RM-structure alignment based statistical machine translation model  

作　　者：孙加东 Zhao Tiejun 

机构地区：[1]MOE-MS Key Laboratory of Natural Language Processing and Speech, Harbin Institute of Technology, Harbin 150001, P.R. China

出　　处：《High Technology Letters》2008年第3期271-275,共5页高技术通讯（英文版）

基　　金：the National High Technology Research and Development Progran of China(No.200606010108.2006AA01Z150)

摘　　要：A novel model based on structure alignments is proposed for statistical machine translation in this paper. Meta-structure and sequence of meta-structure for a parse tree are defined. During the translation process, a parse tree is decomposed to deal with the structure divergence and the alignments can be constructed at different levels of recombination of meta-structure （RM）. This method can perform the structure mapping across the sub-tree structure between languages. As a result, we get not only the translation for the target language, but sequence of meta-stmctu .re of its parse tree at the same time. Experiments show that the model in the framework of log-linear model has better generative ability and significantly outperforms Pharaoh, a phrase-based system.A novel model based on structure alignments is proposed for statistical machine translation in thispaper.Meta-stnlcture and sequence of meta-structure for a parse tree are defined.During the translationprocess,a parse tree is decomposed to deal with the structure divergence and the alignments can be con-stmcted at different levels of recombination of meta-structure(RM).This method can perform the struc-ture mapping across the sub-tree structure between languages.As a result,we get not only the translationfor the target language,but sequence of meta-structure of its parse tree at the same time.Experimentsshow that the model in the framework of log-linear model has better generative ability and significantlyoutperforms Pharaoh,a phrase-based system.

关 键 词：statistical machine translation recombination of meta-structure （ RM） structure alignment log-linear model 

分 类 号：TP391.2[自动化与计算机技术—计算机应用技术]