Papers › Embedding Strategies for Specialized Domains: Application to Clinical Entity Recognition

Embedding Strategies for Specialized Domains: Application to Clinical Entity Recognition

1 Jul 2019ACL 2019 7archive 2025-07-28

Hicham El Boukkouri, Olivier Ferret, Thomas Lavergne, Pierre Zweigenbaum

Using pre-trained word embeddings in conjunction with Deep Learning models has become the {``}de facto{''} approach in Natural Language Processing (NLP). While this usually yields satisfactory results, off-the-shelf word embeddings tend to perform poorly on texts from specialized domains such as clinical reports. Moreover, training specialized word representations from scratch is often either impossible or ineffective due to the lack of large enough in-domain data. In this work, we focus on the clinical domain for which we study embedding strategies that rely on general-domain resources only. We show that by combining off-the-shelf contextual embeddings (ELMo) with static word2vec embeddings trained on a small in-domain corpus built from the task data, we manage to reach and sometimes outperform representations learned from a large corpus in the medical domain.

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