Zheng, Pengshe
Leng, Lihui
Funding for this research was provided by:
the Fund of Lab of Security Insurance of Cyberspace, Sichuan Province P.R.China (szjj2014-080)
Scientific Research Fund of Sichuan Provincial Education Department of China (15ZA0135)
Article History
Received: 7 August 2018
Accepted: 28 October 2018
First Online: 6 November 2018
Competing interests
: The authors declare that they have no competing interests.