arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1706.02027cs.CL
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作为双重任务的问答和问题生成

Question Answering and Question Generation as Dual Tasks

Microsoft Research Asia(微软亚洲研究院);Beihang University(北京航空航天大学)

Duyu Tang, Nan Duan, Tao Qin, Zhao Yan, Ming Zhou

摘要:

本文研究了联合问答和问题生成问题。我们的直觉是,QA和QG有着内在的联系,这两个任务可以相互促进。一方面,QA模型判断QG模型生成的问题是否与答案相关。另一方面,QG模型提供了在给定答案的情况下生成问题的概率,这是一个有用的证据,反过来又促进了QA。在本文中,我们把QA和QG视为双重任务。我们提出了一个训练框架,同时训练QA和QG模型,并明确利用它们的概率相关性来指导这两个模型的训练过程。我们实现了一个基于序列到序列学习的QG模型和一个基于递归神经网络的QA模型。由于QA和QG模型的所有组件都是可微的,因此这两个模型中涉及的所有参数都可以通过反向传播来学习。我们在三个数据集上进行了实验。实证结果表明,我们的训练框架提高了QA和QG任务。改进的QA模型在所有三个数据集上使用强基线方法进行验证。

英文摘要:

We study the problem of joint question answering (QA) and question generation (QG) in this paper. Our intuition is that QA and QG have intrinsic connections and these two tasks could improve each other. On one side, the QA model judges whether the generated question of a QG model is relevant to the answer. On the other side, the QG model provides the probability of generating a question given the answer, which is a useful evidence that in turn facilitates QA. In this paper we regard QA and QG as dual tasks. We propose a training framework that trains the models of QA and QG simultaneously, and explicitly leverages their probabilistic correlation to guide the training process of both models. We implement a QG model based on sequence-to-sequence learning, and a QA model based on recurrent neural network. As all the components of the QA and QG models are differentiable, all the parameters involved in these two models could be conventionally learned with back propagation. We conduct experiments on three datasets. Empirical results show that our training framework improves both QA and QG tasks. The improved QA model performs comparably with strong baseline approaches on all three datasets.

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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