Studies on Corpus Creation and Use for Linguistic Research

在语言处理研究方面，我们将正在开发的日语词法分析器、日语依存分析器等语言分析工具用于汉语分析;在词典开发方面，我们实现了汉语未登录词分析系统，并通过在大规模汉语语料库上运行该系统，提取了新词候选词。通过本实验，我们可以成功地构建一个大规模的汉语词典，约有十万个词条。对于日语，我们描述了日语复合词的组成词信息，并将这些信息登记在词典中。在英语方面，我们提出了一种区分英语多词表达的字面用法和习惯用法的方法，并取得了较高的准确率;在语料库工具方面，我们对标注语料库和词典词条的数据库方案进行了详细的设计，并在此基础上重新实现了语料库管理工具。实现了词性和依存关系分析错误的纠错功能，并设计和实现了相应的接口。实现了短语组块及其依存关系的可视化功能，并在此基础上实现了纠错功能之一。开发的语料库管理工具向公众开放，我们举办了两次研讨会，向有兴趣使用该系统的人开放并解释使用方法，旨在收集用户的反馈。我们还打开了一个网页，介绍和下载这些工具。

As for the research for language processing, we augmented the language analysis tools we have been developing, such as Japanese morphological analyzer and Japanese dependency analyzer, for Chinese analysis.As for development of dictionaries, we implemented unknown word analysis system for Chinese, and extracted candidates of new word entries by running the system on a large scale Chinese corpus. Through this experiment, we could successfully construct a large scale Chinese dictionary with about a hundred thousand word entries. For Japanese, we described the constituent word information of Japanese compound words and registered these information in the dictionary. For English, we developed a method for distinguishing literal and idiomatic uses of English multi-word expressions, and showed a high accuracy in distinguishing them.As for the corpus tool development, we made a detailed design of the database schemes for annotated corpus and dictionary entries, and re-implemented the corpus management tool based on these schemes. We also implemented the error correction functions for part-of-speech and dependency analysis errors and designed and implemented the interface for the functions. The visualization function for showing phrasal chunks and their dependency relation, on which one of the error correction functions is realized.The developed corpus management tools are made open to public and we hold two seminars to make it open and to explain the usage to those interested in using the system, aiming at collecting the feedback from the users. We also opened a Web page for introducing and downloading the tools.