The transient electromagnetic method has a maximum depth because of continuous attenuation by transmission of electromagnetic signal in underground.
由于电磁信号在地下传播时不断衰减，瞬变电磁测深法有一个最大探测深度。
The analysis results indicate that the attenuation of additional dynamic stress along depth is reduced with existence of the structure under rail.
结果表明轨下构筑物的存在将减弱列车动应力往深层传递的衰减。
Due to the surface retardation, the attenuation rate of velocity becomes quicker, which depends on water depth and jet width.
由于水面的阻滞，中轴线上垂向速度的衰减较自由射流快，衰减规律随水深和射流宽度而异。
The attenuation is extracted by the spectrum of the layers at different depth.
利用不同深度界面的回波频谱分析提取衰减系数剖面。
Reasonable results have been obtained from these experiments: both upwelling and downwelling light show exponential attenuation with increasing depth;
大部分数据显示， 水下上行光和下行光对深度有良好的指数衰减；
The higher the frequency of the artificial earthquake wave, electromagnetic wave and sonic wave, the higher the resolution, but the attenuation is very fast and the exploration depth is very shallow.
人工地震波、电磁波和声波的频率越高，分辨率越高，但衰减快，可探测深度也降低。
The higher the frequency of the artificial earthquake wave, electromagnetic wave and sonic wave, the higher the resolution, but the attenuation is very fast and the exploration depth is very shallow.
人工地震波、电磁波和声波的频率越高，分辨率越高，但衰减快，可探测深度也降低。
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