摘要
针对数据的不完备性 ,提出一种新策略 ,通过在局部站点上增加知识层——用已知属性值粗略表示不确定属性值的一套规则 ,将分布式信息系统转换为分布式知识系统 ,利用多个站点的信息协作解决了查询异常问题 ;给出一个新的协作知识系统的框架 ,论述了知识层的内容与构造方法 .最后针对不完备的信息系统 ,给出一种协作的查询处理算法 .
A new mechanism of resolving data incompletion is presented in this paper. By adding new knowledge in local sites, which is a set of rules expressing the values of unknown attributes using the values of known attributes, a distributed information system is transformed into a distributed knowledge system, and the question is resolved by cooperation among multi sites. A new architecture of the cooperation knowledge based system is also discussed, and the content and construction method of the knowledge level are described. Finally, a cooperation algorithm of processing query is given.
出处
《计算机研究与发展》
EI
CSCD
北大核心
2000年第12期1428-1433,共6页
Journal of Computer Research and Development
基金
铁道部科技研究发展计划基金资助(项目编号2000X030-A)
