Expresss the factors resulting in the attenuation of acoustic waves.
请陈述导致超音波衰减的各项因素。
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。
The attenuation weak spot is the black strip in the lower left corner of the band.
天线的衰减弱点就是钢圈左下角的黑色覆盖物。
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 characteristics of ground vibration caused by pile driving were proposed.
从而得到了打桩引起的地面振动的衰减特性。
The attenuation of neutrons from a nuclear explosion involves several different phenomena.
核爆炸中子的减弱包括几种不同的现象。
The attenuation of neutrons from a nuclear explosion involves several different phenomena .
核爆炸中子的减弱包括几种不同的现象。
The attenuation formulas both of vertical and horizontal vibrating displacements are obtained.
得到竖向和水平向振动位移衰减公式。
An acoustic log that USES the attenuation of compressional and shear waves to locate fractures.
利用纵波和横波的衰减确定裂缝位置的一种声波测井方法。
However, it is not trivially easy to use this property for the attenuation of the detected surface-waves.
然而，利用这种性质来衰减观测的面波并非十分容易。
Assuming a trilinear geometrical spreading model, we obtained the attenuation function in Guangdong region.
采用三段几何衰减模型拟合，得到了广东地区的几何衰减函数。
Owing to the influence of thermal capacity in buildings, the attenuation of indoor temperature is very slow.
规律衰减，且由于建筑热容量的影响，室内温度变化是一个比较。
And the attenuation studies of seismic wave in the laboratory have provided studying base for the mechanism studies.
而实验室中对地震波衰减的研究为衰减机理提供了研究基础。
The buried pipe transfer equation, the frequency character and the attenuation equation of the leak signal are studied.
研究了埋地管道泄漏信号波的传播方程，泄漏信号频率特性以及衰减方程。
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 of X-ray through the object is non-linear and the gray level of image is non-linear response of object thickness.
射线穿过物体的衰减是非线性的，经过影像系统得到的图像灰度与物体厚度是非线性的关系；
In this paper, the distribution characteristic and the attenuation characteristic of number density of the bubbles were described.
阐述了舰船尾流气泡的分布特性和气泡数密度的衰减特性。
The attenuation formulae of HF bridge circuit with phase-ground coupling and adjacent phase impact or not are derived in this paper.
本文导出了不考虑邻相影响和考虑相邻影响条件下的相地耦合高频桥路衰减公式。
The attenuation of temperature wave in humid sand layer on an evaporation cooling roof differs from that in dry sand layer in essence.
有含湿砂层存在的被动蒸发冷却层屋面的温度波衰减，在本质上不同于干燥状态情况。
Even with the attenuation factor blending into our lighting equation, still, the maximum amount of light a surface receives is (N. L).
虽然我们已在光照方程式中加入了混合衰减因子，但是还需要表面的最大值光照数量。
The result showed that the attenuation of residual stress of autofrettaged thick-walled cylinder reached about 30% under cycle loading.
研究结果表明，厚壁筒自增强残余应力在循环载荷的作用下，残余应力衰减达到近30%。
How to control the attenuation of the beer reasonably and accurately is studied from fermentation control with the quantitative concept.
本文从发酵控制的角度，用“量”的概念阐述了如何合理、准确地控制发酵度的问题。
The attenuation of seismic wave in near offset can more correctly reflect the lithologic information of formation than that in far offset.
近炮检距处地震波的衰减较之远炮检距的相应衰减量更能准确反映地层的岩性信息。
The power line channel noise is simulated by MATLAB and the attenuation is simulated through the channel transmission module of FIR filter.
利用MATLAB及用fir滤波器做信道的传输函数模型对信道噪声和复衰减特性分别进行了建模。
Experimental results show that the attenuation of the maximum electric field value can reflect pulse electric field shielding effectiveness.
实验表明可用脉冲电场的峰值衰减量来评估屏蔽体的脉冲电场屏蔽效能。
The attenuation rate of horizontal vibration is different from that of vertical vibration and could not be expressed by using a same formula.
水平向振动与竖向振动衰减快慢不同，难以用同一衰减公式表示等有意义的结论。
Considering the relationship of the attenuation of wave and damage energy dissipation, a new rock damage model is developed for rock blasting.
在考虑岩石冲击损伤过程的声波衰减规律及其与能量耗散率关系的基础上，建立新的岩石爆破损伤模型。
The attenuation law of bearing capacity of partially corroded reinforced concrete beams is the basic problem of structural durability research.
局部锈蚀钢筋混凝土梁的承载力衰减规律是混凝土结构耐久性研究的基本问题。
The attenuation of the electromagnetic wave from the layers of the dust plasma increases with the increase of density and size of the dust grain.
并且尘埃等离子体层对电磁波的衰减随尘埃粒子浓度以及尘埃粒子半径的增大而明显增强。
When mud cake is thick, formation permeability and shear wave slowness evaluated from the attenuation of the amplitude of Stoneley wave are wrong.
当泥饼层较厚时，用斯通利波幅度衰减估算的地层渗透率及提取的横波时差是错误的结果。
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