将近一半是所谓的“虚拟围墙”， 使用高科技传感器和照相机以及特别部署边界巡逻队的警卫。
Nearly half would be a so-called "virtual fence" utilizing high technology sensors and cameras as well as special deployments of Border Patrol agents.
提出一种利用传感器网络精细电子地图定位建立信息安全边界的方法。
This paper proposes a fine-grained radio-map localization based information security boundary in sensor network.
设计组合传感器定位系统实现工作区域的边界建立和识别。
The designed localization system with combined sensors serves robots reliably to establish and identify boundaries of the operational area.
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