A Context-aware Natural Language Generator for Dialogue Systems
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论文提出了一个nlg系统,这个 context-aware generator基于rnn和seq2seq方法,是完全可以从上下文数据和生成的数据中训练的。
- generator结构
NLG的功能是从一个表示inform
或request
的dialogue act
中生成一个自然语言句子。这篇文章的seq2seq generator是Dusek and Jurcicek(2016b)generator的提升版本,他的generator基于带有attention机制的seq2seq。首先先介绍这个baseline generator。
- Baseline Generator
这个generation有两个阶段,encoder阶段用带有LSTM的RNN将输入tokens序列编码成隐状态序列。
decoder阶段用隐状态h生成输出序列,这个阶段考虑attention机制,对所有encoder的隐状态求和,用带有tanh隐层的前馈网络加权。
DAs用一个序列表示:DA type, slot, value
,generator支持greedy decoding和beam search.
- 让Generator Context-aware
用三种修正来让generator的输出依赖于之前的context。
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