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arXiv 1605.00482cs.CL
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大上下文文本中字符的组合句表示

Compositional Sentence Representation from Character within Large Context Text

Korea Advanced Institute of Science and Technology(韩国高等科学技术研究院)

Geonmin Kim, Hwaran Lee, Jisu Choi, Soo-young Lee

摘要:

本文描述了一个层次组合递归网络(HCRN),它包括一个3级层次的组合模型:字符,单词和句子。该模型的目的是克服两个问题的基础上表示一个句子的组成词序列。第一个是词嵌入中的数据稀疏问题,另一个是没有使用句间依赖。在HCRN中,单词表示是从字符中构建的,从而解决了数据稀疏性问题,并且在句子组成的级别上将句间依赖嵌入到句子表示中。我们采用分层学习方案,以减轻以端到端方式学习深度分层递归网络的优化困难。HCRN的定量和定性评估的对话行为分类任务。特别是,具有句间依赖性的句子表示能够捕获句子的隐式和显式语义,显着提高性能。最后,HCRN在SWBD-DAMSL数据库上的对话行为分类测试出错率为22.7%,达到了最先进的性能。

英文摘要:

This paper describes a Hierarchical Composition Recurrent Network (HCRN) consisting of a 3-level hierarchy of compositional models: character, word and sentence. This model is designed to overcome two problems of representing a sentence on the basis of a constituent word sequence. The first is a data-sparsity problem in word embedding, and the other is a no usage of inter-sentence dependency. In the HCRN, word representations are built from characters, thus resolving the data-sparsity problem, and inter-sentence dependency is embedded into sentence representation at the level of sentence composition. We adopt a hierarchy-wise learning scheme in order to alleviate the optimization difficulties of learning deep hierarchical recurrent network in end-to-end fashion. The HCRN was quantitatively and qualitatively evaluated on a dialogue act classification task. Especially, sentence representations with an inter-sentence dependency are able to capture both implicit and explicit semantics of sentence, significantly improving performance. In the end, the HCRN achieved state-of-the-art performance with a test error rate of 22.7% for dialogue act classification on the SWBD-DAMSL database.

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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