覆盖粗糙集模型增值算子及其性质

Icrement Operators and Their Property over Covering Rough Set Models

为了给不断发生变化的数据库的知识发现提供新的数学工具,本文引进覆盖粗糙集模型的确定增值算子ZX(Y)和不确定增值算子ZX(Y),并讨论了它们的有关性质,即通过研究两个新集合hX(x)、lX(x)的性质(定理2.1和定理2.2),给出并证明了两个增值算子的性质(定理2.3和定理2.4)。

Certain increment operator ZX（Y） and uncertain increment operator ZX（Y） are introduced in this article in order to provide a math tool for knowledge discovering in variational deta-base.Related property is also discussed here.Namely we study property of new sets hX（x） and lX（x）（included in Theorem 2.1 and Theorem 2.2） and on the other hand,we supply the property of the two operators and prove it in Theorem 2.3 and Theorem 2.4.