汉语虚词用法在依存句法分析中的应用研究

Studies on the Application of Chinese Functional Words'Usages in Dependency Parsing

虚词在现代汉语中占有重要地位,虚词与词序一起构成现代汉语的句法手段,对句法分析有重要的影响。依存句法分析是自然语言处理领域研究的热点,为了提高依存关系的识别效果,该文考虑将虚词用法应用到依存关系的识别过程中。通过对虚词用法的研究,以及对依存句法分析各种依存关系识别情况的分析,发现并列关系与虚词中的连词关系密切。作者在并列关系识别过程中加入连词的用法信息,从而提高了并列关系的识别效果。实验结果表明,包含连词的并列关系的LAS及UAS分别提高了3.43%和2.29%。

Functional words play an important role in modern Chinese words,and constitute the syntactic means of Chinese with the word order,so functional words have an important influence on the syntactic analysis.Dependency parsing is a hotspot of research in the field of natural language processing.In order to improve the recognition effect of dependence relation,the usages of functional words are applied to the recognition process of dependence relation in this paper.Through the study of functional words usages,as well as the analysis of dependence relation in the dependency parsing,it found that the coordination relation has close connection with conjunction.And then,the conjunction usages are considered in the recognition process of coordination relation to improve the recognition performance.The experimental results show that,through considering the conjunction usages,the LAS and the UAS of coordination relations have increased 3.43%and 2.29%respectively.