1. College of Computer and Information, Hohai University, Nanjing, China
2. School of Information Engineering, Zhengzhou University, Zhengzhou, China
3. Department of Biomedical Informatics and Medical Education, University of Washington, Seattle, USA
4. School of Information Engineering, Yancheng Teachers University, Yancheng, China
5. Information Center, Yellow River Conservancy Commission (YRCC), Zhengzhou, China;