1. School of Mathematics, Sichuan University of Arts and Sciences, Dazhou, China
2. Key Laboratory of Intelligent Education Technology and Application of Zhejiang Province, Zhejiang Normal University, Jinhua, China
3. School of Computer Science, Southwest Petroleum University, Chengdu, China
4. College of Science, China Jiliang University, Hangzhou, China
5. College of Standardization, China Jiliang University, Hangzhou, China