TY - Journal of Shandong University(Engineering Science) A1 - T1 - Y1 - 2011-10-16 JF - Journal of Shandong University(Engineering Science) JO - Journal of Shandong University(Engineering Science) SP - 1 EP - 8 VL - 41 IS - 5 UR - http://gxbwk.njournal.sdu.edu.cn N1 - ER -