1. State Key Laboratory of Marine Resource Utilization in the South China Sea, Hainan University, Haikou, China
2. College of Information Science and Technology, Hainan University, Haikou, China
3. School of Computer and Information, Shanghai Polytechnic University, Shanghai, China
4. College of Information Engineering, Yangzhou University, Yangzhou, China
5. China University of Geosciences, Beijing, China
6. Hithink RoyalFlush Information Network Co., Ltd, Shenzhen, China