| Affiliation: | College of Physics Science & Technology, Hebei University, Baoding 071002, China;Tangshan Vocational & Technical College, Tangshan 063000, China;College of Physics Science & Technology, Hebei University, Baoding 071002, China;College of Physics Science & Technology, Hebei University, Baoding 071002, China;College of Physics Science & Technology, Hebei University, Baoding 071002, China;College of Physics Science & Technology, Hebei University, Baoding 071002, China;College of Physics Science & Technology, Hebei University, Baoding 071002, China;Industrial & Commercial College, Hebei University, Baoding 071002, China;College of Physics Science & Technology, Hebei University, Baoding 071002, China;Department of Foreign Language Teaching and Research, Hebei University, Baoding 071002, China |
