计算机科学 ›› 2018, Vol. 45 ›› Issue (1): 113-117.doi: 10.11896/j.issn.1002-137X.2018.01.018
• CRSSC-CWI-CGrC-3WD 2017 • 上一篇 下一篇
铁文彦,范敏,李金海
TIE Wen-yan, FAN Min and LI Jin-hai
摘要： 多粒度决策系统是一类重要的关系数据库,最优粒度选择是研究多粒度决策系统的主要目的之一。讨论了对象更新环境下的多粒度决策系统的最优粒度选择。首先,介绍了多粒度信息系统和多粒度决策系统；然后,引入了广义决策函数,并利用此函数定义多粒度决策系统的协调性和最优粒度；最后,讨论了对象更新环境下不同协调性的多粒度决策系统的最优粒度的变化规律。
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