Department of Computer'Science and Technology;
Tongji University;
Shanghai 201804;
China;
College of Computer Engineering;
Jiangsu Teachers University of Technology;
Changzhou 213015;
China;
Key Laboratory of Embedded System and Service Computing;
Ministry of Education of China;
Tongji University;
Shanghai 201804;
China;
Similarity relation; Attribute reduction; Hierarchical decision rules; Hybrid data;