Attenuation of wave amplitude of reservoir rock at simulated high temperature and pressure is measured with spectrum-amplitude comparison mediod in laboratory.
在实验室内用频谱振幅比较法模拟测试了储集层岩石在高温高压下的弹性波振幅衰减值。
The technique makes use of dual energy X-ray imaging, where overlapping tissue signals can be isolated and quantified by exploiting the change in X-ray attenuation at different energies.
这项技术通过双能X-射线成像，重叠的组织信号可以被隔离，并利用不同能量的X射线的改变衰减量化。
Based on the observed data of strong motion acceleration in Yunnan region, the surface attenuation pattern at horizontal and vertical peak acceleration is studied by regressive analyzing method.
根据云南地区的实测强震加速度资料，采用回归分析法研究了云南地区的地面水平、垂直峰值加速度衰减规律。
The acoustical properties and specific heat of sample at low temperatures were studied, and the temperature dependences of modulus, sound attenuation and specific heat were obtained.
对其低温的声学和比热容性质进行了研究，得到了样品模量和声衰减以及随温度变化的规律。
At the same time, frequency dependence of scattering attenuation and anisotropic velocity variation makes fracture size deduction from seismic data.
与此同时，各向异性介质中散射衰减及速度随频率的变化，也为通过地震数据分析预测裂隙大小尺度提供了可能性。
The attenuation of electromagnetic waves at an arbitrary angle of incidence by a nonuniform unmagnetized plasma is given by using WKB method.
给出了用WKB方法计算以任意角入射的电磁波在不均匀等离子体中的衰减。
The results illustrate that the wave attenuation is stronger at higher plasma density.
研究发现，等离子体的自由电子密度越高，电磁波的能量衰减越快。
The effects on the underwater sound attenuation by the thickness and concentration gradient of polymers were measured in a sound tube at different frequency during the polymers dissolution process.
文中详细研究了梯度高分子溶液在不同频率下，聚合物厚度及梯度结构的变化对反射声衰减效果的影响。
The ground reflection and attenuation must be properly accounted for in order to use the source spectrum measured at the site of the observer to predict the actual source spectrum in the free field.
为利用观察点处实测声频谱来预估实际声源自由场频谱特性，必须适当地计及地面反射和衰减效应的影响。
An empirical formula was derived, which indicated the attenuation of the seismic waves at different distances along the vertical, horizontal and horizontal tangential directions.
笔者提出了沿垂直方向、水平径向和水平切向振动时不同距离地震波衰减规律的经验公式。
Considering the effect of multiple scattering, the rain induced attenuation at millimeter wave frequencies was simulated numerically.
在考虑多重散射效应的情况下，数值模拟了毫米波段的降雨衰减。
The attenuation coefficient is determined to at least partially compensate for the target Angle heel effect.
所述衰减系数被确定以至少部分补偿所述靶角度足跟效应。
The closed back purge system and the condition of aerating turbulent flow can lighten the attenuation of membrane flux, at the same time, prevent the problem of nitrification inhibition.
通过密闭反冲洗系统、曝气紊流条件，可有效缓解膜通量的衰减，同时防止反应器内硝化抑制作用的产生。
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 initial cavity, ballistic trajectory and velocity attenuation of the sphere pellets are similar at different water-entry angles and initial velocities.
在一定的入水角与速度范围内，球形弹丸入水初期弹道的空泡特性、弹道轨迹以及速度衰减规律具有一定的相似性。
After ultraviolet irradiation, the fiber attenuation increases obviously at several absorption peaks, whereas the value in low absorption region remains almost no change.
此光纤经紫外辐照后吸收峰处损耗明显增加，而低损耗区损耗几乎不变。
At low flow attenuation performance of semi-active muffler was computed respectively by using theoretical formula and three-dimension finite element method.
低速气流时，分别进行了半主动消声器的消声性能理论计算和三维有限元法数值计算。
The bandpass filter that has spurious suppression characteristics can solve this problem and it has excellent bandpass symmetry and stopband attenuation characteristics at high frequency.
具有杂波抑制特性的带通滤波器不仅可以实现这个功能，同时由于抑制了杂波还可以提高带通滤波器的通带对称性以及高端阻带的衰减特性。
In terms of the transmission of the radiation at the mediums, which following the Bougver laws of the index rules attenuation and the realistic measure…
根据辐射在介质中的传输是按指数规律衰减的波盖耳定律和实际测试情况，提出了规范的消光系数测试步骤和计算方法。
At first glance, the fluid attenuation of these lymph nodes could be mistaken for enlarged fluid filled small bowel loops.
粗看液性密度的淋巴结结节被误认为是扩大积液的小肠肠管。
The population drama increases at present, the resource attenuation, the environment worsening, already become three big difficult problems facing the rural area in the nowadays and agriculture.
目前人口的剧增，资源的衰减，环境的恶化，已成为当今农村和农业面临的三大难题。
Aiming at the attenuation of stress wave traveling through the rock joints, the influences of joint geometrical shape and stiffness on the stress wave transmission coefficient are analyzed.
针对应力波穿过节理面产生的衰减现象，研究节理面的几何形状、法向刚度对应力波的透射性影响。
At the same time , several filters are adopted in hardware circuits. The reception chip MC13135 with high gain is used to promote the capability of anti-attenuation of the interface .
同时，在硬件电路上采用多次滤波滤除噪声，采用高增益接收解调芯片MC13135对接收信号进行两次混频滤波，提取出微弱有用信号，进一步提高通信模块抗衰减能力。
At first glance the fluid attenuation of these lymph nodes could be mistaken for enlarged fluid filled small bowel loops.
粗看液性能度的淋巴结结节被误认为是扩大积液的小肠肠管。
It is demonstrated by theory and data observed in different time at same location that the attenuation coefficient of PAR is independent of the intensity of radiation.
海上同一站位不同时间的观测数据计算的PAR衰减系数相差很小，表明PAR的衰减系数是海水的光学性质，与辐射强度无关。
It is demonstrated by theory and data observed in different time at same location that the attenuation coefficient of PAR is independent of the intensity of radiation.
海上同一站位不同时间的观测数据计算的PAR衰减系数相差很小，表明PAR的衰减系数是海水的光学性质，与辐射强度无关。
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