College of Electrical and Information Engineering， Shaanxi University of Science & Technology, Xi’an 710021, China
Department of Physics, Xianyan Normal University, Xianyang 712000, China

Copyright © Mingwei Wang, zhan Yao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

How to Cite this Article

Download citation as EndNote