arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.01379cs.CLcs.LG
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使用上下文单词和句子嵌入检测正在进行的事件

Detecting Ongoing Events Using Contextual Word and Sentence Embeddings

Universidad Nacional del Sur(南方国立大学);Dalhousie University(达尔豪斯大学)

Mariano Maisonnave, Fernando Delbianco, Fernando Tohmé, Ana Maguitman, Evangelos Milios

摘要:

本文介绍了正在进行的事件检测(OED)任务,这是一个特定的事件检测任务,其目标是检测正在进行的事件只提到,而不是历史,未来,假设,或其他形式或事件,既不新鲜也不当前。任何需要从非结构化文本中提取关于正在发生的事件的结构化信息的应用程序都可以利用OED系统。本文的主要贡献如下:(1)介绍了OED任务以及为该任务手动标记的数据集;(2)提出了一个用于该任务的RNN模型的设计和实现,该模型使用BERT嵌入来定义上下文单词和上下文句子嵌入作为属性,据我们所知,这在以前从未用于检测新闻中的正在进行的事件;(3)它提出了一个广泛的经验评估,包括(i)不同架构和超参数的探索,(ii)研究每个属性的影响的消融测试,以及(iii)与最先进模型的复制进行比较。结果提供了几个见解的重要性,上下文嵌入,并表明该方法是有效的,在OED的任务,优于基线模型。

英文摘要:

This paper introduces the Ongoing Event Detection (OED) task, which is a specific Event Detection task where the goal is to detect ongoing event mentions only, as opposed to historical, future, hypothetical, or other forms or events that are neither fresh nor current. Any application that needs to extract structured information about ongoing events from unstructured texts can take advantage of an OED system. The main contribution of this paper are the following: (1) it introduces the OED task along with a dataset manually labeled for the task; (2) it presents the design and implementation of an RNN model for the task that uses BERT embeddings to define contextual word and contextual sentence embeddings as attributes, which to the best of our knowledge were never used before for detecting ongoing events in news; (3) it presents an extensive empirical evaluation that includes (i) the exploration of different architectures and hyperparameters, (ii) an ablation test to study the impact of each attribute, and (iii) a comparison with a replication of a state-of-the-art model. The results offer several insights into the importance of contextual embeddings and indicate that the proposed approach is effective in the OED task, outperforming the baseline models.

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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