Published on in Vol 23, No 1 (2021): January
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/13556, first published
.
1 School of Computer Science and Technology, Hubei University of Science and Technology, Xianning, China
2 Chongqing Aerospace Polytechnic, Chongqing, China
3 School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing, China