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- mass attenuation coefficient 质量衰减系数
- mass attenuation coefficients 质量衰减系数
- Attenuation Coefficient The rate at which average power decreases with distance. 衰减系数平均功率随距离的延长而降低的比率。
- Objective: Study the influence of parameters such as attenuation coefficient, velocity of sound, and temperature of medium on focusing sound field. 目的:研究声衰减系数、声速、温度等媒质参数对声聚焦的影响。
- The attenuation coefficient shows approximately linear behaviour with frequency over the frequency range used,and the attenuation slope increases with the void content. 结果表明:超声衰减系数与频率之间存在线性关系,而且其斜率随孔隙率的增大而增大。
- Expound the component, the principle and the working process ofthe material attenuation measure device, give the attenuation coefficient calculation method. 阐述了材料衰减测试系统的组成、原理及工作过程，给出了衰减系数的计算方法。
- Abstract: Expound the component, the principle and the working process ofthe material attenuation measure device, give the attenuation coefficient calculation method. 文摘:阐述了材料衰减测试系统的组成、原理及工作过程，给出了衰减系数的计算方法。
- Abstract: The relation between the line attenuation coefficient and the material thickness of FTO has been studied, and the function between them has been given. 摘 要： 用数值模拟的方法研究了FTO客体材料的线吸收系数随着穿透材料深度的变化关系，并拟合出材料有效线吸收系数与厚度之间的函数表达式。
- Point and spot lighting usually have attenuation coefficients. 点光源、聚光灯通常具有衰减系数。
- The attenuation coefficient of the dominant mode is less than 1 dB/m when the dielectric material is polyimide and the depth is 0.05 mm,which is far less than that of the same bore diameter metal circle waveguide for THz radiation. 得出其主模在THz频段的衰减常数小于1 dB/m,该值远小于相同内径的金属圆波导在这一频段的衰减常数。
- This paper introduces an algorithm for retrieval of euphotic depth and digs out the relationship between the euphotic depth and the diffuse attenuation coefficient Kd(490) of the South China Sea based on in situ measurement data:zeu=2.784/Kd(490). 介绍了真光层深度的遥感反演算法;并根据实测资料;通过经验拟合得到南海海水真光层深度与海水漫衰减系数Kd(490)的关系:zeu=2.;784/Kd(490)。
- Acoustic characteristic parameters of living beings organization are as follows, mainly Sound of spread speed, sound of reactance, attenuation coefficient, sound of scattering and some non-linear parameters. 生物组织声学特征参量主要有：声传播速度、声阻抗、声衰减系数、声散射及一些非线性参数。 由于有些组织的病理变化不能仅仅从某一声学参数的大致变化来区分，组织声学参数的定量研究受到众多科研工作者的重视，特别是组织声速、声衰减系数的测量，通过测量声衰减系数可以区分B型成像仪上诊断不出来的病灶。
- Conclusion The way in diagnosis of fatty liver by uses of echo intensity histograms to calculate the attenuation coefficient is of clinical value and a kind of objective and simple method. 结论运用超声直方图计算衰减系数来诊断脂肪肝是一种客观、简便的方法。
- Methods The study make use of echo intensity histograms to calculate the attenuation coefficient,samples were taken from different depth of the liver and 53 patients were enrolled. 方法运用超声直方图测量53名患者同一切面不同深度的肝组织回声的灰阶值,并计算出衰减系数,按超声常规检查是否有脂肪肝和血甘油三酯是否正常分组,对各组的衰减系数进行对照分析。
- Many empirical regression relationships between the concentration of DOC and the diffuse attenuation coefficient, the euphotic depth (1% of surface irradiance) were found in many studies. 光衰减系数与溶解性有机碳(DOC)、有色可溶性有机物(CDOM)一般呈显著性正相关；
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- The propagation of Gauss laser beam in different kinds of water is measured, and based on the measured data, the effect of optical attenuation coefficient on beam propagation is analyzed. 摘要对高斯光束在不同水体中的传输特性进行了初步实验研究，分析了水体衰减系数对传输特性的影响。
- Price's index showed that the attenuating coefficient of the citation was in line with the law of attenuation in natural science references. 引文衰减系数符合自然科学领域文献老化规律。
- The mass rally was a total fiasco. 那次群众集会彻底失败。
- Let's collect the sap before its consolidation into a hard mass. 让我们在树液坚固成团之前将之收集起来。
