计算机科学与探索Issue(1)：112-118,7.DOI:10.3778/j.issn.1673-9418.1406021
序信息系统下变精度与程度的“逻辑或”粗糙集
Rough Set Based on Logical Disjunct Operation of Variable Precision and Grade in Ordered Information System
摘要
Abstract
Variable precision rough set model and grade rough set model are two important expanding rough set models. Precision and grade relate to the relative and absolute quantitative information in approximate space respec-tively. To integrate relative quantitative information and absolute quantitative information and make rough set possess the stronger data processing ability and wider application fields, this paper proposes the model of rough set based on logical disjunct operation of variable precision and grade in ordered information system. This paper also discusses the basic structure and accurate description of a rough set respectively, and investigates some important properties of the model carefully. Furthermore, this paper analyzes a specific case study about the student achievement, discusses the significance of study on logical disjunct operation of variable precision and grade rough set models, and provides more abundant theoretical basis for knowledge discovery in ordered information systems.关键词
变精度粗糙集/程度粗糙集/序信息系统/逻辑或Key words
variable precision rough set/grade rough set/ordered information system/logical disjunct operation分类
信息技术与安全科学引用本文复制引用
余建航,徐伟华..序信息系统下变精度与程度的“逻辑或”粗糙集[J].计算机科学与探索,2015,(1):112-118,7.基金项目
The National Natural Science Foundation of China under Grant Nos.61105041,61472463,61402064(国家自然科学基金) （国家自然科学基金）
the Natural Science Foundation of Chongqing under Grant No. cstc2013jcyjA40051(重庆市自然科学基金) （重庆市自然科学基金）
the Fund of Key Laboratory of Intelli-gent Perception and Systems for High-Dimensional Information, Ministry of Education, Nanjing University of Science and Technology under Grant No.30920140122006(南京理工大学高维信息智能感知与系统教育部重点实验室基金) （南京理工大学高维信息智能感知与系统教育部重点实验室基金）
the Graduate Innovation Foundation of Chongqing University of Technology under Grant No. YCX2014236(重庆理工大学研究生创新基金) （重庆理工大学研究生创新基金）
