These calculations might be based on visibility (whether the tag is in the sensor's line of sight), the signal strength, or the amount of time it takes the signal to travel from the tag to the sensor.
这些计算可能基于可见性(标签是否位于传感器的视线中)、信号强度或者信号从标签发送到传感器的时间量。
2
(LOVEM stands for line of visibility engineering methodology; see Resources for more information).
(lovem即line of visibility engineering methodology，请参阅参考资料以获得更多信息)。
3
For example you can switch from a free-form flowchart to a swimlane (line of visibility) view at any time.