1. School of Electronic Information and Electrical Engineering, Shangluo University, Shangluo 726000, P. R. China
2. Research Center of Artificial Intelligence of Shangluo, Shangluo University, Shangluo 726000, P. R. China
3. Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, College of Chemical Engineering and Modern Materials, Shangluo University, Shangluo 726000, P. R. China