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A Method of Chinese and Thai Cross-Lingual Query Expansion Based on Comparable Corpus

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Cross-lingual query expansion is usually based on the relationship among monolingual words. Bilingualcomparable corpus contains relationships among bilingual words. Therefore, this paper proposes a methodbased on these relationships to conduct query expansion. First, the word vectors which characterize thebilingual words are trained using Chinese and Thai bilingual comparable corpus. Then, the correlationbetween Chinese query words and Thai words are computed based on these word vectors, followed withselecting the Thai candidate expansion terms via the correlative value. Then, multi-group Thai queryexpansion sentences are built by the Thai candidate expansion words based on Chinese query sentence. Finally, we can get the optimal sentence using the Chinese and Thai query expansion method, and performthe Thai query expansion. Experiment results show that the cross-lingual query expansion method weproposed can effectively improve the accuracy of Chinese and Thai cross-language information retrieval.

Abstract

Cross-lingual query expansion is usually based on the relationship among monolingual words. Bilingualcomparable corpus contains relationships among bilingual words. Therefore, this paper proposes a methodbased on these relationships to conduct query expansion. First, the word vectors which characterize thebilingual words are trained using Chinese and Thai bilingual comparable corpus. Then, the correlationbetween Chinese query words and Thai words are computed based on these word vectors, followed withselecting the Thai candidate expansion terms via the correlative value. Then, multi-group Thai queryexpansion sentences are built by the Thai candidate expansion words based on Chinese query sentence. Finally, we can get the optimal sentence using the Chinese and Thai query expansion method, and performthe Thai query expansion. Experiment results show that the cross-lingual query expansion method weproposed can effectively improve the accuracy of Chinese and Thai cross-language information retrieval.

참고문헌 (32)

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