针对信息系统不完备性的粗糙集分层递阶约简  

The Hierarchical Reduction Approach to Incomplete Information System

作　　者：乔斌[1] 郑洪涛[1] 郭智疆[1] 李玉榕[1] 蒋静坪[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《电路与系统学报》2001年第2期78-82,共5页Journal of Circuits and Systems

基　　金：2000年国防科技预研跨行业基金资助项目(J16.6.3)

摘　　要：提出一种针对不完备信息系统的粗糙集分层递阶约简。该约简可以将信息系统中所有属性构成的单层知识表示变为符合人类认知习惯的部分属性所构成的多层知识表示。同时，分层递阶约简提高了粗糙集约简速度。无论是分层递阶约简，还是所得的分层递阶简约，都适用于实际问题。A hierarchical reduction approach of rough sets to incomplete information system is proposed. By this approach, knowledge is presented hierarchically with multiple levels. Part of attributes is allocated at each level instead of all attributes at only one level. This mechanism is consistent with the recognition laws of human being. Following this approach, computation can be made simple and fast. Both hierarchical reduction and reduct are useful in practical application.

关 键 词：粗糙集 不完备信息系统 分层递阶约简 

分 类 号：TP13[自动化与计算机技术—控制理论与控制工程]