Funding for this research was provided by:
National Natural Science Foundation of China (61402185)
The 13th Five-Year plan for the development of philosophy and Social Sciences in GUANGZHOU (2018GZYB36)
Science Foundation of Guangdong Provincial Communications Department (2015-02-064)
South China Normal Q4 University–Bluedon Information Security Technologies Co, Ltd joint laboratory project (LD20170201)
Article History
First Online: 9 November 2018
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.