1. School of Sciences, Yanshan University, Qinhuangdao, People's Republic of China
2. LE STUDIUM RESEARCH PROFESSOR, Loire Valley Institute for Advanced Studies, Orléans, France
3. PRISME (INSA-Institut National des Sciences Appliquées) -88, Bourges, France
4. INSA Centre Val de Loire, Université d'Orléans, Bourges Cedex, France