arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1909.01059cs.CL
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基于注意力的成对多视角卷积神经网络在问答答案选择中的应用

Attention-based Pairwise Multi-Perspective Convolutional Neural Network for Answer Selection in Question Answering

Faculty of Computer Engineering, University of Isfahan(伊斯法罕大学计算机工程学院)

Jamshid Mozafari, Mohammad Ali Nematbakhsh, Afsaneh Fatemi

摘要:

在过去的几年中,问答和信息检索系统已经变得广泛使用。这些系统试图从原始文本源中找到所问问题的答案。这些系统的一个组成部分是答案选择,它从候选答案中选择最相关的答案。句法相似度主要用于计算相似度,但在最近的工作中,已经使用了深度神经网络,在这一领域取得了显着的进步。在这项研究中,提出了一个模型来选择最相关的答案的事实性问题的候选答案。该模型使用卷积神经网络,根据与问题的语义和句法相似性对候选答案进行排名。在本研究中,注意力机制和稀疏特征向量利用上下文敏感的问题和回答句子之间的相互作用。宽卷积增加了疑问词的重要性。成对排序用于学习可微表示以区分肯定和否定答案。我们的模型表明,TrecQA Raw在MAP中的表现强劲,比之前最先进的系统高出1.4%,在MRR中高出1.1%,同时没有使用额外的语法分析器和外部工具。结果表明,使用上下文敏感的问答句之间的相互作用,可以帮助更准确地找到正确的答案。

英文摘要:

Over the past few years, question answering and information retrieval systems have become widely used. These systems attempt to find the answer of the asked questions from raw text sources. A component of these systems is Answer Selection which selects the most relevant from candidate answers. Syntactic similarities were mostly used to compute the similarity, but in recent works, deep neural networks have been used, making a significant improvement in this field. In this research, a model is proposed to select the most relevant answers to the factoid question from the candidate answers. The proposed model ranks the candidate answers in terms of semantic and syntactic similarity to the question, using convolutional neural networks. In this research, Attention mechanism and Sparse feature vector use the context-sensitive interactions between questions and answer sentence. Wide convolution increases the importance of the interrogative word. Pairwise ranking is used to learn differentiable representations to distinguish positive and negative answers. Our model indicates strong performance on the TrecQA Raw beating previous state-of-the-art systems by 1.4% in MAP and 1.1% in MRR while using the benefits of no additional syntactic parsers and external tools. The results show that using context-sensitive interactions between question and answer sentences can help to find the correct answer more accurately.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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