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Báo cáo khoa học: "Expanding Indonesian-Japanese Small Translation Dictionary Using a Pivot Language"

We propose a novel method to expand a small existing translation dictionary to a large translation dictionary using a pivot language. Our method depends on the assumption that it is possible to find a pivot language for a given language pair on condition that there are both a large translation dictionary from the source language to the pivot language, and a large translation dictionary from the pivot language to the destination language. Experiments that expands the Indonesian-Japanese dictionary using the English language as a pivot language shows that the proposed method can improve performance of a real CLIR system | Expanding Indonesian-Japanese Small Translation Dictionary Using a Pivot Language Masatoshi Tsuchiya Ayu Purwarianti Toshiyuki Wakita Seiichi Nakagawa Information and Media Center Department of Information and Computer Sciences Toyohashi University of Technology tsuchiya@imc.tut.ac.jp wakita ayu nakagawa @slp.ics.tut.ac.jp Abstract We propose a novel method to expand a small existing translation dictionary to a large translation dictionary using a pivot language. Our method depends on the assumption that it is possible to find a pivot language for a given language pair on condition that there are both a large translation dictionary from the source language to the pivot language and a large translation dictionary from the pivot language to the destination language. Experiments that expands the Indonesian-Japanese dictionary using the English language as a pivot language shows that the proposed method can improve performance of a real CLIR system. 1 Introduction Rich cross lingual resources including large translation dictionaries are necessary in order to realize working cross-lingual NLP applications. However it is infeasible to build such resources for all language pairs because there are many languages in the world. Actually while rich resources are available for several popular language pairs like the English language and the Japanese language poor resources are only available for rest unfamiliar language pairs. In order to resolve this situation automatic construction of translation dictionary is effective but it is quite difficult as widely known. We therefore concentrate on the task of expanding a small existing translation dictionary instead of it. Let us consider three dictionaries a small seed dictionary which consists of headwords in the source language and their translations in the destination language a large source-pivot dictionary which consists of headwords in the source language and their translations in the 197 pivot language and a large .