Then it described the chinese patent classification, Chinese patent retrieval system and the method how to use them.
归纳了我国专利分类体系和专利文献的检索工具。
For enriching the database system of special education with ideal retrieval function, the facet classification, post controlled retrieval and hyper chaining techniques are employed.
为了使特殊教育数据库系统具有较为理想的检索功能，本系统采用了分面分类技术、后控检索技术、超链接技术。
This paper introduces the retrieval language, analyzes on the application of the retrieval language in library and retrieval system, and discusses on the methods for the classification and subject.
介绍了检索语言，分析了检索语言在图书馆和检索系统中的应用，论述了分类和主题方法。
应用推荐