%0 Journal Article %A $authorName.trim() %A $authorName.trim() %A $authorName.trim() %T %D 2009 %R %J Journal of Guilin University of Technology %P 35-39 %V 29 %N 1 %X %U http://manu28.magtech.com.cn/Jweb_gllg/EN/abstract/article_1021.shtml