1. a Department of Mechanical Engineering , School of Information Science & Engineering, Northeastern University (NEU) , Shenyang, Liaoning 110004, P. R. China
2. b Department of System Engineering , School of Information Science & Engineering, Northeastern University (NEU) , Shenyang, Liaoning 110004, P. R. China
3. c Department of Manufacturing Engineering & Engineering Management , City University of Hong Kong , 83 Tat Chee Avenue, Kong Loon, Hong Kong, P. R. China