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Acquisition of Tree-To-String Alignment Based on Phrase-Syntax Structure

Author: DuanLian
Tutor: ZhongYiXin
School: Beijing University of Posts and Telecommunications
Course: Information and signal processing
Keywords: Machine translation Translation Templates Phrase syntactic structure The tree string Chinese-English alignment
CLC: TP391.2
Type: Master's thesis
Year: 2010
Downloads: 29
Quote: 0
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Abstract


Translation template is a machine translation system , an important source of knowledge , and the quality and scale of a direct impact on the performance of the machine translation system , and how high-quality , high- efficiency automatic acquisition of translation templates from the corpus has become a hot topic of current research . Firstly is proposed based on the syntactic structure of the tree, a bunch of alignment template (tree-to-string alignment template, TAT). The template describes the alignment between the source language syntax tree and the target language string . Introduction of syntactic structures and a large number of structural markup and variables in the template , the syntax - based model is able to handle non-contiguous phrases , and generalization ability . The template can be applied depending on the decoder to statistics based on syntactic and instance-based and rule-based machine translation system . On this basis , this paper proposes a method of access to the templates automatically from bilingual corpus and single statement law without marked Treebank . The method is a semi- supervised , data-driven method . The two aspects of the comprehensive utilization of the method to extract the translation template . On the one hand is based on the word alignment results , syntactic tree preorder traversal extract candidate templates triples Information , including the source language syntax subtree corresponding target language string alignment information ; On the other hand , from the source , language single statement law Treebank corpus the preorder traversal extraction by the tree structure of a tuple . The experimental results show that this method can be quite satisfactory template extraction performance .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Translator
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