Funding for this research was provided by:
Guangxi Natural Science Foundation (2018GXNSFBA281081)
Middle-aged and Young Teachers' Basic Ability Promotion Project of Guangxi (2017KY0247)
Guangxi Key Laboratory Fund of Embedded Technology and Intelligent System (2018A-07)
Article History
Received: 5 October 2018
Revised: 3 September 2019
Accepted: 1 November 2019
First Online: 16 December 2019