The viscosity coefficient of pore fluid in saturated sandstone has an obvious effect on the attenuation, modulus, and velocity dispersion in low frequency range.
饱和砂岩中扎隙液体的粘滞系数对饱和砂岩的衰减、模量和速度色散的影响在较低频段是明显的。
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。
Ct usually demonstrates a high attenuation region surrounded by a halo of abnormally low attenuation, consistent with acute hemorrhage and secondary edema, respectively.
CT上经常显示一个高信号衰减区外周围绕一圈低信号衰减光晕，这种影像与相应的出血和继发性水肿是相一致的。
Improving measurement accuracy of low level signal is studied using RF attenuation, resolution bandwidth, video bandwidth, and video average.
研究了利用频谱仪射频衰减、分辨带宽、视频带宽和视频平均的方法，提高和改善低电平信号的测量精度。
The results show that the velocity and the relaxation peak of the attenuation moved to low frequencies, and the amplitude of the attenuation decreases, as the correlation length increases.
结果表明，当相关长度增大时，相速度的过渡带向低频方向移动，衰减的弛豫峰随相关长度的增大向低频方向移动，且幅度逐渐减小。
We also found that attenuation of backlash and collapse vibration wave are more rapid than the backlash and blasting vibration wave for the low velocity trait of them.
爆破振动衰减较快，而后座和塌落振动因其低频特性衰减相对较慢。
With the features of super brightness, low attenuation, high reliability, good consistency, and high weather ability.
超高亮、低衰减、高可靠性、一致性好、高耐候性；
Through this paper, the low-voltage power line network and channel characteristics are researched. The noise and attenuation characteristics of power line channel are measured and analyzed.
本文首先分析了低压电力线网络的特点及信道特性，对电力线信道的噪声和复衰减特性分别进行了测量及分析。
The threshold pressure gradient of low permeability sandstone was studied experimentally by measuring the pressure attenuation in an unsteady seepage flow.
为了研究低渗透砂岩的启动压力梯度，设计了一种非稳态渗流中测量压力的试验方法。
Experimental research reveals that the axial and lateral creep curves of shale specimens behave the attenuation creep stage under relatively low stress state.
试验表明，页岩在较低应力水平下，轴向及侧向蠕变曲线呈现出衰减阶段的流变特性。
The serial product features include wide frequency band, low VSWR, high attenuation accuracy, small dimensions, high power, excellent capacity in anti-burnout etc.
该系列产品具有频率范围宽、驻波系数低、衰减精度高、体积小、功率大、抗烧毁性能好等特点。
The attenuation factor of longitudinal wave was changing linearly, whereas the attenuation factor of the slow shear wave kept nearly constant with a low frequency on the exploration seismic band.
纵波的衰减系数在地震频带内基本上呈线性变化，而横波的衰减系数在地震频带内除低频外基本保持稳定。
The optical fiber communication technique is well suited to a large delay time, due to the low attenuation and chromatic dispersion of the fiber, and to its high bandwidth.
通信技术中使用的光纤，由于其低耗与宽带特性，能较好地满足这种要求。
In low field range, the change of current with time can be simulated by attenuation of power index, and the attenuation coefficient intends to decline with the increase of the applied electric field.
在低场范围中，电流随时间的变化，可以是模拟的幂指数的衰减，并与所施加的电场的增加的衰减系数拟下降。
Small solid solder joint, electrical conductivity, and no signal attenuation, when subjected to high temperature and low temperature will not fall off.
焊点细小牢靠、导电性好、无讯号衰减，在经受高温和低温时不会脱落。
Figure 1: Axial non contrast CT demonstrates symmetric low attenuation in the temporal-parietal white matter. Note involvement of the splenium of the corpus callosum (red arrows).
图1：轴位的平扫ct显示对称性的低密度影在颞枕叶脑白质区，需要注意的是病变累及胼胝体的压部。
It is characterized by good frequency selectivity, low insertion loss and high attenuation of specified frequency.
它具有频率选择性好，通带插损低，对陷波频点抑制较高的优点。
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。
With contrast enhanced CT, nodes with enhancing rim and central low attenuation were shown in 44 nodal regions, all were proved pathologically as metastases (specificity, 100%).
增强CT扫描44个淋巴结区域显示淋巴结边缘强化伴中心低密度区，经病理证实全部为转移淋巴结，特异性为100％。
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。
The product is a new energy-saving lighting source, with the performance of high brightness, low attenuation, long lifetime and high reliability.
本产品是一种新型高功率节能光源，它具有亮度高、衰减小、寿命长、可靠性高等优点。
The invention relates to an improvement of a jacket tube in terms of inexpensive producibility and of suitability as a semi-finished product for optical fibers having a low optical attenuation.
该发明涉及的一件外衣管改善便宜的可生产性和适用性方面作为半成品光纤具有低衰减光纤产品。
Enhancing rim with central low attenuation is a reliable sign for diagnosing cervical lymph node metastases, in patients with known primary cancer.
如有原发肿瘤病史，淋巴结边缘强化伴中心坏死是诊断颈部淋巴结转移最可靠的征象。
The technique of active attenuation of noise is very effective for controlling the low frequency noise in ducts.
有源消声技术对于管道中低频噪声的控制非常有效。
Fiber Fabry-Perot sensor has the advantage of light mass, thin diameter, passive, electric insulating, anti electromagnetic interference and low attenuation.
光纤法珀传感器具有质轻径细、无源、电绝缘、抗电磁干扰、信号衰减小的优点。
By selecting the phosphor, silicon and mixture ratio, high-power white LED with high brightness and low attenuation is prepared, and the color rendering index (CRI) reaches 95.
通过甄选荧光粉、硅胶以及配比，制备出显色指数(CRI)为95的高亮度、低衰减的大功率白光led。
Figure 1: Axial CT enterographic image demonstrating enlarged mesenteric lymph nodes (green arrowheads) abnormal mesenteric nodes with low central attenuation (blue arrows).
肠道轴位显示扩大的肠系膜淋巴结肿大（绿箭头），异常的低密度肠系膜结节。
Figure 1: Axial CT enterographic image demonstrating enlarged mesenteric lymph nodes (green arrowheads) abnormal mesenteric nodes with low central attenuation (blue arrows).
肠道轴位显示扩大的肠系膜淋巴结肿大（绿箭头），异常的低密度肠系膜结节。
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