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subsurface media
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  地下介质
     RECONSTRUCTION OF THE DISTRIBUTION OF RELATIVE ATTENUATIONS IN SUBSURFACE MEDIA: A NEW TOMOGRAPHIC TECHNIQUE
     重建地下介质相对衰减的分布:新的成象方法
短句来源
     MECHANISM AND MODELS ON MIGRATION OF RADIONUCLIDES IN SUBSURFACE MEDIA
     放射性核素在地下介质中迁移机理与模型研究
短句来源
     Seismic exploration technique of multicomponent converted wave not only has many advantages of deeper prospecting depth, easier sampling and less investment for compressional wave, but also can reflect change in shear wave velocity of subsurface media.
     多分量转换波地震勘探既具有纵波勘探深度大、资料采集相对容易和投资少的特点 ,又能反映地下介质的横波速度变化。
短句来源
     This paper describes the outline of the subjects of present status and development of earthquake prediction,including the construction of seismograph observational networks,problems existing in earthquake prediction methods,new understanding and new theory of seismic phenomena,and the relation between earthquakes and geophysical character of subsurface media
     介绍了西太平洋地球物理会议概况,特别是地震预报现状和发展专题,包括地震观测台网建设,地震预报方法中存在的问题,对地震现象的新认识与新理论,地震与地下介质的地球物理性质的关系。
短句来源
     Study of the anisotropy of the subsurface media is a challenging task during exploration and development of oil and gas.
     在油气勘探和开发中,对地下介质各向异性的研究是个前沿课题.
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  “subsurface media”译为未确定词的双语例句
     Thoretical Study on the Effect of Subsurface Media on x Sighal in Phasor Induction Log
     井下介质对相量感应测井x信号影响的理论
短句来源
     The processed reflection seismic data can be used trace by trace for inversion of the vertical variation of acoutic impedance or velocities of the subsurface media.
     经过处理的反射地震数据,可以逐道地反演地下岩石的波阻抗或速度的垂向变化。 本文讨论应用一维声波方程反演法、广义线性反演和线性规划反演法的假设条件和由此产生的局限性,它们与反问题解的存在性有关。
短句来源
     In forward computation for seismic waves, subsurface media arc usually assumed to be completely clastic or acoustic.
     在地震波正演计算中,常假设地下介质是各向同性的理想弹性介质或声学介质,而实际介质通常是各向异性和非完全弹性的。
短句来源
     Theoretical Study on the Effect of Subsurface Media on x Signal in Phasor Induction Log.
     井下介质对相量感应测井 x 信号影响的理论.
短句来源
     17(2):85~89 A simple phasor inverse algorithm is proposed on the basis of systematic theoretical study on the effect of subsurface media on x signal in phasor induction log. With this simple phasor inverse algorithm,an exact phasor deconvolution is evolved.
     17(2):85~89对井下介质环境对相量感应测井 x 信号的影响进行了系统的理论考察,提出了一个简单的相量反演算法,以此为基础可发展严格的相量反褶积理论。
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     MEDIA
     媒体话题
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     Media
     媒体互动
短句来源
     MECHANISM AND MODELS ON MIGRATION OF RADIONUCLIDES IN SUBSURFACE MEDIA
     放射性核素在地下介质中迁移机理与模型研究
短句来源
     Phosphorous Removal by Different Media in Subsurface Flow Constructed Wetlands
     潜流人工湿地不同基质除磷研究
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  subsurface media
Model simulations provide information on the spatial and temporal distributions of contaminants in subsurface media but are difficult to apply to karst aquifers in which conduit flow is important.
      
Adsorption and Transport of Uranium(VI) in Subsurface Media
      
Water recharge from land surfaces into subsurface media is an essential element in the hydrologic cycle.
      
The preand post-implementation monitoring activities should also focus on subsurface media, most notably the shallow ground water.
      
The extent to which moisture penetrates and is stored in the subsurface will be determined by the porosity and permeability of subsurface media.
      
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The processed reflection seismic data can be used trace by trace for inversion of the vertical variation of acoutic impedance or velocities of the subsurface media. This paper deals with the limitations of the following inversion approaches of seismic traces namely,

经过处理的反射地震数据,可以逐道地反演地下岩石的波阻抗或速度的垂向变化。本文讨论应用一维声波方程反演法、广义线性反演和线性规划反演法的假设条件和由此产生的局限性,它们与反问题解的存在性有关。由于大地的滤波作用,检波器与大地的耦合和地震仪中滤波器的作用,地震记录与地面振动之间有很大的差别。在反演前对地震信号进行衰减补偿、频带展宽和相位改正等预处理,是提高反演效果的关键之一。

In traditional continuous wave EM tomography (CWEMT or EMT, for short), it is often difficult, even impossible, to determine the transmitting power factor K of the source, which is a main paramater for the solution of the linear system of equations. As a result, the application of EMT becomes greatly limited. In this paper, a new EMT is presented, the linear system of equations of which is independent of K and can therefore work well where even the traditional technique failed. The image reconstructed by using...

In traditional continuous wave EM tomography (CWEMT or EMT, for short), it is often difficult, even impossible, to determine the transmitting power factor K of the source, which is a main paramater for the solution of the linear system of equations. As a result, the application of EMT becomes greatly limited. In this paper, a new EMT is presented, the linear system of equations of which is independent of K and can therefore work well where even the traditional technique failed. The image reconstructed by using the new technique is 2-D distribution of the relative attenuations in subsurface media, the resolution and stability of which seems to be better and to be more favourable to geological interpretation than that of absolute attenuations reconstructed by using the traditional one. The new technique has successfully been used in data processing for underground EM w?.ve shadowing in eight different areas.

在传统的连续波电磁层析成象方法中,影响线性方程组的解的重要参量——波源的辐射功率因子k,常常难以确定或根本无法确定,使方法的应用受到严重限制.本文提出了新的电磁层析成象方法,其线性方程组与k无关,能用于传统方法无法应用的情况.新方法重建的地下介质相对衰减的二维分布图象,比传统方法重建的绝对衰减的二维分布图象具有更好的分辨力和稳定性,更有利于地质解释.新方法已成功应用于8个不同地区电波勘探资料的处理.

In forward computation for seismic waves, subsurface media arc usually assumed to be completely clastic or acoustic. However, the real rocks are occasionally of anisotropy and incomplete elasticity, The discussion in this paper will cover a series of parameters such sa the phase velocity, group velocity, energy velocity, polarization angle and quality factor of seismic body waves propagating in transversely isotropic viscoelastic media (TIVM) as well as the corresponding wave equation. Theoretical...

In forward computation for seismic waves, subsurface media arc usually assumed to be completely clastic or acoustic. However, the real rocks are occasionally of anisotropy and incomplete elasticity, The discussion in this paper will cover a series of parameters such sa the phase velocity, group velocity, energy velocity, polarization angle and quality factor of seismic body waves propagating in transversely isotropic viscoelastic media (TIVM) as well as the corresponding wave equation. Theoretical analysis and computational results show that the properties of seismic qavcs in TIVM are more distinctive and complicated than that in ideal media.

在地震波正演计算中,常假设地下介质是各向同性的理想弹性介质或声学介质,而实际介质通常是各向异性和非完全弹性的。本文将讨论在横向各向同性粘弹性介质(TIVM)中传播的地震波波动方程,地震体波的相速度、群速度、能速度、极化角和品质因子等性质。理论与计算结果都表明:各向异性粘弹性介质中的地震波特性比理想介质复杂,且有其独特的性质。

 
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