Key Fund for Provincial Natural Science Research Project of Universities in Anhui Province (No.KJ2015A417, No.KJ2016A493);Anhui Higher Education Revitalization Program - Program for Distinguished Young Talents in Higher Education of Anhui Province (No.GXYQZD2016529);Haozhou Industrial Innovation Team Project of Anhui Province (亳组[2015]20号-2)
Incremental attribute reduction is a data mining method for dynamic environment. The incremental attribute reduction algorithm already proposed is only applicable to symbolic information systems. However
there are few related studies on mixed information systems
which promotes the construction of the related incremental attribute reduction algorithm under the mixed information system. The discernibility degree is an important method used for designing attribute reduction. In this paper
the traditional discernibility degree is generalized under the mixed information system
and the concept of neighborhood discernibility degree is presented. Then
the incremental learning of neighborhood discernibility degree is studied respectively when objects increase or objects decrease under the mixed information system. Finally
according to this incremental learning
the corresponding incremental attribute reduction algorithms are proposed
respectively. The related experimental results on the UCI data set show that the proposed incremental attribute reduction can update the reduction results more quickly than the non incremental attribute reduction.