A hybrid approach to chinese abbreviation expansion

Authors:
Guohong Fu;Kang-Kuong Luke;Min Zhang;GuoDong Zhou
Affiliations:
Dept of Chinese, Translation and Linguistics, City University of Hong Kong, Hong Kong;Department of Linguistics, The University of Hong Kong, Hong Kong;Institute for Infocomm Research, Singapore;Institute for Infocomm Research, Singapore
Venue:
ICCPOL'06 Proceedings of the 21st international conference on Computer Processing of Oriental Languages: beyond the orient: the research challenges ahead
Year:
2006

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Abstract

This paper presents a hybrid approach to Chinese abbreviation expansion. In this study, each short-form in Chinese text is assumed to be created by the method of reduction and the method of elimination or generalization, respectively. A mapping table between short words and long words and a dictionary of non-reduced short-form/full-form pairs are thus applied to generate the respective expansion candidates. Then, a hidden Markov model (HMM) based disambiguation is employed to rank these candidates and select a proper expansion for each ambiguous abbreviation. In order to improve expansion accuracy, some linguistic knowledge like discourse information and abbreviation patterns are further employed to double-check the expanded results and revise some error expansions if any. The proposed approach was evaluated on an abbreviation-expanded corpus built from the Peking University Corpus. The results showed that a recall of 83.8% and a precision of 86.3% can be achieved on average for different types of Chinese abbreviations.