1. School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
2. Shaanxi Key Laboratory of Network Data Analysis and Intelligent Processing, Xi’an University of Posts and Telecommunications, Xi’an, Shaanxi 710121, China
3. School of Mathematics and Computer Science, Shaanxi University of Technology, Hanzhong 723000, China
4. Institute of IOT and IT-based Industrialization, Xi’an University of Posts and Telecommunications, Xi’an 710061, China