查询词典 attenuation factor

Based on those above, the paper discusses the importance of energy in solving nonlinear wave-motion problems, which is processed from four aspects: formation of hypocenter and shock wave, energy distribution on the interface, energy attenuation in the media, and interact among waves.

通过上述认识，提出了非线性波动问题中能量的重要性，然后分别从震源与冲击波的形成，界面处的能量分配，介质中能量的衰减，波的相互作用四个方面讨论了非线性波的能量问题。

In this paper the key points discussed were that, under the condition of a sharp hypsography of desert areas of Ordos basin, we used some new geophysical methods in the investigation of surface structure to obtain high accurate surface structure data and provide reliable scientific foundation for data acquisition and process; we dealt with the optimum coupling of surface geophones and the digital realization technique in desert areas, dug into a method of high frequency compensation according to attenuations by absorption near surface, adopted data processing and correction technique, solved high frequency attenuation and geophone coupling, eliminated the influences of sharply transverse fluctuation of hypsography in desert area on the seismic data, enhanced the fidelity and SNR of seismic section, and finally picked up more geologic information on the seismic profile and improved the precision of the lateral prediction for the reservoir beds.

本文旨在研究鄂尔多斯盆地沙漠区地表变化比较大的情况下，在表层结构调查中通过应用一些地球物理新方法，以获取高精度的表层结构数据，为资料采集和数据处理提供更科学的依据；研究在沙漠区地表检波器最佳耦合的方式与数字实现技术，研究通过近地表的吸收衰减规律进行高频补偿的方法，采用数据处理校正技术，解决高频吸收及检波器耦合，消除沙漠区表层横向剧烈变化对地震资料的影响，提高地震剖面的保真度和信噪比，从而使更多的地质信息能够从地震剖面中反映出来，提高储层横向预测的精度。

The result from model show ice layer growth speed axial attenuation is larger than radial.

模拟的结果表明冰层生长速度随时间衰减的幅度轴向大于径向。

Infrasound (0.0001-20Hz) is acoustic energy with characters of little attenuation and long distance during radiation, inaudibility, diffraction and resonance in some parameters.

次声波是频率为0.0001Hz-20Hz的声波，具有传播衰减小、传播距离远、易于衍射、一般听不到、达到一定参数可引发共振等特点。

HST is characterized by siliceous limestone-bearing calcareous gravity current sediments, which have the sequences of increased, and incrassate limestone and decreasing and attenuation siliceous rock upwards.

其中孤台层序发育主要受控于相对海平面变化和碳酸盐生产率，台盆层序发育则受构造活动、海平面变化、台缘重力流等因素的综合影响，具多物源特点。

Based on the current linear attenuation model and the idea of minimum arcing voltage in inductive intrinsically safe circuit , the authors establish the principle for choosing L/R ratio assuredly by using the intrinsic safety discriminant of inductive circuit and express the discharge time with known circuit parameters.

基于电感性本质安全电路放电电流线性衰减模型，引入最小建弧电压的概念，得到了放电时间不含未知参数的表达式，利用电感电路的本质安全性能判别式，确定了电感电阻比 L/R的选取原

First the article elaborated the inelasticity and the hysteresis of original accountant supervision system in the day which the market economy flourishes more and more. The surveillance function attenuation is unable to guarantee the market economy the healthy development.

首先论述了市场经济日益发展的今天，原有会计监督制度的不适应性和滞后性，监督职能的弱化无法保证市场经济的健康发展。

Making use of states transformation, states feedback and the disturbance redefinition, this paper defines linear systems sliding mode disturbance attenuation problem Q 2, which can be resolved by solving Riccati inequation.

通过状态变换和状态反馈以及干扰重定义，提出了线性系统的滑模干扰抑制问题Q2。问题Q2 可以通过解Riccati不等式得以解决。

The diffraction attenuation of infinite thin sound barriers to point sources are calculated,and the influences of Sound source and receiver positions,noise frequency and reflection from the ground are ana- lyzed.

数值模拟方法主要借助于计算机计算，不受实地条件的影响，因而能快速得出分析结果，为声屏障的设计提供参考依据，以便探讨和设计更多的高效声屏障形式。

The main reason is that the condition ismore complicated in open field,and measuring result is much more easily influenced bysome kinds of clutters,like atmosphere attenuation,cloud or fog,the fluctuating of scaleobject and ground clutter and so on.So these factors should be taken into account inpractical measuring,and make some amending processing.

主要原因是外场中情况复杂，测量结果受各种杂波影响较大，如大气衰减、云或雾、定标金属球的波动、地面杂波等，因此在实际测量中应考虑这些因素，并做出相应的修正处理。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。