熵理论是信息系统中不确定性研究的有效工具之一。首先给出了集值信息系统的相容关系,在此基础上引入了粗糙熵。讨论了粗糙熵的最大、最小值,并证明了粗糙熵的单调性。
Entropy theory is an effective tool for uncertainty study.Based on a tolerance relation defined on a set-valued information system,rough entropy is proposed.The maximum and minimum values of rough entropy are shown.And the monotony of rough entropy is also proved.