Funding for this research was provided by:
National Natural Science Foundation of China (61562007, 61762017)
National Natural Science Foundation of China (61702332)
National Natural Science Foundation of China (61672354)
Guangxi “Bagui Scholar” Teams for Innovation and Research
Guangxi Natural Science Foundation (2017GXNSFAA198222)
Guangxi Natural Science Foundation (2015GXNSFDA139040)
Project of Guangxi Science and Technology (GuiKeAD17195062)
Project of the Guangxi Key Lab of Multi-source Information Mining & Security (16-A-02-02, 15-A-02-02)
Innovation Project of Guangxi Graduate Education (XYCSZ 2018076)
Article History
Received: 13 February 2018
Revised: 29 July 2018
Accepted: 16 August 2018
First Online: 28 August 2018