TY - Journal of Shandong University(Engineering Science) A1 - SHI Jun, ZHU Min T1 - An optimization model for forecasting based on grey system and support vector machine Y1 - 2012-10-20 JF - Journal of Shandong University(Engineering Science) JO - Journal of Shandong University(Engineering Science) SP - 7 EP - 11 VL - 42 IS - 5 UR - http://gxbwk.njournal.sdu.edu.cn N1 - ER -