The connections between the properties of the mapping and approximation operators are discussed.
并讨论了映射的性质与近似算子性质之间的关系。
In this paper, interval structure of distributive BZ lattices and properties of rough approximation operators are discussed.
讨论了分配bz格的区间结构及其粗糙近似算子的性质。
In this paper, the approximation operators and the random sets, the best parts of the rough sets theory, are studied systematically.
本文对粗糙集理论中最基本的部分——近似算子及随机集进行了较系统的探讨。
The upper approximation and the lower approximation operators are defined in incomplete information system. Furthermore, some related properties are discussed.
定义了一种不完备信息系统的上、下近似算子，得到了一些相关的性质。
A method to construct a kind of combinatorial linear approximation operators is given and some linear operators which have special approximation properties are obtained.
给出一种构造组合线性逼近算子的方法。由此可得到具有特殊逼近性质的线性算子。
The properties of the homomorphic images of rough subrings and rough ideals are obtained by discussing the variation of approximation operators under homomorphic mapping in the ring.
对同态映射下环中近似集合的变化规律进行了讨论，得到了粗糙子环、粗糙理想同态象的若干性质。
In addition, on the direct product of rings, the approximation operators are introduced by using the direct product of fuzzy ideals and the relevant properties of approximation operators are derived.
另外，本文在环的直积结构上通过模糊理想的直积诱导近似算子，对相关近似算子的性质进行了研究。
In addition, on the direct product of rings, the approximation operators are introduced by using the direct product of fuzzy ideals and the relevant properties of approximation operators are derived.
另外，本文在环的直积结构上通过模糊理想的直积诱导近似算子，对相关近似算子的性质进行了研究。
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