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arXiv cs/9907017cs.CL
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一种自动生成词汇迁移规则的Bootstrap方法

A Bootstrap Approach to Automatically Generating Lexical Transfer Rules

Davide Turcato, Paul McFetridge, Fred Popowich, Janine Toole

摘要:

我们描述了一种方法,自动生成词汇迁移规则(LTRs)从词的等价使用的转移规则模板。模板是骨架LTR,未指定单词。新的LTR是通过用单词实例化模板来创建的,前提是这些单词属于模板所需的适当词汇类别。我们定义了两种方法来创建模板清单并使用它们生成新的LTR。一种更简单的方法是从手工编码的LTR样本中提取一组有限的模板,并直接在生成过程中使用它们。另一种方法包括在初始有限模板集上进行抽象以定义更高级别的模板,其中双语等价物根据涉及短语类别的对应关系来定义。短语模板,然后映射到词汇模板集的语法的帮助。通过这种方式,递归地定义了一组无限的词汇模板。新的LTR是通过解析输入单词,在短语级别匹配模板,并使用相应的词汇类别来实例化词汇模板来创建的。无限模板集的定义使得能够自动创建用于任何基数的多词、非组合词等价物的LTR。

英文摘要:

We describe a method for automatically generating Lexical Transfer Rules (LTRs) from word equivalences using transfer rule templates. Templates are skeletal LTRs, unspecified for words. New LTRs are created by instantiating a template with words, provided that the words belong to the appropriate lexical categories required by the template. We define two methods for creating an inventory of templates and using them to generate new LTRs. A simpler method consists of extracting a finite set of templates from a sample of hand coded LTRs and directly using them in the generation process. A further method consists of abstracting over the initial finite set of templates to define higher level templates, where bilingual equivalences are defined in terms of correspondences involving phrasal categories. Phrasal templates are then mapped onto sets of lexical templates with the aid of grammars. In this way an infinite set of lexical templates is recursively defined. New LTRs are created by parsing input words, matching a template at the phrasal level and using the corresponding lexical categories to instantiate the lexical template. The definition of an infinite set of templates enables the automatic creation of LTRs for multi-word, non-compositional word equivalences of any cardinality.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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