作者机构:[1]Department of Physics and Mathematics, Changzhou University, Changzhou 213016, P. R. China, [2]College of Mathematics and Physics, Anyang Institute of Technology, Anyang 455000, P. R. China
相关基金:Acknowledgment This work was supported by NSFC (Nos. 11501056, 11271314) and Plan for Scien- tific Innovation Talent of Henan Province (No. 144200510021).