基金Supported by the National Natural Science Fund (11061021)the National Science Foundation of Inner Mongolia (2012MS0106)the Endancing Comprehensive Strength Project of Inner Mongolia University (14020202)
基金Supported by the NNSF of China(60604004)the Special Projects in Mathematics Funded by NSF of Hebei Province(07M005)the Science and Technology Support Project of Qinhuangdao(201001A037)