methods mainly adopt the visual attention mechanism to associate the input question with corresponding image regions…

计算机视觉与模式识别 · 计算机科学 2018-03-02 Pan Lu , Hongsheng Li , Wei Zhang , Jianyong Wang , Xiaogang Wang

Recently, end-to-end memory networks have shown promising results on Question Answering task, which encode the past facts into an explicit memory and perform reasoning ability by making multiple computational steps on the memory. However,…

信息检索 · 计算机科学 2016-09-29 Jiaming Xu , Jing Shi , Yiqun Yao , Suncong Zheng , Bo Xu , Bo Xu

Visual attention, which assigns weights to image regions according to their relevance to a question, is considered as an indispensable part by most Visual Question Answering models. Although the questions may involve complex relations among…

计算机视觉与模式识别 · 计算机科学 2017-08-08 Chen Zhu , Yanpeng Zhao , Shuaiyi Huang , Kewei Tu , Yi Ma

Visual question answering (VQA) has witnessed great progress since May, 2015 as a classic problem unifying visual and textual data into a system. Many enlightening VQA works explore deep into the image and question encodings and fusing…

计算机视觉与模式识别 · 计算机科学 2017-02-23 Yuetan Lin , Zhangyang Pang , Donghui Wang , Yueting Zhuang

Machine comprehension(MC) style question answering is a representative problem in natural language processing. Previous methods rarely spend time on the improvement of encoding layer, especially the embedding of syntactic information and…

人工智能 · 计算机科学 2017-07-31 Boyuan Pan , Hao Li , Zhou Zhao , Bin Cao , Deng Cai , Xiaofei He

Recently proposed long-form question answering (QA) systems, supported by large language models (LLMs), have shown promising capabilities. Yet, attributing and verifying their generated abstractive answers can be difficult, and…

计算与语言 · 计算机科学 2024-07-02 Tal Schuster , Adam D. Lelkes , Haitian Sun , Jai Gupta , Jonathan Berant , William W. Cohen , Donald Metzler