Based on Maxwell equations and the boundary conditions under specified conditions, the formulas of EM wave attenuation rate can be obtained through solving the mode equations.
利用麦克斯韦方程组及其在特定条件下需满足的边界条件,求解波模方程式可以得到电磁波在传播过程中的衰减率。
参考来源 - 煤矿井下受限空间内电磁波的传输特性研究The attenuation rate of the wave band of airborne radio equipment is discussed. The influence of rainfall intensity,electromagnetic wave frequency,launching elevation angle,polarization and time probability on the rain attenuation is analyzed.
在传统降雨衰减率模型基础上,给出了电波传输地空电路模型;对机载设备各波段传输衰减率进行了仿真计算,并分析了雨强、电波频率、发射仰角、极化方式及时间概率等参数对降雨衰减的影响。
参考来源 - 降雨对机载无线电设备电磁波传输的衰减特性分析·2,447,543篇论文数据，部分数据来源于NoteExpress
However its evaporation attenuation rate is less than the former one.
前两类油种则蒸发衰减较快。
Some papers indicate that using high attenuation rate neutral filter can expand the measuring range of CCD.
多篇文献提出在CCD前加高衰减率的中性滤光片来扩大测温范围。
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。
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