衰减

And at the same time, through discussing the mechanism of earth wave absorbing tomography, it is known the CT of seismic absorption imaging method is better than the wave velocity imaging method in the identify ability of faultage crushed zone whose body structural plane is flabbiness and the dimensions is small.

阐述了地震波在粘弹性介质传播过程中具有的衰减特性，探讨了地震波吸收层析成像的机理，得知地震吸收CT成像方法，对岩体软弱结构面、裂隙和规模较小的断层破碎带的识别能力，要强于波速成像方法。

Seismic tomography is used to study the 3-D seismic velocity structure andattenuation structure of earth by the seismic wave information obtained from a largenumber of passive earthquakes and artificial earthquakes.

地震层析成像是一项通过综合大量天然震源或人工源激发的地震波信息来研究三维地震速度图象或地球衰减结构图象的技术。

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 main parts of the thesis include:(1) Oxidative characteristics of new electrodeless discharge lamp: The microwave power output, spectrum of MWL, extinction of lights in dye solution and production of hydroxyl radical and ozone (O3) are studied in detail.

实验主要内容如下：(1)微波无极紫外灯的光氧化性能：考察了微波最大利用率、光源的发射光谱、光线在水中的衰减、产生·OH和O3的规律。

The plasma concentration of remifentanil required to produce electroencephalographic depression is reduced by 50% when comparing a young patient with an older patient.

在年轻患者和老年患者所产生的脑电图记录衰减变化对比中，雷米芬太尼的血浆浓度的需求减少50％。

The damping circuit may already be built into the electrometer or may be an external circuit.

衰减电路可以装在静电计的内部，也可以是一个外部电路。

Refer to the instrument's instruction manual for information on a particular electrometer's internal damping feature.

关于特定静电计内部衰减电路的性能，请参阅该仪器的操作手册。

The electron trap energy level structureand the process on the temporal behavior of photoelectrons are separately investigated bythermo-luminescence and microwave absorption dielectric spectrometry.

采用热释光谱和微波吸收介电谱对其电子陷阱及其光电子衰减过程进行了系统的研究。

The constant of electrostatic charge decay time is an important physical quantity that can describe the electrostatics property of materials.

0引言静电衰减时间常数是衡量防静电材料性能的重要物理量，对其的测量对于防治静电危害是十分重要的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。