Study of Extension of Constraint-based Grammars Incorporating the Concept of Continuous Quantity

本研究试图为设计全面系统地描述日语的语法框架奠定基础，并建立一个基于约束的语法形式主义的坚实的日语语法体系，其中不存在转换等衍生概念。我们取得了以下成果：从语料库中自动提取词汇项。对于电子语料库，例如CD-ROM上的《每日新闻》，我们开发了一个系统，该系统使用Chasen和一套全新的语法规则和词典，从语料库中自动提取词汇项。主要词的词汇描述及在此基础上的标签附加。基于约束型日语语法中常见的特征结构，我们对主要名词和动词进行了全面的词汇描述。然后为给定的语料库选择了一组标签，并设计了一个通用的标签系统。语法开发工具系统的开发。我们开发了一个特征结构的GUI编辑系统，并将其集成到一个完整的语法开发系统中。通过在解析系统中使用该系统，澄清了语法系统中的一些问题。解析为约束转换。我们已经开发了一个使用一般约束处理过程的解析系统，它不依赖于特定类型的信息（语音、句法或语义）或对其的实际操作。将该系统应用于标注和对话系统的设计。婴儿语言习得过程的研究。利用幼儿动词习得过程中的数据，分析了幼儿动词的形态特征、主语选择和语序选择。我们也尝试利用婴儿的标记数据来分析连续获取过程。

This study attempted to set up a basis for designing grammatical framework for a comprehensive and systematic description of the Japanese language and developing a solid Japanese grammar system based on the constraint-based grammar formalism, in which there are no derivational concepts like transformations.We have achieved the following results :1. Automatic extraction of lexical items from corpora. Given electronic corpora, e.g., the Mainichi Shimbun on CD-ROM, we have developed a system that automatically extracts lexical items from the corpora using Chasen with an entirely new set of grammar rules and dictionary.2. Lexical description of major words and tag attachment based on it. Based on the feature structure commonly assumed in constraint-based Japanese grammar, we have comprehensive lexical description for major nouns and verbs. A set of tags for the given corpora was then selected and a tagging system for general use was designed.3. Development of tool system for grammar development. We have developed a GUI editing system for feature structures and incorporated it into an integrated grammar development system. By using such a system in a parsing system, a number of problems in the grammar system were clarified.4. Parsing as constraint transformation. We have developed a parsing system using general constraint processing procedures that don't depend on a particular kind of information (phonological, syntactic, or semantic) or the actual operation on it. Such a system was utilized in tagging and the design of dialog system.5. Study of language acquisition process for infants. Using data from infants in the process of acquiring verbs, their morphological properties as well as the selection of subjects and word order were analyzed. We have also attempted to utilize tagged data from infants in the analysis of continuous acquisition process.