non-reflection attenuation 固有衰减
non reflection attenuation 固有衰减
multiple reflection attenuation 多次波衰减
reflection extrinsic attenuation 反射外质衰减
This paper proposed a new monitoring method based on reflection attenuation, which computes temperatures directly from the B-ultrasonic images and needs no more other equipments.
本文基于反射衰减法提出一种新的直接对B超图像进行处理得到温度的监测方法，无须增加其他附加设备。
The sphere affects the incident by the refraction, diffraction, reflection, absorption and attenuation of impurity.
这种球体对入射光存在折射、衍射、反射、吸收和杂质对入射光波的衰减作用等影响。
The ground reflection and attenuation must be properly accounted for in order to use the source spectrum measured at the site of the observer to predict the actual source spectrum in the free field.
为利用观察点处实测声频谱来预估实际声源自由场频谱特性，必须适当地计及地面反射和衰减效应的影响。
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