arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2306.03469cs.CL
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通过结构语义匹配进行联合事件抽取

Joint Event Extraction via Structural Semantic Matching

Peking University(北京大学)

Haochen Li, Tianhao Gao, Jingkun Wang, Weiping Li

AI总结:

本文提出JSSM模型,利用STE和DSE编码事件类型语义并进行结构匹配,通过双向注意力联合完成事件检测与论元抽取,在ACE2005上显著提升性能。

摘要:

事件抽取(Event Extraction,EE)是信息抽取中的基本任务之一,旨在从文本中检测事件提及并找到相应的论元角色。EE任务可以被抽象为将事件类型的语义定义和论元结构与目标文本进行匹配的过程。本文对事件类型的语义特征进行编码,并与目标文本进行结构匹配。具体而言,提出了语义类型嵌入(Semantic Type Embedding,STE)和动态结构编码器(Dynamic Structure Encoder,DSE)模块。此外,还构建了联合结构语义匹配(Joint Structural Semantic Matching,JSSM)模型,通过双向注意力层联合执行事件检测和论元抽取任务。在ACE2005数据集上的实验结果表明,该模型取得了显著的性能提升。

英文摘要:

Event Extraction (EE) is one of the essential tasks in information extraction, which aims to detect event mentions from text and find the corresponding argument roles. The EE task can be abstracted as a process of matching the semantic definitions and argument structures of event types with the target text. This paper encodes the semantic features of event types and makes structural matching with target text. Specifically, Semantic Type Embedding (STE) and Dynamic Structure Encoder (DSE) modules are proposed. Also, the Joint Structural Semantic Matching (JSSM) model is built to jointly perform event detection and argument extraction tasks through a bidirectional attention layer. The experimental results on the ACE2005 dataset indicate that our model achieves a significant performance improvement

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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