Topical Phrase Extraction from Clinical Reports by Incorporating both Local and Global Context

Pergola, Gabriele, He, Yulan and Lowe, David (2017). Topical Phrase Extraction from Clinical Reports by Incorporating both Local and Global Context. IN: The 2nd AAAI Workshop on Health Intelligence. UNSPECIFIED.

Abstract

Making sense of words often requires to simultaneously examine the surrounding context of a term as well as the global themes characterizing the overall corpus. Several topic models have already exploited word embeddings to recognize local context, however, it has been weakly combined with the global context during the topic inference. This paper proposes to extract topical phrases corroborating the word embedding information with the global context detected by Latent Semantic Analysis, and then combine them by means of the Polya urn ´ model. To highlight the effectiveness of this combined approach the model was assessed analyzing clinical reports, a challenging scenario characterized by technical jargon and a limited word statistics available. Results show it outperforms the state-of-the-art approaches in terms of both topic coherence and computational cost.

Divisions: Engineering & Applied Sciences > Computer science
Engineering & Applied Sciences > Systems analytics research institute (SARI)
Engineering & Applied Sciences > Computer science research group
Engineering & Applied Sciences > Mathematics
Additional Information: Copyright © 2018, Association for the Advancement of Artificial Intelligence (www.aaai.org). All rights reserved.
Event Title: 2018 Workshop on Health Intelligence (W3PHIAI 2018)
Event Type: Other
Event Dates: 2018-02-02 - 2018-02-03
Full Text Link:
Related URLs: https://aaai.or ... aper/view/16612 (Publisher URL)
Published Date: 2017-11-20
Accepted Date: 2017-11-20
Published Online Date: 2018-06-20
Authors: Pergola, Gabriele
He, Yulan ( 0000-0003-3948-5845)
Lowe, David

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