在激光雷达测量平流层下部臭氧时，我们发现光电倍增管接收到较低高度的强信号后，回波信号会产生光子并合现象。
In lidar measurements of ozone in lower stratosphere, the phenomena of photon overlap are found when PMT receive the stronger signals from lower altitude.
在激光雷达测量平流层下部臭氧时，我们发现光电倍增管接收到较低高度的强信号后，回波信号会产生光子并合现象。
In lidar measurements of ozone in lower stratosphere, the phenomena of photon overlap are found when PMT receives the stronger signals from lower altitude.
对管桩和混凝土板的传统无损检测方法则是基于一维波动理论的冲击回波方法，这种方法只能检测比较大的缺陷。
The traditional non-destructive method of pipe piles and concrete plates is impact-echo technique based on one-dimensional stress wave theory, and it can detect the big defects.
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