Enhancing Chinese Word Segmentation Using Unlabeled Data

Weiwei Sun, Jia Xu

In: Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing. Conference on Empirical Methods in Natural Language Processing (EMNLP-2011) July 27-31 Edinburgh Scotland United Kingdom Seiten 970-979 ACL 7/2011.


This paper investigates improving supervised word segmentation accuracy with unlabeled data. Both large-scale in-domain data and small-scale document text are considered. We present a unified solution to include features derived from unlabeled data to a discriminative learning model. For the large-scale data, we derive string statistics from Gigaword to assist a character-based segmenter. In addition, we introduce the idea about transductive, document-level segmentation, which is designed to improve the system recall for out-ofvocabulary (OOV) words which appear more than once inside a document. Novel features1 result in relative error reductions of 13.8% and 15.4% in terms of F-score and the recall of OOV words respectively.


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Deutsches Forschungszentrum für Künstliche Intelligenz
German Research Center for Artificial Intelligence