Information granulation and rough set approximation
نویسندگان
چکیده
منابع مشابه
Information granulation and rough set approximation
Information granulation and concept approximation are some of the fundamental issues of granular computing. Granulation of a universe involves grouping of similar elements into granules to form coarse-grained views of the universe. Approximation of concepts, represented by subsets of the universe, deals with the descriptions of concepts using granules. In the context of rough set theory, this p...
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In this paper, the concept of a granulation order is proposed in an information system. The positive approximation of a set under a granulation order is defined. Some properties of positive approximation are obtained. For a set of the universe in an information system, its approximation accuracy is monotonously increasing under a granulation order. This means that a proper family of granulation...
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Multiple granulation rough set approach to ordered information systems Weihua Xu a b c , Wenxin Sun c , Xiaoyan Zhang c & Wenxiu Zhang d a School of Management, Xi'an Jiaotong University, Xi'an, 710049, P.R. China b The Key Lab of the Ministry of Education for Process Control and Efficiency Engineering, Xi'an, 710049, P.R. China c School of Mathematics and Statistics, Chongqing University of Te...
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In this paper, the study of the evolution of approximation space theory and its applications is considered in the context of rough sets introduced by Zdzis law Pawlak and information granulation as well as computing with words formulated by Lotfi Zadeh. Central to this evolution is the rough-mereological approach to approximation of information granules. This approach is built on the inclusion ...
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A generalized multi-granulation rough set is proposed in this paper. In the new model, supporting characteristic function is defined and a parameter called information level is introduced to investigate that an object supports a concept precisely under majority granulations. Moreover, some important properties are discussed on the new multigranulation rough set. And it can be found that the pro...
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ژورنال
عنوان ژورنال: International Journal of Intelligent Systems
سال: 2000
ISSN: 0884-8173,1098-111X
DOI: 10.1002/1098-111x(200101)16:1<87::aid-int7>3.0.co;2-s