arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2010.03124cs.CLcs.LG
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VCDM:利用变分双向编码和深度上下文化词表示改进定义建模

VCDM: Leveraging Variational Bi-encoding and Deep Contextualized Word Representations for Improved Definition Modeling

Graduate School of Engineering(工程研究生院);The University of Tokyo(东京大学)

Machel Reid, Edison Marrese-Taylor, Yutaka Matsuo

摘要:

在本文中,我们解决了定义建模的任务,其目标是学习生成单词和短语的定义。现有的方法,这一任务是歧视性的,结合分布和词汇语义在一个隐含的,而不是直接的方式。为了解决这个问题,我们提出了一个生成模型的任务,引入了一个连续的潜在变量,明确建模上下文中使用的短语和它的定义之间的潜在关系。我们依靠变分推理进行估计,并利用上下文化的词嵌入来提高性能。我们的方法是评估现有的四个具有挑战性的基准,增加了两个新的数据集,“剑桥”和第一个非英语语料库“罗伯特”,我们发布,以补充我们的实证研究。我们的变分上下文定义建模器(VCDM)在自动和人工评估指标方面实现了最先进的性能,证明了我们方法的有效性。

英文摘要:

In this paper, we tackle the task of definition modeling, where the goal is to learn to generate definitions of words and phrases. Existing approaches for this task are discriminative, combining distributional and lexical semantics in an implicit rather than direct way. To tackle this issue we propose a generative model for the task, introducing a continuous latent variable to explicitly model the underlying relationship between a phrase used within a context and its definition. We rely on variational inference for estimation and leverage contextualized word embeddings for improved performance. Our approach is evaluated on four existing challenging benchmarks with the addition of two new datasets, "Cambridge" and the first non-English corpus "Robert", which we release to complement our empirical study. Our Variational Contextual Definition Modeler (VCDM) achieves state-of-the-art performance in terms of automatic and human evaluation metrics, demonstrating the effectiveness of our approach.

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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