1. School of Mathematical Science, Heilongjiang UniversityHarbin150080People's Republic of China
2. Department of AutomationUniversity of Science and Technology of ChinaHefei230027People's Republic of China
3. School of Computing, Engineering and Mathematics, Western Sydney UniversitySydneyNSW2751Australia
4. Key Laboratory of Technology in Geo‐Spatial Information Processing and Application System, Chinese Academy of SciencesBeijing100190People's Republic of China