This shows that an earthquake may be predicted by making use of the variations of the frequency attenuation coefficient if the available data are properly processed.
这表明，经过适当处理，是可以根据频率衰减系数的变化来预报地震的。
The attenuation coefficient decreases with increasing of frequency and the gas density.
衰减系数随频率增加而减小，并且随密度增加而减小。
The attenuation coefficient shows approximately linear behaviour with frequency over the frequency range used, and the attenuation slope increases with the void content.
结果表明：超声衰减系数与频率之间存在线性关系，而且其斜率随孔隙率的增大而增大。
The viscosity coefficient of pore fluid in saturated sandstone has an obvious effect on the attenuation, modulus, and velocity dispersion in low frequency range.
饱和砂岩中扎隙液体的粘滞系数对饱和砂岩的衰减、模量和速度色散的影响在较低频段是明显的。
There is a heavy attenuation property and there exist sensitive relationships of increase function between attenuation constant and frequency, porosity, osmotic coefficient;
具有强衰减性，衰减系数与频率、孔隙度和渗透系数间存在敏感的增函数关系；
Results Compared with sound velocity and attenuation, the backscatter coefficient could reflect the structural change of biological tissue. The high frequency ul…
结果高频背向散射系数较声速、声衰减更能反映组织结构的变化，高频超声图像具有高的分辨率。
Results Compared with sound velocity and attenuation, the backscatter coefficient could reflect the structural change of biological tissue. The high frequency ul…
结果高频背向散射系数较声速、声衰减更能反映组织结构的变化，高频超声图像具有高的分辨率。
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