1. Department of Computer Science and Engineering, The Chinese University of Hong Kong, 26451 Hong Kong, Hong Kong, Hong Kong, (e-mail: shangfanhua@hotmail.com)
2. School of Artificial Intelligence, Xidian University, 47905 Xian, Shaanxi, China, (e-mail: huanghua1115@outlook.com)
3. Institute of Mathematics, Hebei University of Technology, 12606 Tianjin, Tianjin, China, (e-mail: fanjunmath@hotmail.com)
4. Department of Systems Engineering and Engineering Management, The Chinese University of Hong Kong, 26451 Hong Kong, Hong Kong, Hong Kong, (e-mail: liuyuanyuan0917@hotmail.com)
5. School of Artificial Intelligence, Xidian University, 47905 Xian, Shaanxi, China, (e-mail: hyliu@xidian.edu.cn)
6. School of Artificial Intelligence, Xidian University, 47905 Xian, Shaanxi, China, (e-mail: liujianhui@stu.xidian.edu.cn)