在分析现有超声波衰减理论模型的基础上，建立了混合粒度分布下超声波的衰减模型。
Based on the analysis of the existing theoretical model of ultrasonic attenuation, the model for ultrasonic attenuation of composite particle size distribution was established.
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。
Considering the relationship of the attenuation of wave and damage energy dissipation, a new rock damage model is developed for rock blasting.
岩体声波衰减品质因素Q值是反映岩体完整性程度的综合参数。寻找稳定、可靠、简便的计算方法是将Q值应用于现场测试的关键。
The quality factor Q of the acoustic wave attenuation is a comprehensive parameter reflecting the integrality degree of rock mass.
由于锚固体系中有不同大小和程度的缺陷，声波在传播过程中将产生能量衰减、相位突变及频散现象。
The existence of various lacunas in bolt bonding system will cause the acoustic wave energy attenuation, phase aberration and frequency dispersion.
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。
An acoustic log that USES the attenuation of compressional and shear waves to locate fractures.
该方法把由声波测井数据得到的斯通·利波衰减分为介质内衰减和孔隙流体渗流衰减两部分。
In this method, Stoneley wave attenuation from AC log is divided into two parts: attenuation through porous media and percolation attenuation through pore-fluid.
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.
材料对超声波的衰减是影响超声波探伤仪检测能力的主要因素之一。
Attenuation of ultrasonic wave by material is one of main factors influencing detection capability of ultrasonic wave defectoscope.
属于声波类型的一种测井方法。根据穿过裂缝的声波能量衰减来确定井眼附近岩石中裂缝的位置。
A wireline well log of the sonic type that locates fractures in the rocks adjacent to the wellbore by the attenuation of acoustic energy across the fracture.
根据连续分层介质中声波传播理论建立了计算水溶性高分子溶解过程中声衰减的数学模型。计算结果与实验结果一致。
Depending on the experimental result and the theory of sound wave propagation in layered medium, a mechanism of gradient water-soluble polymer solution was developed.
实验结果表明：超声波在高水基流体介质中的衰减与一定范围的介质浓度存在较好的线性关系。
The results of experiments show that there are obvious linearity relationship between the attenuation of ultrasonic and the concentration of high water based fluid in some ranges.
超声波在岩石中的衰减特征通常用岩石吸收品质因子(Q值)来表征。
The ultrasonic attenuation character in the rock is usually expressed by rock absorbability quality factor (q).
目的：探索胃肠内容物的声学特性及超声波经过胃肠内容物的衰减规律。
Objective: To research the acoustical quality of gastrointestinal contents and the attenuation criterion of ultrasound passing through gastrointestinal contents.
在高温状态下，超声波探伤实施的关键在于声耦合、声衰减和声路径的控制。
The linchpin of undertaking high temperature ultrasonic testing is the control of the coupling, attenuation and route of the sound.
织物对声波的衰减作用具有频率选择性。
The decline effect of fabric on sound wave has the chractaristic of frequency alternative.
采用数字手段测取了超声波信号的衰减系数，通过衰减系数可得出含沙量。
By using the digital means, the attenuation coefficient of the ultrasonic signal is measured, through which the sediment content can be obtained.
随着波长的增大或介质黏度的减小，声波的衰减减缓，压力梯度越小。
The attenuation of the sound waves leads to a negative exponent pressure gradient.
使声波信号沿着发射器和接收器之间的套管井壁传播时的幅度衰减确定套管外水泥胶结质量的声波测井方法。
A log that USES the variations in amplitude of an acoustic signal traveling down the casing wall between a transmitter and receiver to determine the quality of cement bond on the exterior casing wall.
基本原理是声波信号在胶结存在时的衰减比胶结差时的要大。
The fundamental principle is that the acoustic signal will be more attenuated in the presence of cement than if the casing were uncemented.
隧洞开挖以后围岩会出现损伤，并在洞周形成开挖损伤区，在损伤区范围内声波波速会出现衰减。
When the tunnel is excavated, the surrounding rock will be damaged and the damage zone will be formed around the profile where the acoustic velocity will weaken.
超声波具有指向性好，在水中衰减小，束射特性优良。
Ultrasonic has a good pointing, the attenuation in water is small, beam radio feature fine.
实验表明额隆内有若干点声衰减为负值及零值、意味着声波沿这些点传输时、声压非但不减小反而增大了。
The experiment showed that in the melon slices there were some points where the sound pressure attenuation coefficient were negative value or zero.
在饱和盐水的岩石中，声波振幅随频率的增高而呈指数衰减。
Amplitude has exponential decrease with increasing frequency in brine-saturated rocks.
不同频率的低频声波在底质中的吸收衰减各不相同。
Sound wave consists of different frequency, and the sound wave's attenuation is variety in many different sediments.
采用时间增益补偿技术，补偿超声波在空气中的衰减，减少回波信号的起伏；由有源全波整流电路和微分电路等组成峰值时间检测电路，可正确检测回波的峰值到达时间。
The peak time detecting circuit which is composed of full-wave rectification circuit and differential circuit can detect the reach time of echo signal accurately.
采用时间增益补偿技术，补偿超声波在空气中的衰减，减少回波信号的起伏；由有源全波整流电路和微分电路等组成峰值时间检测电路，可正确检测回波的峰值到达时间。
The peak time detecting circuit which is composed of full-wave rectification circuit and differential circuit can detect the reach time of echo signal accurately.
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