New Attribute Reduction Method Based on Information Quantity in Incomplete Information System
Focusing on incomplete information system,a new method of attribute reduction based on information quantity is put forward.On one hand,this approach improves traditional tolerance relation calculation methods.On the other hand,a new method is present for calculating the core of attributes on the basis of tolerance relation,which can get core directly.So the method can lower time complexity greatly in the process of attribute reduction calculation.In conclusion a new information system based on incomplete information system about information quantity is designed and the analysis of the realistic example shows that the algorithm is accurate and effective.