arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2006.04014cs.CL
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基于目标概念嵌入的医学概念规范化

Medical Concept Normalization in User Generated Texts by Learning Target Concept Embeddings

NIT Trichy(蒂鲁吉拉伯利国家理工学院)

Katikapalli Subramanyam Kalyan, S. Sangeetha

摘要:

医学概念规范化有助于在自由形式的文本中发现标准概念,即,将与健康相关的提及映射到词汇表中的标准概念。它远远超出了简单的字符串匹配,需要对概念提及有深入的语义理解。最近的研究方法的概念规范化,无论是文本分类或文本匹配。现有的文本分类方法的主要缺点是:a)在学习输入概念提及表示时忽略了有价值的目标概念信息; b)文本匹配方法需要单独生成目标概念嵌入,这是耗时和资源消耗的。我们提出的模型克服了这些缺点,共同学习的表示输入概念提及和目标概念。首先,它使用RoBERTa学习输入概念提及表示。其次,它发现输入概念提及的嵌入与所有目标概念之间的余弦相似性。在这里,目标概念的嵌入是随机初始化的,然后在训练过程中更新。最后,将余弦相似度最大的目标概念分配给输入概念提及。我们的模型通过将准确率提高到2.31%,超过了三个标准数据集上的所有现有方法。

英文摘要:

Medical concept normalization helps in discovering standard concepts in free-form text i.e., maps health-related mentions to standard concepts in a vocabulary. It is much beyond simple string matching and requires a deep semantic understanding of concept mentions. Recent research approach concept normalization as either text classification or text matching. The main drawback in existing a) text classification approaches is ignoring valuable target concepts information in learning input concept mention representation b) text matching approach is the need to separately generate target concept embeddings which is time and resource consuming. Our proposed model overcomes these drawbacks by jointly learning the representations of input concept mention and target concepts. First, it learns the input concept mention representation using RoBERTa. Second, it finds cosine similarity between embeddings of input concept mention and all the target concepts. Here, embeddings of target concepts are randomly initialized and then updated during training. Finally, the target concept with maximum cosine similarity is assigned to the input concept mention. Our model surpasses all the existing methods across three standard datasets by improving accuracy up to 2.31%.

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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