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arXiv 2006.01592cs.CL
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考虑不一致损失的评论摘要和情感分类统一双视图模型

A Unified Dual-view Model for Review Summarization and Sentiment Classification with Inconsistency Loss

The Chinese University of Hong Kong(香港中文大学)

Hou Pong Chan, Wang Chen, Irwin King

摘要:

从用户评论中获取准确的摘要和情感是现代电子商务平台的重要组成部分。评论摘要旨在生成描述评论的关键观点和情感的简明摘要,而情感分类旨在预测指示评论的情感态度的情感标签。为了有效地利用评论摘要和情感分类任务中共享的情感信息,我们提出了一种新的双视图模型,该模型联合提高了这两个任务的性能。在我们的模型中,编码器首先学习一个上下文表示的审查,然后摘要解码器生成一个审查摘要逐字逐句。之后,源视图情感分类器使用编码的上下文表示来预测评论的情感标签,而摘要视图情感分类器使用解码器隐藏状态来预测生成的摘要的情感标签。在训练过程中,我们引入了不一致损失来惩罚这两个分类器之间的不一致。它帮助解码器生成一个摘要,使其与评论具有一致的情感倾向,并帮助两个情感分类器相互学习。在四个不同领域的真实数据集上的实验结果证明了该模型的有效性。

英文摘要:

Acquiring accurate summarization and sentiment from user reviews is an essential component of modern e-commerce platforms. Review summarization aims at generating a concise summary that describes the key opinions and sentiment of a review, while sentiment classification aims to predict a sentiment label indicating the sentiment attitude of a review. To effectively leverage the shared sentiment information in both review summarization and sentiment classification tasks, we propose a novel dual-view model that jointly improves the performance of these two tasks. In our model, an encoder first learns a context representation for the review, then a summary decoder generates a review summary word by word. After that, a source-view sentiment classifier uses the encoded context representation to predict a sentiment label for the review, while a summary-view sentiment classifier uses the decoder hidden states to predict a sentiment label for the generated summary. During training, we introduce an inconsistency loss to penalize the disagreement between these two classifiers. It helps the decoder to generate a summary to have a consistent sentiment tendency with the review and also helps the two sentiment classifiers learn from each other. Experiment results on four real-world datasets from different domains demonstrate the effectiveness of our model.

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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