arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.12671cs.CLcs.AI
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LET:基于语言知识的中文短文本匹配图Transformer

LET: Linguistic Knowledge Enhanced Graph Transformer for Chinese Short Text Matching

State Key Laboratory of Media Convergence Production Technology and Systems(媒体融合生产技术与系统国家重点实验室);MoE Key Lab of Artificial Intelligence, AI Institute, Shanghai Jiao Tong University(上海交通大学人工智能研究院教育部人工智能重点实验室)

Boer Lyu, Lu Chen, Su Zhu, Kai Yu

摘要:

中文短文本匹配是自然语言处理中的一项基本任务。现有的方法通常采用汉字或词作为输入标记。它们有两个局限性:1)有些汉语词是多义词,语义信息没有得到充分利用。2)某些模型会遇到由分词引起的潜在问题。在这里,我们引入知网作为外部知识库,并提出了一个语言知识增强图Transformer(LET)来处理单词歧义。此外,我们采用词格图作为输入,以维护多粒度的信息。我们的模型也是对预训练的语言模型的补充。在两个中文数据集上的实验结果表明,我们的模型优于各种典型的文本匹配方法。消融研究还表明,语义信息和多粒度信息是文本匹配建模的重要。

英文摘要:

Chinese short text matching is a fundamental task in natural language processing. Existing approaches usually take Chinese characters or words as input tokens. They have two limitations: 1) Some Chinese words are polysemous, and semantic information is not fully utilized. 2) Some models suffer potential issues caused by word segmentation. Here we introduce HowNet as an external knowledge base and propose a Linguistic knowledge Enhanced graph Transformer (LET) to deal with word ambiguity. Additionally, we adopt the word lattice graph as input to maintain multi-granularity information. Our model is also complementary to pre-trained language models. Experimental results on two Chinese datasets show that our models outperform various typical text matching approaches. Ablation study also indicates that both semantic information and multi-granularity information are important for text matching modeling.

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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