1. School of Mathematical Sciences, Tiangong University, Tianjin, People's Republic of China
2. Center for Advanced Information Technology, Kyung Hee University, Seoul, Korea
3. The Key Laboratory of Intelligent Information and Big Data Processing of NingXia Province, and Health Big Data Research Institute, North Minzu University, Yinchuan, People's Republic of China
4. Gheorghe Mihoc-Caius Iacob Institute of Mathematical Statistics and Applied Mathematics of the Romanian Academy, Bucharest, Romania
5. Department of Mathematics and Informatics, University ‘Politehnica’ of Bucharest, Bucharest, Romania
6. Research Center for Interneural Computing, China Medical University Hospital, China Medical University, Taichung, Taiwan