基于介词用法的事件信息抽取研究

摘要

Event extraction is an important research point in the area of information extraction,in order to improve the efficiency of the event information extraction,an approach based on preposition's usages is proposed for event information extraction.By study the effects of different preposition's usages on language structure,preposition's usages are taken as the background,the extraction rules are finished.According to the rules,the coding of extraction system is completed,in order to achieve the better extraction result.The experiment corpus is provided by Zhengzhou university,the approach achieves a better performance,the precision rate,recall rate and F measure reaches 90.88％,86.92％,88.86 ％ respectively.%事件信息抽取是目前信息抽取领域的主要研究方向,为了提高事件信息抽取的准确率,提出一种基于介词用法的事件信息抽取方法.通过对介词用法的研究,掌握了不同介词用法在语言结构中的不同作用,以介词用法信息为背景,完成抽取规则编写.针对规则,完成抽取系统的编写,以达到理想的抽取结果.采用郑州大学提供的语料,通过大量实验,结果准确率、召回率及F值分别达到90.88％、86.92％、88.86％,表明了该方法的有效性.