Based on the theory of the rough sets, this paper comprehensively considered the degree of the impact of each value of the condition attribute to decision attribute, and sum up these impacts as the weight of the attribute, then adopt the weight as the heuristic function to weight the significance of attribute. On the basis of this, an attribute reduction algorithm based on weight has been constructed by using the method of reducing domain step by step. This algorithm has been applied in information management systems of Wuhan City KANG Long Yi-jun health examination centers. With the horizonta...
