1. School of Engineering, Oral Roberts University, Tulsa, OK, USA
2. Software Engineering Institute, Dalian University of Technology, Dalian, China
3. Department of Industrial Engineering, Harbin Institute of Technology, Harbin, China
4. School of Software Engineering, Dalian Institute of Science and Technology, Dalian, China
5. Department of Computer Science and Technology, Harbin Engineering University, Harbin, China