Author(s): |
Yan Yan, College of Science, Hebei United University, Tangshan Hebei, China Dian-chuan Jin, College of Science, Hebei United University, Tangshan Hebei, China Jun-na Jiang, College of Science, Hebei United University, Tangshan Hebei, China Yan-kun Li, College of Science, Hebei United University, Tangshan Hebei, China |