attenuation的例句大全

The echoes of GPR ( Ground Penetrating Radar) are more and more dissipative attenuation with the increase of the depth of detection in GPR so that it is more difficult of deep detection at same time the decreased resolution.

探地雷达回波因为地下介质的损耗造成其随着深度的增加而衰减增大，导致对深埋目标探测更加困难，分辨率因此而降低。

Based on analyzing the observed data of long term operation, the attenuation law of yields and the control effect of each affecting factor are found out for dug well with infiltration pipes arranged radiantly in river bed after long term operation.

通过对长期运行观测资料的分析，查明了河床辐射井长期运行出水量的衰减变化规律及其影响因素所起的相应控制作用。

Wave attenuation properties of rectangular pontoon breakwater were analyzed with eigen-function expansion.

利用特征函数法对矩形浮箱式防浪堤的消浪性能进行分析。

Objective; To compare the dependence of signal attenuation on temperature and time caused by the diffusion movements in inhomogeneous and linear gradient magnetic field.

目的：比较非理想均匀磁场和线性梯度磁场中扩散运动引起的信号衰减对温度、时间的依赖性。

To compare the dependence of diffused attenuation on temperature and time in inhomogeneous and linear gradient magnetic field

非理想均匀磁场和线性梯度磁场中扩散衰减对温度和时间依赖性的比较

The notching circuit made of this kind of twin T network can increase the attenuation slop outside the pass-band but decrease signal loss within pass-band.

采用这种双T网络做成的陷波电路，可使通带外的频带衰减陡度增大，而通带内的有效信号损失减小。

Comparing to conventional E-plane waveguide filter, great improvments have been made in stop-band attenuation of a BPF.

为了提高E面全金属膜片矩形波导滤波器的阻带性能, 本文对滤波器的结构做了改进,采用了混合膜片的形式.

Methods 60 elderly healthy men were divided into three groups, 20 with normal bone density ( Group A), 20 with osteopenia ( Group B) and 20 with osteoporosis ( Group C), according to broadband ultrasound attenuation ( BUA).

方法60例健康老年男性按照宽波段超声衰减（BUA）值分成骨量正常组（A组）、骨量减少组（B组）和骨质疏松组（C组）。

Evaluating the density of cancellous bone using quantitative ultrasound, it's a theory developed for more than ten years in the field of Ultrasonic Diagnosis Technic, broadband ultrasound attenuation ( BUA) and speed of sound ( SOS) are two pivotal parameters of the QUS diagnosis.

在超声诊断技术领域，定量超声骨密度检测理论已发展了十余年，宽带超声衰减（BUA）和超声声速（SOS）是用定量超声（QUS）进行骨质疏松症诊断的最重要的两项参数。

Results The values of calcaneal broadband ultrasound attenuation ( BUA), speed of sound ( SOS) and stiffness ( STI) in altitude group were significantly lower than those in plain group at any age ( P < 0.01).

结果进驻高原地区官兵跟骨超声振幅衰减（BUA）、超声声速（SOS）和刚度（STI）各年龄段均较返回平原组显著降低（P<0.01）。

The broadband ultrasonic attenuation ( BUA) of proximal femurs, fat-free dry weight and ash weight of the femur of the rat model were measured by quantitative ultrasound.

同时用定量超声检测大鼠股骨近端超声振幅衰减（BUA）及大鼠股骨骨干重和骨灰重。

Methods An ARM embedded system was used to measure the speed of ultrasound, the broadband ultrasound attenuation ( BUA) and the stiffness.

方法：设计采用ARM嵌入式系统，通过超声技术测量并计算足跟骨处的超声速度、宽带超声衰减值和硬度系数。

Infrasound existing widely in nature has already aroused the interests of environmental and military scientists in many countries for its characters of less attenuation during propagation, inaudibility and broad harm in some cases.

次声广泛存在于自然界中，由于其在传播时不易衰减，不能被听到等特点，在一定作用条件下，可造成危害，已引起一些国家的环境科学家和军事科学家的关注。

In the end, we also talk about the development trend of techniques for noise attenuation.

最后还简述了去噪技术的应用及发展情况.

The airflow noise attenuation capacity of the increasing thickness , decreasing pore diameter increasing airflow velocity.

材料厚度越大 、 孔径越小、气流速度越大,多孔铝合金的防风降噪性能越好.

Therefore, there is a perfect compromise between attenuation in stopband and group delay or loss variation in passband.

因此，它在带外衰减与带内幅度特性和带内群时延特性之间有了一个较好的折中。

Study of the Smokeless Propellent with Small Microwave Attenuation

对微波衰减小的无烟推进剂的研究

The higher the elevation of atmospheric layer, the less the optical propagational attenuation in the air.

激光传输在海拔较高的大气分层中受到的衰减比海拔低的层段小；

Discussion on the curriculum of sports dance in university by comparing the social dancing and competition sports danc Shock Attenuation and Kinematics Analysis in Normal Walking of the Different Social Dancing Exercisers

从体育舞蹈的分类探讨其高校教学内容必须两手抓不同舞姿练习者走路震荡传导和运动学特征的比较研究

However, no report is available about the effects of tree parameters on noise attenuation of expressway.

然而, 针对高速公路绿化带种植树种、种植密度、林带宽度等多种因素对降噪效果影响的研究尚属空白.