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Chenchen Ding - 2015 - NICT at WAT 2015
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Association for Computational Linguistics
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Chenchen Ding - 2015 - NICT at WAT 2015
1.
Multilingual Translation Laboratory National
Institute of Information and Communications Technology {chenchen.ding, mutiyama, eiichiro.sumita}@nict.go.jp NICT at WAT 2015 Chenchen Ding, Masao Utiyama, Sumita Eiichiro Even simple approaches work, as long as the properties of source and target languages considered ? REV-REO for JE SMT may be taken as a new baseline because of its simplicity (and generality) ? Character-based KJ translation seems enough for SMT, while specific post-processing needed Conclusion JE trans. BLEU RIBES HUM. org. base. 18.45 .6451 - our base. 18.09 .6397 - REV-REO 18.96 .6845 +16.50 DEP-REO 18.98 .6599 +16.00 KJ trans. BLEU RIBES HUM. org. base. 69.73 .9408 - our base. 70.92 .9427 +18.25 +post-proc. 71.11 .9429 +10.50 Japanese-to-English (JE) SMT Two pre-reordering approaches ? REV-REO (morpheme-level) ? DEP-REO (chunk- / morpheme-level) また 提案 psrf は 変調 型 psrf より構造 が 簡単 で ある また は 提案 psrf より 変調 型 psrfが 構造 で ある 簡単 また 提案 psrf は 変調 型 psrf より 構造 が 簡単 で ある morpheme-level reordering chunk-level reordering また 提案 psrf は 変調 型 psrf より 構造 が 簡単 で ある ある で 簡単 が 構造 より psrf 型 変調は psrf 提案 また reverse reversetopic marker REV-REO: J. Katz-Brown and M. Collins. 2008. Syntactic reordering in preprocessing for Japanese → English translation: MIT system description for NTCIR-7 patent translation task. DEP-REO: C. Ding, K. Sakanushi, H. Touji, and M. Yamamoto. 2015. Inter-, Intra-, and Extra-chunk Pre-reordering for Statistical Japanese-to-English MT (丁, 酒主, 通事, 山本. 2014. 統計的日英翻訳における依存構造に基づく事前並べ替えルール) Korean-to-Japanese (KJ) SMT Purely character-based ? Unicode characters taken as basic units ? Nothing else ?? ?? ( 5 0 ) ?? ???? ?? ?? ??? ???? ?? 製造 装置 ( 5 0 ) ?? 図示?? ?? 冷却 機構? 設置?? ?? 製 造 装 置 5 0 に は 、 図 示 し な い 冷 却 機 構 も 設 け ら れ て い て JE translation ? MeCab ? Cabocha ? mkn 5-gram KJ translation ? max-ph-len=9 ? mkn 9-gram Evaluation SMT: LM: Moses PB SRILM
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