Discriminative Word Alignment by Linear Modeling

	Discriminative Word Alignment by Linear Modeling
	Liu, Yang; Liu, Qun; Lin, Shouxun
	2010-09-01
发表期刊	COMPUTATIONAL LINGUISTICS
ISSN	0891-2017
卷号	36 期号:3 页码:303-339
摘要	Word alignment plays an important role in many NLP tasks as it indicates the correspondence between words in a parallel text. Although widely used to align large bilingual corpora, generative models are hard to extend to incorporate arbitrary useful linguistic information. This article presents a discriminative framework for word alignment based on a linear model. Within this framework, all knowledge sources are treated as feature functions, which depend on a source language sentence, a target language sentence, and the alignment between them. We describe a number of features that could produce symmetric alignments. Our model is easy to extend and can be optimized with respect to evaluation metrics directly. The model achieves state-of-the-art alignment quality on three word alignment shared tasks for five language pairs with varying divergence and richness of resources. We further show that our approach improves translation performance for various statistical machine translation systems.
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[60603095] ; National Natural Science Foundation of China[60573188]
WOS研究方向	Computer Science ; Linguistics
WOS类目	Computer Science, Artificial Intelligence ; Computer Science, Interdisciplinary Applications ; Linguistics ; Language & Linguistics
WOS记录号	WOS:000281744900002
出版者	M I T PRESS
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/12329
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Liu, Yang
作者单位	Chinese Acad Sci, Inst Comp Technol, Key Lab Intelligent Informat Proc, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yang,Liu, Qun,Lin, Shouxun. Discriminative Word Alignment by Linear Modeling[J]. COMPUTATIONAL LINGUISTICS,2010,36(3):303-339.
APA	Liu, Yang,Liu, Qun,&Lin, Shouxun.(2010).Discriminative Word Alignment by Linear Modeling.COMPUTATIONAL LINGUISTICS,36(3),303-339.
MLA	Liu, Yang,et al."Discriminative Word Alignment by Linear Modeling".COMPUTATIONAL LINGUISTICS 36.3(2010):303-339.