1. Lecturer, School of Mechanical Engineering and Automation, Fuzhou Univ., Fuzhou 350108, People’s Republic China.
2. Professor, Engineering Science Programme, Faculty of Engineering, National Univ. of Singapore, Kent Ridge, Singapore 119260, Singapore.
3. Associate Professor, INSA de Rennes, LGCGM 20, Universite Europeenne de Bretagne, Avenue des Buttes de Coesmes, 35043 Rennes Cedex, France.