North China University of Science and Technology Mathematical modeling Association(NCUSTMMA) North China University of Science and Technology Tangshan Hebei 063000 ChinaSchool of Mining Engineering North China University of Science and Technology Tangshan Hebei 063000 China;
North China University of Science and Technology Mathematical modeling Association(NCUSTMMA) North China University of Science and Technology Tangshan Hebei 063000 ChinaSchool of Mechanical Engineering Tangshan North China University of Science and Technology Tangshan Hebei 063000 China;
School of Mechanical Engineering Tangshan North China University of Science and Technology Tangshan Hebei 063000 China;
Rough set; Time series; Weighted grey correlation analysis; Economic vitality; Influencing factors;