Shoichi Yokoyama

Also published as: S. Yokoyama


2013

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Proceedings of the 5th Workshop on Patent Translation
Shoichi Yokoyama
Proceedings of the 5th Workshop on Patent Translation

2011

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Investigation for Translation Disambiguation of Verbs in Patent Sentences using Word Grouping
Shoichi Yokoyama | Yuichi Takano
Proceedings of the 4th Workshop on Patent Translation

2009

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Transfer rule generation for a Japanese-Hungarian machine translation system
István Varga | Shoichi Yokoyama
Proceedings of Machine Translation Summit XII: Posters

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Translation Disambiguation of Patent Sentences using Case Frames
Shoichi Yokoyama | Masumi Okuyama
Proceedings of the Third Workshop on Patent Translation

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iChi: a bilingual dictionary generating tool
István Varga | Shoichi Yokoyama
Proceedings of the ACL-IJCNLP 2009 Conference Short Papers

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Bilingual dictionary generation for low-resourced language pairs
István Varga | Shoichi Yokoyama
Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing

2007

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Japanese-Hungarian dictionary generation using ontology resources
István Varga | Shoichi Yokoyama
Proceedings of Machine Translation Summit XI: Papers

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Proceedings of the Workshop on Patent translation
Jun’ichi Tsujii | Shoichi Yokoyama
Proceedings of the Workshop on Patent translation

2005

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Classification of Modified Relationships in Japanese Patent Sentences
Shoichi Yokoyama | Yuya Kaneda
Workshop on patent translation

It is well known that sentences in Japanese patents have long and complicated structures, especially necessary conditions and details. Here, patent sentences are analyzed and classified by pattern of modified relationships. Morphemes were first extracted using the famous morpheme analysis tool Chasen, and then the modified relations were extracted using the software Cabocha. Many modification mistakes were caused by long complicated structures, which required correction by humans. In the process of correction, the modification structure patterns were classified using about 200 sentences. This clarified the characteristics of Japanese patent sentences, and it is useful in machine translation of patent sentences.

2001

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An automatic evaluation method for machine translation using two-way MT
Shoichi Yokoyama | Hideki Kashioka | Akira Kumano | Masaki Matsudaira | Yoshiko Shirokizawa | Shuji Kodama | Terumasa Ehara | Shinichiro Miyazawa | Yuzo Murata
Proceedings of Machine Translation Summit VIII

Evaluation of machine translation is one of the most important issues in this field. We have already proposed a quantitative evaluation of machine translation system. The method was roughly that an example sentence in Japanese is machine translated into English, and then into Japanese using several systems, and that the comparison of output Japanese sentences with the original Japanese sentence is done for the word identification, the correctness of the modification, the syntactic dependency, and the parataxis. By calculating the score, we could quantitatively evaluate the English machine translation. However, the extraction of word identification etc. was done by human, and the fact affects the correctness of evaluation. In order to solve this problem, we developed an automatic evaluation system. We report the detail of the system in this paper..

1999

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Study on evaluation of WWW MT systems
Shinichiro Miyazawa | Shoichi Yokoyama | Masaki Matsudaira | Akira Kumano | Shuji Kodama | Hideki Kashioka | Yoshiko Shirokizawa | Yasuo Nakajima
Proceedings of Machine Translation Summit VII

Compared with off-line machine translation (MT). MT for the WWW has more evaluation factors such as translation accuracy of text, interpretation of HTML tags, consistency with various protocols and browsers, and translation speed for net surfing. Moreover, the speed of technical innovation and its practical application is fast, including the appearance of new protocols. Improvement of MT software for the WWW will enable the sharing of information from around the world and make a great deal of contribution to mankind. Despite the importance of general evaluation studies on MT software for the WWW. it appears that such studies have not yet been conducted. Since MT for the WWW will be a critical factor for future international communication, its study and evaluation is an important theme. This study aims at standardized evaluation of MT for the WWW. and suggests an evaluation method focusing on unique aspects of the WWW independent of text. This evaluation method has a wide range of aptitude without depending on specific languages. Twenty-four items specific to the WWW were actually evaluated with regard to six MT software for the WWW. This study clarified various issues which should be improved in the future regarding MT software for the WWW and issues on evaluation technology of MT on the Internet.

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Quantitative evaluation of machine translation using two-way MT
Shoichi Yokoyama | Akira Kumano | Masaki Matsudaira | Yoshiko Shirokizawa | Mutsumi Kawagoe | Shuji Kodama | Hideki Kashioka | Terumasa Ehara | Shinichiro Miyazawa | Yasuo Nakajima
Proceedings of Machine Translation Summit VII

One of the most important issues in the field of machine translation is evaluation of the translated sentences. This paper proposes a quantitative method of evaluation for machine translation systems. The method is as follows. First, an example sentence in Japanese is machine translated into English using several Japanese-English machine translation systems. Second, the output English sentences are machine translated into Japanese using several English-Japanese machine translation systems (different from the Japanese-English machine translation systems). Then, each output Japanese sentence is compared with the original Japanese sentence in terms of word identification, correctness of the modification, syntactic dependency, and parataxes. An average score is calculated, and this becomes the total evaluation of the machine translation of the sentence. From this two-way machine translation and the calculation of the score, we can quantitatively evaluate the English machine translation. For the present study, we selected 100 Japanese sentences from the abstracts of scientific articles. Each of these sentences has an English translation which was performed by a human. Approximately half of these sentences are evaluated and the results are given. In addition, a comparison of human and machine translations is also performed and the trade-off between the two methods of translation is discussed.

1993

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Evaluation Method of Machine Translation: from the Viewpoint of Natural Language Processing
Shoichi Yokoyama
Proceedings of Machine Translation Summit IV

1986

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Conceptual Lexicon Using an Object-Oriented Language
Shoichi Yokoyama | Kenji Hanakata
Coling 1986 Volume 1: The 11th International Conference on Computational Linguistics

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Semantic based generation of Japanese German translation system - Result and Evaluation-
K. Hanakata | A. Lesniewski | S. Yokoyama
Coling 1986 Volume 1: The 11th International Conference on Computational Linguistics