supported by the National Natural Science Foundation of China (70961005);211 Project for Postgraduate Student Program of Inner Mongolia University;National Natural Science Foundation of Inner Mongolia (2010Zd34;2011MS1002)
The conventional data envelopment analysis (DEA) measures the relative efficiencies of a set of decision making units with exact values of inputs and outputs. In real-world prob- lems, however, inputs and outputs ty...