Two New Types of Multiple Granulation Rough Set
                    
                        
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                    چکیده
منابع مشابه
Multiple granulation rough set approach to ordered information systems
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 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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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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The original rough set model was developed by Pawlak, which is mainly concerned with the approximation of sets described by a single binary relation on the universe. In the view of granular computing, the classical rough set theory is established through a single granulation. This paper extends Pawlak’s rough set model to amulti-granulation rough set model (MGRS), where the set approximations a...
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ژورنال
عنوان ژورنال: ISRN Applied Mathematics
سال: 2013
ISSN: 2090-5572
DOI: 10.1155/2013/791356