针对不完备信息系统下容差关系和集对α相似关系等模型的局限性.结合权值和联合概率的概念,建立了基于重要度相似关系的模型,这种模型更符合实际应用的需要.
Because of the limitations of tolerance relation and set-pair similarity relation in incomplete information system, a new rough set model based on importance degree similarity was proposed with weighted value and joint probability. It is more suitable for practical application.