基于Vague集的次协调数据库的研究

摘要

次协调数据库的数据模型是用来处理数据库中不完全信息和矛盾信息。基于这种数据模型，将Vague集的概念引入，并基于新模型重新定义选择、投影、连接及decision等运算，再使用基于Vague集的次协调数据库的查询语言（PQL）查询矛盾信息并作出决策以解决矛盾，从而扩展了传统次协调数据库模型的应用。%Paraconsistent database is introduced to manipulate incomplete and inconsistent data in database. In this article, it extends the application of this database by introducing the concept of Vague set and redefining the relation operators such as selection, projection, join and decision, which still enables the database to search the contradictory information, then it manipulates the corresponding information with PQL to decide which side of contradiction should take.