À propos de cet article
Publié en ligne: 14 juil. 2009
Pages: 61 - 65
DOI: https://doi.org/10.2478/v10037-009-0006-x
This content is open access.
Bo Li
Qingdao University of Science and Technology, China
Xiquan Liang
Qingdao University of Science and Technology, China
Pan Wang
Qingdao University of Science and Technology, China
Yanping Zhuang
Qingdao University of Science and Technology, China