Conference article

Ensembles of Neural Morphological Inflection Models

Ilmari Kylliäinen
Department of Digital Humanities, University of Helsinki, Finland

Miikka Silfverberg
Department of Digital Humanities, University of Helsinki, Finland

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Published in: Proceedings of the 22nd Nordic Conference on Computational Linguistics (NoDaLiDa), September 30 - October 2, Turku, Finland

Linköping Electronic Conference Proceedings 167:32, p. 304--309

NEALT Proceedings Series 42:32, p. 304--309

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Published: 2019-10-02

ISBN: 978-91-7929-995-8

ISSN: 1650-3686 (print), 1650-3740 (online)

Abstract

We investigate different ensemble learning techniques for neural morphological inflection using bidirectional LSTM encoder-decoder models with attention. We experiment with weighted and unweighted majority voting and bagging. We find that all investigated ensemble methods lead to improved accuracy over a baseline of a single model. However, contrary to expectation based on earlier work by \newcite{Najafi2018} and \newcite{Silfverberg2017}, weighting does not deliver clear benefits. Bagging was found to underperform plain voting ensembles in general.

Keywords

morphological inflection computational morphology ensemble learning deep learning recurrent neural networks

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