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arXiv 1606.03352cs.CLcs.NEstat.ML
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神经对话系统中的条件生成和快照学习

Conditional Generation and Snapshot Learning in Neural Dialogue Systems

Cambridge University(剑桥大学)

Tsung-Hsien Wen, Milica Gasic, Nikola Mrksic, Lina M. Rojas-Barahona, Pei-Hao Su, Stefan Ultes, David Vandyke, Steve Young

摘要:

最近,各种基于LSTM的条件语言模型(LM)已被应用于一系列的语言生成任务。在这项工作中,我们研究了各种模型架构和不同的方式来表示和聚合的源信息在一个端到端的神经对话系统框架。还提出了一种称为快照学习的方法,通过将同伴交叉熵目标函数应用于条件向量来促进从监督序列信号中的学习。实验和分析结果表明,首先,竞争之间发生的条件向量和LM,不同的架构提供了不同的权衡两者之间。其次,条件向量的区分能力和透明度是提供模型可解释性和更好性能的关键。第三,快照学习导致一致的性能改进,而与使用哪种架构无关。

英文摘要:

Recently a variety of LSTM-based conditional language models (LM) have been applied across a range of language generation tasks. In this work we study various model architectures and different ways to represent and aggregate the source information in an end-to-end neural dialogue system framework. A method called snapshot learning is also proposed to facilitate learning from supervised sequential signals by applying a companion cross-entropy objective function to the conditioning vector. The experimental and analytical results demonstrate firstly that competition occurs between the conditioning vector and the LM, and the differing architectures provide different trade-offs between the two. Secondly, the discriminative power and transparency of the conditioning vector is key to providing both model interpretability and better performance. Thirdly, snapshot learning leads to consistent performance improvements independent of which architecture is used.

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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