波速

结论肝剪切波速可做为一种无创的预测临床诊断为慢性HBV携带者肝纤维化程度的参考指标。

Conclusion Liver shear wave velocity could be a non-invasive reference factor for staging hepatic fibrosis in chronic HBV carriers .

因此，桩间土的变形模量，即桩间土的瑞雷波速成为影响n取值的主要因素。

So the deformation modular of soil between piles , that is the Rayleigh wave velocity of soil between piles is the capitally influence the sampling of n.

孔隙率和温度有时也能影响地震波速

Seismic velocity can occasionally be affected by porosity and temperature .

BenderElements在测试土样剪切波速中的应用

Application of bender elements in measuring shear wave velocity of soil sample

现场化学灌浆前后的CT测试结果反应试验区坝基波速提高6%以上；

The geology CT test results shows that the wave velocity increases 6 % at the site of dam after grouting .

结果表明：πg波的初至波速为6.00km/s，与Press的结果相近；

The results show that , The first velocity is 6.0km / s , it is close to Press 's results ;

在场地波速测量中，由于噪声等因素的影响，很难准确识别P波、S波的初至时刻，致使波速结果存在很大的误差。

It is difficult to identify the arrival time of P and S waves in wave velocity logging , which yields great error for P and S wave velocities .

为了检测高压注浆加固效果，采用探地雷达、弹性波CT无损检测方法，配合所取岩芯的波速测试及点荷载强度试验，对码头水下高压注浆效果进行综合检测。

Non-destructive examination methods are used such as ground penetrating radar , elastic wave CT , wave velocity and point loading strength of the rock core specimens .

由于受初应力的影响，计算Rayleigh波速的公式变得复杂。

Because of effect of initial stresses the formula for calculating the Rayleigh wave velocity is complicated .

这里首先提出了一种计算EDA介质等效波速的几何平均法。

A geometric mean formula is first derived for the equivalent seismic velocity of EDA media .

利用现有的物性资料以及沉积层的厚度分布，线性插值得到各网格点的密度、波速以及Q值的深度分布，在此基础上建立二维横向非均匀结构模型。

Grid with the distribution of density , velocity and value which are provided by linear interpolation along the depth of the Quaternary sedimentary layer .

运用BP网络附加动量法和自适应学习速率法，建立神经网络模型，模拟计算涌潮波速。

By the use of the additional momentum method and adaptive learning rate of BP network , a neural network model was established to calculate the speed of tidal bore .

为获得不同断层构造的CT反演特征，通过实际地质模型探测实验，对断层构造与工作面巷道不同夹角的波速重建图像进行了对比研究。

Through practical detecting experiment in geological model , the velocity rebuilding images with different degree between fault structure and laneway were contrasted for getting the different CT inversion characters of the fault structure .

本文根据地震波视速度和偏振特性，导出波场分离矩阵是视慢度p和波速Vp、Vs的函数。

By applying seismic apparent velocity and polarization property in derivation , we come to the conclusion that the wave field separation matrix is the function of apparent slowness p , wave velocities Vp and Vs.

针对这两种层析技术的优缺点，采取多参数（波速、吸收系数）综合地震层析成像的方法，使波速CT与吸收CT两者能相互印证、互为补充。

According to the advantage and disadvantage of the two seismic tomography technology , we could take multiparameter integrate seismic tomography imaging method to confirm and makeup the the velocity CT and the absorption CT each other .

利用WD的这些特性，可以对测井信号进行子波分离和波速估计。

These properties can be used to estimate wave velocity and to separate wavelet from well-logging signal .

为了检测码头高压注浆加固处理效果，采用弹性波CT方法并结合岩芯波速测试及强度试验对其进行检测。

In order to detect the reinforcement effectiveness of the port by underwater high-pressure grouting , the elastic wave CT technique , and detection of wave velocity and point loading strength of the rock core specimens are adopted .

为了研究地下水和地震波之间的关系，设计了一套水位实验装置，用注水方法研究了多孔介质中水位变化对P波和S波的波速、波形和波谱的影响。

In order to study relation between groundwater and seismic wave , a set of water level test device is designed and the influence of variation in water level on velocity , waveform and spectrum in porous medium using water injection is studied .

结果表明，如果至少能在一种介质中存在Rayleigh波，且其波速小于两种介质中的最小极限速度，则滑移脉冲波就可以存在。

It is found that the slip pulse may exist if the Rayleigh wave arises at least in one medium with a speed below the minimum limiting speed of two media .

研究表明，Timoshenko梁在移动荷载作用下的临界速度取决于梁的波速和半空间波速的相对关系；

It is found that the critical velocities of moving load on Timoshenko beam depend on the relative relation of wave speeds in beam and those in half-space .

同时，由PS测井所得到的土层及强、中、弱风化层的纵横波速还可对面波和折射波勘探中风化层位的划分起标定作用。

Meanwhile , the velocities of P-wave and S-wave gained by PS-wave logging from soil and severe , middling and mild weathering strata may take very important role in weathering demarcation for Rayleigh wave and refraction wave explorations .

该方法利用海杂波图像的波浪纹理特征，通过对船载雷达的时序图像执行Radon变换，获取了波向、波速、波长和波周期的波浪参数。

First , the textural feature of radar sea clutter images are transferred by Radon transform to retrieve wave parameters , which are ocean wave direction , wave length , velocity and period from radar image series .

根据1975年1月至1993年12月发生的3级以上416次天然地震近震首波Pn走时数据，分析了山东及邻区上地幔波速各向异性的特征。

Based on Pn travel time from 416 nature earthquakes of their scale Ms > 3 happened from January 1975 to December 1993 , wave velocity anisotropy of the upper mantle is analyzed with residual calculation method .

弹性半空-理想流体层中Stoneley波具有频散性，且其波速小于弹性半空间中Rayleigh波的波速。

And ( 2 ) the Stoneley wave in elastic half-infinite solid-ideal fluid layer is dispersive , with a velocity less than that of the Rayleigh wave in elastic half-space .

本文建立了低切滤波器截止频率f0、阶次n与地层波速V、可分辨地层最小厚度Δh及地层吸收衰减系数A的关系。

This paper has set up a relation among cut off frequency f 0 , order n of LCF and wave velocity V , the minimum resolvable thickness Δ h , and the absorption and attenuation factor A of Earth 's strata .

通过波动方程的特征理论，利用点源产生的反射数据和透射数据，建立了同时反演密度ρ（z）和波速c（z）的封闭积分系统。

The inversion input information is the reflection and transmission data corresponding to a point source . By applying the characteristic theory for hyperbolic equations , we establish an integral system from which ρ( z ) and c ( z ) can be recovered simultaneously .

数值结果表明该方法对于降低圆形阵列天线旁瓣是十分有效的。文中还通过数值例子说明了特征矢量综合法在自适应数字波速形成（DBF）算法中的应用效果。

Numerical results show that it is efficient to reduce the sidelobe level of circular array antenna and application examples of the new synthesis technique in adaptive DBF are also presented .

50岁以上正常人的F-V曲线形状和切线时间常数特性及其形成的波速机理

Characteristics of F V Curve Configuration and Its Tangent Time Constants and Its Wave Speed Mechanism in Normal Humans above 50 Years Old

覆盖层平均波速的结果计算与频率–波数法的分析结果几乎完全相同，但频率–波数法对上部20m土层只得到一平均波速。

The average velocity obtained by SAC method and frequency wave-number method ( F-K ) is almost the same . However , F-K method only gives an average velocity for the upper 20-meter layer .

韧性剪切带中片麻岩和超高压榴辉岩变形特征及其与地震波速各向异性的关系：来自中国大陆科学钻探（CCSD）680～1200米岩心的证据

Deformation features of gneiss and UHP eclogite from ductile shear zone and its relation with seismic velocity anisotropy : Evidences from core samples at depth of 680 ~ 1200m of CCSD