查询词典 attenuation factor

Level lifetimes of ^131 Ce were determined by using the Doppler shift attenuation method.

大量的实验结果表明，N8的缺中子Ce(Z=58)同位素相对于γ形变是柔软的。

Therefore, in order to ensure the transmission quality, reliability and economical efficiency, we must master the rainfall attenuation influence of earth station setting areas accurately while the designing the earth-space satellite communication links.

因此，在设计地—空卫星通信线路时，为了保证通信系统传输质量、提高可靠性及经济性，就必须要准确地掌握地面站设置区域的降雨衰减所产生的影响。

Conventional meteorologic radar cannot distinguish radar reflectivity and specific attenuation of rain. There is some principled error to measuring rain by it. A new method on inversing rain rate distribution along Earth-Space path by radar-satellite system is presented in this paper.

一种改进气象雷达测雨性能的新方法胡大璋（中国电波传播研究所青岛研究中心，青岛266003）常规气象雷达无法分离雷达反射率和雨衰减率，因此用它测雨具有一些原理上的误差。

The relationships of pulse distortion depending on frequency, pulse width, rain rate and path length are studied .The conditions of the broadening and compression for pulse wave are given. Based on the scattering characteristics of fog, the attenuations and reflectivities at millimeter wave are computed and analyzed for radiation and advection fog. The attenuation along earth-space deduced by radiation and advection fog is obtained and the results are compared.

其次基于单个雾滴的散射特性，对毫米波段电磁波通过平流雾和辐射雾时产生的衰减效应特性和反射率进行了分析和讨论，通过分析预测雾衰减系数的常用经验模型，预测了毫米波段电磁波通过平流雾和辐射雾地空路径传播时的衰减特性。

Regions of lowest x-ray attenuation and high MR signal represent high water content in edematous non-hemorrhagic brain.

这在旋转－反射成像的图像中是最清楚的，但在T2加权GE像中也能观察到。

In this paper, the origin, propagation and attenuation of environmental vibration is studied by both test and theory method, so that we can evaluate and forecast the environmental vibration produced by elevated railroad traffic according to practice.

本文就高架轨道交通引起环境振动的发生机理及振动的传播和衰减规律进行实测及理论分析研究，以便对高架轨道交通引起环境振动进行切合实际的评价和预测。

The concept of attenuation ellipsoid is proposed.

提出了衰减椭球概念。

Further generalization gives out the concept of generalized attenuation ellipsoid and its application.

进一步推广，给出了广义衰减椭球概念及其应用。

Chapter 2 proposes the concept of attenuation ellipsoid.

在第2章首先利用散射参数提出衰减椭球的概念，并讨论其性质。

The exponential attenuation curve of the gain along the pulse propagation time is simulated.

分析了分幅相机增益衰减的理论模型，利用Mathematica软件模拟了增益随电脉冲传输时间指数衰减的曲线图。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。