1. National Engineering Laboratory for Integrated Aerospace-Ground-Ocean Big Data Application Technology, School of Computer Science, and the Chongqing Science and Technology Innovation Center, Northwestern Polytechnical University, Xi’an, China
2. Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an, China
3. School of Computer Science, National Engineering Laboratory for Integrated Aerospace-Ground-Ocean Big Data Application Technology, Northwestern Polytechnical University, Xi’an, China
4. School of Artificial Intelligence, Optics and Electronics (iOPEN), Xi’an, China