attenuation的例句大全

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）。

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.

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。

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

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。

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。

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。

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。

The dissipative attenuation Mechanism of the Mn-Zn ferrite that involved the natural resonance, the piezoelectric resonance and the magnetic hysteresis loss are also studied.

本文还分析了锰锌铁氧体自然共振、磁滞损耗和畴壁共振等磁极化机制衰减吸收电磁波的各种机理。

Theoretical calculation of cutoff wavelength and attenuation constant in elliptic waveguides

椭圆波导的截止波长和衰减常数的理论计算

Cube strength of concrete increase with the curing period showed a slight increase in late strength without significant attenuation. 2.

混凝土的立方体强度随着养护龄期的增长呈现小幅度增长，后期强度没有出现明显的衰减。

By utilizing the matching method of regional electromagnetic field for individual regions, the electromagnetic field distribution in the space of three respective regions is found. And the dispersion equation, coupled impedance and attenuation constant are thence obtained.

利用电磁场分区匹配方法求解了空间电磁场分布，从而导出了色散方程、耦合阻抗和衰减常数的计算公式。

The attenuation correction coefficient influences correction quantity and correctable thickness.

衰减订正系数影响订正量的大小和可订正厚度。

This method overcomes the difficult and unrealizable experiment conditions that are used to measure the absolute attenuation coefficient and impels the technique of ultrasonic characterization to be more closed to the engineering requirements and more practical.

该方法克服了绝对衰减系数测定法对实验条件要求极为苛刻、难以实现的不足，使得超声表征技术更接近工程条件、更具实用价值。

The anti-irradiation cover glass can resist various particles existing in space and battery capacity attenuation.

片薄薄 抗 辐照玻璃盖片既抗环境种粒,又效性衰减.

This paper mainly introduced the process of natural attenuation of zinc in soils from the effects of major factors including soil temperature, moisture, pH, organic matter, amendable and organic materials, chemical fertilizers, cultivating plants, etc.

从影响土壤锌自然消减的因素方面，阐述了锌自然消减的研究进展。土壤锌自然消减受温度、水分、pH值、有机质、改良剂、化学肥料、栽培植物等因素的影响。

Q value of anelastic S-wave attenuation in Yunnan region

云南地区S波非弹性衰减Q值研究

Anelastic structure and evolution of the continental crust and upper mantle from seismic surface wave attenuation

根据地震面波衰减讨论大陆地壳与上地幔的滞弹性结构和演化

When the radius or half of larger side is ten times larger than the free-space wavelength, attenuation rate is very low and hardly related to the shape of cross sections, and only related slightly to the area of cross section of tunnel.

当隧道半径或长边长的一半大于波长10倍以上时，电磁波的衰减率很小，几乎与横截面形状无关，仅仅与隧道横截面积的大小有微弱的关系。

Point and spot lighting usually have attenuation coefficients.

点光源、聚光灯通常具有衰减系数.