Authors: SUN Tie-cheng¹ stceeacl@hit.edu, LU Zhen-zhen¹, ZHONG Gui-lie¹, GUO Zhi-gang¹, Liang Lian¹

Superior Title: Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban. 2009, Vol. 41 Issue 1, p101-104. 4p. 16 Diagrams.