面向无人机应用的低空空域资源研究探讨
廖小罕, 黄耀欢, 徐晨晨

Views on the study of low-altitude airspace resources for UAV applications
LIAO Xiaohan, HUANG Yaohuan, XU Chenchen
图3 通过时间和空间分离消除四维空间冲突[35]
Fig. 3 Elimination of conflicts in four-dimensional space by spatio-temporal separation[35]