摘要
针对决策为集合值的数据集的知识约简问题,定义了决策集值系统、确定性决策集值系统和倾向性决策集值系统等几类决策系统的概念。对比了决策集值系统与相类似的几类信息系统的区别,明确了决策集值系统的相关特点。结合三支决策方法,定义了决策集值系统上的单值约简与多值约简的概念,并给出了在确定性决策集值系统上计算约简的方法。结果表明,该方法在确定性决策集值系统上能有效提取信息。
To solve the problem of knowledge reduction in data sets with a set⁃valued decision,several types of decision systems such as decision set⁃valued systems,certainty decision set⁃valued systems and propensity decision set⁃valued systems are first defined.A comparative study is then discussed on decision set⁃valued systems and several relevant types of information systems,and characteristics of decision set⁃valued systems are clarified.Finally,combined with the three⁃way decision method,notions of single⁃valued reducts and multi⁃valued reducts in decision set⁃valued systems are proposed and a method for the computation of reducts in decision set⁃valued systems is explored.The results show that the method can effectively extract information on certainty decision set⁃valued systems.
作者
方逢祺
吴伟志
FANG Fengqi;WU Weizhi(School of Information Engineering,Zhejiang Ocean University,Zhoushan 316022,Zhejiang,China;Key Laboratory of Oceanographic Big Data Mining and Application of Zhejiang Province(Zhejiang Ocean University),Zhoushan 316022,Zhejiang,China)
出处
《山东大学学报（理学版）》
CAS
CSCD
北大核心
2024年第5期82-89,99,共9页
Journal of Shandong University(Natural Science)
基金
国家自然科学基金资助项目(12371466,61976194,62076221)。
关键词
粒计算
信息系统
决策集值系统
三支决策
granular computing
information systems
decision set⁃valued systems
three⁃way decision
