1. College of Computer Science and Engineering, Shandong Province Key laboratory of Wisdom Mine Information Technology, Shandong University of Science and Technology, Qingdao, China
2. Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
3. Guangxi Key Lab of Trusted Software, Guilin University of Electronic Technology, Guilin, China
4. Center for Computational Intelligence, Faculty of Technology, De Montfort University, Leicester, UK