Computer Science ›› 2016, Vol. 43 ›› Issue (2): 269-272.doi: 10.11896/j.issn.1002-137X.2016.02.056

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Rough Set Model Based on Logical And Operator and Logical Disjunct Operator of Variable Precision and Grade in Ordered Information System

YU Jian-hang and XU Wei-hua   

  • Online:2018-12-01 Published:2018-12-01

Abstract: In this paper,the rough set model based on logical and operator and logical disjunct operator of variable precision and graded was proposed in ordered information system.The new model is an expansion of the classical rough set,variable precision rough set and graded rough set model.The accurate description of this model was discussed and some important properties of this model were investigated carefully.Moreover,a specific case study about the student achievement was analyzed.This study provides a new way for the knowledge discovery in ordered information system.

Key words: Graded rough set,Logical and operator operation,Logical disjunct operator operation,Ordered information system,Variable precision rough set

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