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arXiv 1909.04054cs.CL
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基于预训练语言模型的序列句子分类

Pretrained Language Models for Sequential Sentence Classification

Allen Institute for Artificial Intelligence(艾伦人工智能研究所);Allen School of Computer Science & Engineering, University of Washington(华盛顿大学艾伦计算机科学与工程学院)

Arman Cohan, Iz Beltagy, Daniel King, Bhavana Dalvi, Daniel S. Weld

摘要:

作为更好的文档级理解的一步,我们探讨了一个序列的句子到其相应的类别,一个任务,需要理解句子的上下文中的文件的分类。最近成功的模型,这个任务使用分层模型的上下文语句表示,和条件随机场(CRF),以纳入后续标签之间的依赖关系。在这项工作中,我们表明,预训练的语言模型,BERT(Devlin等人,2018),特别是可以用于此任务,以捕获上下文依赖性,而无需分层编码或CRF。具体来说,我们构建了一个联合句子表示,允许BERT Transformer层直接利用所有句子中所有单词的上下文信息。我们的方法在四个数据集上实现了最先进的结果,包括一个新的结构化科学摘要数据集。

英文摘要:

As a step toward better document-level understanding, we explore classification of a sequence of sentences into their corresponding categories, a task that requires understanding sentences in context of the document. Recent successful models for this task have used hierarchical models to contextualize sentence representations, and Conditional Random Fields (CRFs) to incorporate dependencies between subsequent labels. In this work, we show that pretrained language models, BERT (Devlin et al., 2018) in particular, can be used for this task to capture contextual dependencies without the need for hierarchical encoding nor a CRF. Specifically, we construct a joint sentence representation that allows BERT Transformer layers to directly utilize contextual information from all words in all sentences. Our approach achieves state-of-the-art results on four datasets, including a new dataset of structured scientific abstracts.

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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