1. State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, No. 28, West Xianning Road, Xi'an, Shannxi 710049, China
2. The Polytechnic School, Arizona State University, 6075 Innovation Way West, Mesa, AZ 85212
3. 4480 Varsity Drive Suite G, Ann Arbor, MI 48103
4. School of Industrial and Systems Engineering, Georgia Institute of Technology, 765 Ferst Drive, Atlanta, GA 30332-0205