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Learning dependency translation models as collections of finite-state head transducers

Published: 01 March 2000 Publication History

Abstract

The paper defines weighted head transducers, finite-state machines that perform middle-out string transduction. These transducers are strictly more expressive than the special case of standard left-to-right finite-state transducers. Dependency transduction models are then defined as collections of weighted head transducers that are applied hierarchically. A dynamic programming search algorithm is described for finding the optimal transduction of an input string with respect to a dependency transduction model. A method for automatically training a dependency transduction model from a set of input-output example strings is presented. The method first searches for hierarchical alignments of the training examples guided by correlation statistics, and then constructs the transitions of head transducers that are consistent with these alignments. Experimental results are given for applying the training method to translation from English to Spanish and Japanese.

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Published In

cover image Computational Linguistics
Computational Linguistics  Volume 26, Issue 1
Special issue on finite-state methods in NLP
March 2000
105 pages
ISSN:0891-2017
EISSN:1530-9312
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Publisher

MIT Press

Cambridge, MA, United States

Publication History

Published: 01 March 2000
Published in COLI Volume 26, Issue 1

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  • (2012)An intelligent Web agent that autonomously learns how to translateWeb Intelligence and Agent Systems10.5555/2589968.258997110:2(165-178)Online publication date: 1-Apr-2012
  • (2012)Three dependency-and-boundary models for grammar inductionProceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning10.5555/2390948.2391024(688-698)Online publication date: 12-Jul-2012
  • (2011)Survey: Weighted Extended Top-down Tree Transducers Part II—Application in Machine TranslationFundamenta Informaticae10.5555/2362176.2362184112:2-3(239-261)Online publication date: 1-Apr-2011
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