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arXiv 1909.11287cs.CLcs.AI
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基于异构存储网络的面向任务的会话生成

Task-Oriented Conversation Generation Using Heterogeneous Memory Networks

College of Computer Science and Technology, Zhejiang University(浙江大学计算机科学与技术学院);DAMO Academy, Alibaba Group(阿里巴巴集团达摩院)

Zehao Lin, Xinjing Huang, Feng Ji, Haiqing Chen, Ying Zhang

摘要:

如何将外部知识整合到神经对话模型中对于对话系统表现得像真正的人类至关重要。为了解决这个问题,记忆网络通常是一个很好的选择,也是一种很有前途的方法。然而,现有的存储器网络在利用来自不同来源的异构信息时表现不佳。在本文中,我们提出了一种新的和通用的外部存储器网络称为异构存储器网络(HMN),同时利用用户的话语,对话历史和背景知识元组。在我们的方法中,历史顺序对话编码和存储到上下文感知的门控机制增强的记忆,而接地知识元组编码和存储到上下文无关的记忆。在解码过程中,增强HMN的解码器从这两个存储器和一般词汇表中循环选择一个响应话语中的每个单词。在多个真实世界数据集上的实验结果表明,HMN在大多数领域的性能明显优于最先进的数据驱动的面向任务的对话模型。

英文摘要:

How to incorporate external knowledge into a neural dialogue model is critically important for dialogue systems to behave like real humans. To handle this problem, memory networks are usually a great choice and a promising way. However, existing memory networks do not perform well when leveraging heterogeneous information from different sources. In this paper, we propose a novel and versatile external memory networks called Heterogeneous Memory Networks (HMNs), to simultaneously utilize user utterances, dialogue history and background knowledge tuples. In our method, historical sequential dialogues are encoded and stored into the context-aware memory enhanced by gating mechanism while grounding knowledge tuples are encoded and stored into the context-free memory. During decoding, the decoder augmented with HMNs recurrently selects each word in one response utterance from these two memories and a general vocabulary. Experimental results on multiple real-world datasets show that HMNs significantly outperform the state-of-the-art data-driven task-oriented dialogue models in most domains.

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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