Funding for this research was provided by:
the Key Laboratory of IoT of Qinghai under grant (2020-ZJ-Y16)
the projects funded by Science and Technology Department of Qinghai Province (2018-ZJ-971Q 2019-ZJA10,)
Feitian Distinguished Professor Program of Gansu (2014-2016.)
the National Natural Science Foundation of China (11565023)
National Natural Science Foundation of China (11965016)
Article History
Received: 16 March 2021
Accepted: 2 May 2021
First Online: 20 May 2021