tailieunhanh - Báo cáo khoa học: "a bilingual dictionary generating tool"

In this paper we introduce a bilingual dictionary generating tool that does not use any large bilingual corpora. With this tool we implement our novel pivot based bilingual dictionary generation method that uses mainly the WordNet of the pivot language to build a new bilingual dictionary. We propose the usage of WordNet for good accuracy, introducing also a double directional selection method with local thresholds to maximize recall. | iChi a bilingual dictionary generating tool Varga István Yamagata University Graduate School of Science and Engineering dyn36150@ Yokoyama Shoichi Yamagata University Graduate School of Science and Engineering yokoyama@ Abstract In this paper we introduce a bilingual dictionary generating tool that does not use any large bilingual corpora. With this tool we implement our novel pivot based bilingual dictionary generation method that uses mainly the WordNet of the pivot language to build a new bilingual dictionary. We propose the usage of WordNet for good accuracy introducing also a double directional selection method with local thresholds to maximize recall. 1 Introduction Bilingual dictionaries are an essential perhaps even indispensable tool not only as resources for machine translation but also in every day activities or language education. While such dictionaries are available to and from numerous widely used languages less represented language pairs have rarely a reliable dictionary with good coverage. The need for bilingual dictionaries for these less common language pairs is increasing but qualified human resources are scarce. Considering that in these conditions manual compilation is highly costly alternative methods are imperative. Pivot language based bilingual dictionary generation is one plausible such alternative Tanaka and Umemura 1994 Sjobergh 2005 Shirai and Yamamoto 2001 Bond and Ogura 2007 . These methods do not use large bilingual corpora thus being suitable for low-resourced languages. Our paper presents iChi the implementation of our own method an easy-to-use customizable tool that generates a bilingual dictionary. The paper is structured as follows first we briefly describe the methodological background of our tool after which we describe its basic functions concluding with discussions. Thorough description and evaluation including comparative analysis are available in Varga and Yo-koyama 2009 . 2 .

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