基于锚点词对的双语词对齐算法

双语词对齐是指在源、译文中找到词汇级的对译关系，是自然语言处理领域一个非常有用而又比较困难的研究课题．其中涉及词法、语法、语义以及英汉语言问的固有差异和翻译习惯等诸多问题．文章在词法分析的基础上，利用有限的语言资源（主要只使用了一部双语词典），采取多级匹配和消歧策略，将词对齐问题转化为迭代求解锚点词对的过程，使得词对齐既有较高的准确率又有较高的召回率．经过对真实语料的测试，词对齐准确率达93．0％，召回率迭77．3％．F值达84．2％．基本上满足了有关应用的实际要采．

Word-Alignment Algorithm Based on Anchor Word-Pair

Word-alignment algorithm is to find the corresponding translation of words between the source language sentence and the target language sentence. It is a very useful and difficult task which involves in many problems such as accordance,syntax,sementics and inherent difference between and English and Chinese,and human's translation habits,etc.In this paper,a new algorithm is proposed based on accidence analysis: the word-alignment problem is transformed to an iterative solution of anchor word-pair by multi-level match and disambiguity algorithm which only use a bilingual dictionary.The experiment results show that the word-alignment precision is 93.0%,recall is 77.3%and F-score is 84.2%.