On three types of covering-based rough sets
Web25 de fev. de 2024 · In this paper, we mainly construct three types of L-fuzzy β-covering-based rough set models and study the axiom sets, matrix representations and interdependency of these three pairs of L-fuzzy β ... Web15 de out. de 2012 · Three types of covering-based rough set models already exist [3], [4], [34], [60]. Zakowski extended Pawlak’s rough set theory by using a covering of the …
On three types of covering-based rough sets
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Web1 de set. de 2007 · In this paper, based on fuzzy neighborhoods, we propose two types of covering-based variable precision fuzzy rough sets (CVPFRSs) via fuzzy logical … WebAbstract. In this paper, six types of optimistic multi-covering rough set models and six types of pessimistic multi-covering rough set models are proposed in multi-covering approximation space. From three different points of views, relationships among multi-covering rough set models are deeply investigated.
WebAbstract. In this paper, six types of optimistic multi-covering rough set models and six types of pessimistic multi-covering rough set models are proposed in multi-covering … Web15 de out. de 2012 · Three types of covering-based rough set models already exist [3], [4], [34], [60]. Zakowski extended Pawlak’s rough set theory by using a covering of the domain, rather than a partition [46]. The new model is often referred to as the first type of covering-based rough sets.
Web20 de ago. de 2013 · However, it is noticeable that MGRS theory cannot be applied in multi-source information systems with a covering environment in the real world. To address this issue, we firstly present in this paper three types of covering based multigranulation rough sets, in which set approximations are defined by different covering … Web12 de mai. de 2006 · Rough sets, a technique of granular computing, deal with the vagueness and granularity in information systems. They are based on equivalence relations on a set, or equivalently, on a partition on the set. Covering is an extension of a partition and a more feasible concept for coping with incompleteness in information, thus the …
Web1 de ago. de 2007 · Rough set theory is a useful tool for data mining. It is based on equivalence relations and has been extended to covering-based generalized rough …
Web7 de jul. de 2016 · Definition 3. Let ( U , C) be a covering approximation space. Then, by combining lower approximation operators of types 6, 7, 8, and 10 with upper approximation operators of types 1, 4, and 5, we can define twelve different types of covering based rough set as follows: C ¯ 61 ( X) = ∪ { C F r i e n d s ( x) x ∈ X - C 6. ̲. crystal reports 2010WebCovering-based rough sets are natural extensions of the classical rough sets by relaxing the partitions to coverings and have been applied for many ... Zhu, W., Wang, F.: On three types of covering rough sets. IEEE Transactions on Knowledge and Data Engineering 19, 1131–1144 (2007) CrossRef Google Scholar ... dying hair light blueWeb18 de jan. de 2024 · Request PDF On three types of soft fuzzy coverings based rough sets Recently, the concept of soft fuzzy rough covering was defined and their properties were studied by Zhan et al.. (Zhan and ... crystal reports 2011 for sageWeb1 de out. de 2012 · We propose a framework for the study of covering based rough set approximations. Three equivalent formulations of the classical rough sets are examined by using equivalence relations, partitions, and σ -algebras, respectively. They suggest the element based, the granule based and the subsystem based definitions of … dying hair eyebrows with dyeWeb15 de out. de 2012 · Based on the definitions of the three types of covering rough sets in , , , we define a new type of covering rough set model as follows . In this type of … crystal reports 2011 installerWeb1 de abr. de 2024 · Furthermore, three new types of fuzzy covering-based rough set models as generalizations of Ma's models are first proposed in this paper. ... F. Wang, On three types of covering rough sets, IEEE Trans. Knowl. Data Eng., 19 (2007) 1131-1144. Google Scholar Digital Library; crystal reports 2013Web29 de nov. de 2014 · Covering is a common form of data representation, and covering-based rough sets, a technique of granular computing, provide an effective tool to deal with this type of data. However, many important problems of covering-based rough sets, such as covering reduction, are NP-hard so that most algorithms to solve them are greedy … dying hair on top of dyed hair