They have been widely applied to describe the uncertain data in decision systems.
他们已被广泛地应用于决策系统中对不确定决策数据的描述。
This paper sums up a mathematical model of two-stage decision systems and presents its special forms .
对二层决策系统的数学模型进行了综述，并提出了一种特殊类型的二层决策模型。
Based on feedback extension, we give a kind of decision methods facing directly objectives, which can be used to not only fuzzy decision systems, but also ordinary decision processes.
基于反馈外延，建立了一种直接面向目标的决策方法，它既适用于模糊的决策系统，亦可用于普通的决策过程。
The main contents include the approximation set, decision systems, data preprocessing and attribute reduction and so on. It is a effective method of dealing with incomplete, inaccurate data.
其主要内容包括近似集、决策系统、数据预处理以及属性约简等等，是一种处理不完整，不精确数据的有效方法。
Based on the rough model under the similarity relation, some basic properties are studied, and a knowledge acquisition algorithm based on the similarity relation in decision systems is discussed.
本文基于一种相似关系下的粗糙集模型，给出了一些基本性质，讨论了该相似关系下的决策系统的知识获取算法。
Based on the rough model under the similarity relation, some basic properties are studied, and a knowledge acquisition algorithm based on the similarity relation in decision systems is discussed.
本文基于一种相似关系下的粗糙集模型，给出了一些基本性质，讨论了该相似关系下的决策系统的知识获取算法。
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