Wang, Qiangfeng
Cao, Yan
Bai, Yu
Wu, Yujia
Wu, Qingyun
Funding for this research was provided by:
project from education department of Shaanxi Province (16JK1366)
president fund from Xi’an Technological University (XAGDXJJ1404)
Article History
Received: 30 July 2017
Revised: 16 December 2017
Accepted: 18 December 2017
First Online: 5 January 2018