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大地吸收
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  “大地吸收”译为未确定词的双语例句
     Analysis of attenuation by earth absorption.
     大地吸收衰减分析
短句来源
     The data processing techniques include QC(Quality Control) methods for amplitude, wavelet and high-frequency noise in 3D data processing, time frequency domain near surface and earth absorption and attenuation compensation method and anisotropy velocity analyzing method.
     处理技术包括:三维采集数据和处理过程中的振幅、子波及高频干扰的质量监控方法,时频域近地表和大地吸收衰减补偿方法以及各向异性速度分析方法。
短句来源
     But whether it can reach the prospecting aim by study for inversion of attenuation by earth absorption and by decreasing high frequency noise?
     但是否可以通过研究反演大地吸收衰减和减少采集的高频噪声达到勘探的目的呢 ?
短句来源
     It is well known that attenuation by earth absorption depends on character of stratum and directly effects on imaging resolution in seismic prospecting.
     众所周知 ,大地吸收衰减决定于地层的性质 ,并且大地吸收衰减直接影响地震勘探成像的分辨率。
短句来源
     It can be improved with development of seismic prospecting,but if attenuation by earth absorption wants to be fully removed,there is a long way to go.
     它将随着地震勘探的发展使之逐步提高 ,但要想完全消除大地吸收衰减 ,我们仍要走很长很长的路。
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  相似匹配句对
     Analysis of attenuation by earth absorption.
     大地吸收衰减分析
短句来源
     From the Stars to the Earth
     从星空到大地
短句来源
     K uptake by spring maize is significantly improved by potassium fertilizer and established the dynamic model of N.
     K的吸收。 建立了N.
短句来源
     Rock & Roll Of the Earth
     大地摇滚
短句来源
     c)The efficiency of absorbing.
     c)吸收效率;
短句来源
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  ground absorption
The effects of the surface (ground) absorption (measured by β) and the terminal velocity (w) present an alternative explanation other than considering the variable eddy diffusivities and the change of the wind with height.
      
Note that the reflection is of slightly lower amplitude due to the ground absorption and the longer propagation path taken by the reflected energy.
      


The use of vibrator array,longer total sweep time and correla- tion technique is both an efficacious method for ameliorating the signal-to-noise ratio of seismic data and a key to the successful use of seismic vibrator. In addition,the measures helpful to improving the quality of seismic vibrator data are: ·to raise the output force of vibrator; ·to expand the frequency band for generating seismic signals; ·to enhance high-frequency signals but to reduce the reflection dynamic range as well as the influence...

The use of vibrator array,longer total sweep time and correla- tion technique is both an efficacious method for ameliorating the signal-to-noise ratio of seismic data and a key to the successful use of seismic vibrator. In addition,the measures helpful to improving the quality of seismic vibrator data are: ·to raise the output force of vibrator; ·to expand the frequency band for generating seismic signals; ·to enhance high-frequency signals but to reduce the reflection dynamic range as well as the influence of direct and surface waves by making use of amplitude control method; ·to compensate earth absorption by adopting nonlinear sweep and the array; ·to weaken the noises incurred by vibrator,such as various non- linear distortions and phase distortion. A detailed theoretical analysis of both the significance and neces- sity of using these measures is given.

采用数台可控震源组合,增加扫描的总时间和利用相关技术是提高可控震源地震资料信噪比的有效方法,也是可控震源取得成功的关键。此外,提高可控震源的输出作用力,扩展激发地震信号的频带,用振幅控制的方法增强高频信号的能量并减少反射波的动态范围和减小直达波、面波的干扰,用非线性扫描和组合补偿大地的吸收作用,减少在激发地震信号的同时而产生的噪音,例如各种类型的非线性畸变和相位畸变,所有这些方法都是改善可控震源地震资料质量的不可忽视的手段。本文从理论上详细地分析了应用这些方法的意义和必要性。

In view of the fact that seismic amplitude attenuation varies with the absorp-tion of different frequency contents, and based on wavelet transform theory, we put forward a new processing method for compensating spherical divergence and ab-sorption in the time -frequency domain. The method includes the following points:Absorption factor is decomposed into surface-consistent absorption compo-nent and earth absorption component by analysing the geophysical mechanism of amplitude attenuation.Seismic record is decomposed...

In view of the fact that seismic amplitude attenuation varies with the absorp-tion of different frequency contents, and based on wavelet transform theory, we put forward a new processing method for compensating spherical divergence and ab-sorption in the time -frequency domain. The method includes the following points:Absorption factor is decomposed into surface-consistent absorption compo-nent and earth absorption component by analysing the geophysical mechanism of amplitude attenuation.Seismic record is decomposed into different frequency traces by using the characteristic of wavelet decomposition.Low-frequency energy absorption curve that varies with time and offset is drawn to compensate its corresponding frequency trace.Each frequency trace is then converted into the selsmic record that has un-dergone compensation, removing the negative influence of earth absorption upon seismic amplitude.Surface-consistent absorption can be eliminated in the late processing steps such as surface-consistent deconvolution.Theoretical and practical results indicate that the method can compensate quite de-sirably the amplitude attenuation due to spherical divergence and earth absorption.

根据地震波振幅衰减随不同的频率成分有不同的吸收衰减特点,本文基于小波变换理论,提出了时频域球面发散和吸收补偿的处理方法。首先分析了振幅衰减的物理机制,将吸收因子分解为地表一致性吸收项和大地吸收项。然后利用小波分解的特性将地震记录分解成不同的频道(尺度),拟合出各个频道随时间和炮检距变化的低频吸收能量曲线,对相应的频道进行补偿,再将各个频道重构为经过补偿后的地震记录,以消除大地吸收项对振幅的影响。而地表一致性吸收项留待后续处理去解决,如地表一致性及褶积。经过理论试算和实际处理表明,本方法能较好地消除球面发散和大地吸收对振幅的影响。

During the seismic data acquisition,the high frequency component of the deep reflected wave is seriously attenuated because of the absorption effect of the earth.The performance range is decreased.The resolution and effective depth are affected.The spectrum shaping technology is applied to acquisition system of telemetric seismic instruments.It makes that the preamplifiers gain is increased at 6 dB/oct ratio with increasing in signal frequency,and makes compensation for high frequency lossed due to earth attenuation....

During the seismic data acquisition,the high frequency component of the deep reflected wave is seriously attenuated because of the absorption effect of the earth.The performance range is decreased.The resolution and effective depth are affected.The spectrum shaping technology is applied to acquisition system of telemetric seismic instruments.It makes that the preamplifiers gain is increased at 6 dB/oct ratio with increasing in signal frequency,and makes compensation for high frequency lossed due to earth attenuation.

遥测数字地震仪 I/O系统 ( )的采集系统中采用了频谱整形技术 ,这一技术使采集站前放增益随信号频率升高 ,以 6 d B/oct的速率递增 ,从而补偿了因大地吸收效应造成的高频损耗。文章介绍了频谱整形技术在采集系统中的应用

 
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