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layered earth     
相关语句
  层状大地
     A Fast Method for Calculating the Frequency-domain EM Response of a Finitely Long Grounded Wire over a Layered Earth
     层状大地有限长接地导线频域电磁响应的快速计算方法
短句来源
     The results of the forward on layered earth and 3-D geoelectric section, by choosing proper length of boundary, show that this method, contrasted with exact solution and FEM, is correct and feasible. The maximal relative error is less than 1%.
     分别以层状大地和三维地电断面为例与精确解和有限单元法的非齐次边界的解进行对比 ,结果显示 ,该方法正确、可行 ,计算相对误差小于 1 % .
短句来源
     A introduction is given in this paper to the TEM calculations using the Gaver-Stehfest Inverse Laplace transform method, the effect of ramp function turn--off on the TEM response of layered earth and calculation of apparent conductivity for coincident loop configuration.
     介绍了层状大地上水平共平面共心线框在阶跃函数或矩形脉冲激发时使用GaverStehfest算法计算互阻抗的方法以及斜坡函数断电效应的修正、给出了重叠回线装置时全时域视电阻率的计算方法和TEM资料的反演算法。
短句来源
     A NEW FORWARD METHOD OF TEM RESPO-NSE TO LAYERED EARTH
     一种层状大地瞬变电磁响应正演计算的改进方法
短句来源
     THE COMPUTATION OF DC RESISTIVITY SOUNDING CURVES ON HORIZONTAL LAYERED EARTH BASED ON MN UNEQUAL TO ZERO
     MN不等于零时水平层状大地直流电阻率测深曲线的计算
短句来源
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  层状地球
     SOLVING ε, μ IN LAYERED EARTH MODEL BY MAXWELL SYSTEM
     用Maxwell方程组反演层状地球模型中的ε,μ
短句来源
     We use the generalized reflectiontransmissio matrix and discrete wavenumber method to calculate the coda for layered earth model. In order to reduce calculating time, we modify the Filon quadrature and use it to calculate the wavenumber integration. Numerical simulation shows that computing speed increase over one times for a 300km's synthetic seismogram.
     本文研究一种计算区域地震范围宽频带理论地震图的快速算法.对于层状地球介质模型,使用广义反射、透射系数矩阵和离散波数积分方法计算理论地震图.为了减少计算时间,改进了Filon波数积分方法,并用它来计算波数积分.数值模拟表明,在计算震中距为300km的理论地震图时,计算速度提高了1倍.
短句来源
     In the present paper,the progressive development of quantitative model of current plate motion is expressed. The developing models include the simple expression of geometry, the least squares fitting procedure under the assumption of rigid plate, the series expansion of rotation velocity, the finite element model of elastic plane and spherical shell, the Green′s function method of isotropic homogeneous Earth and the viscoelastic gravitational layered Earth model etc. The used data expands from geological data to spatial geographical survey data.
     从简单的几何学描述到刚性板块假设下的最小二乘法拟合、转动角速度的级数展开、弹性平面和球壳有限元模型、各向同性弹性地球的格林函数方法和粘弹—重力层状地球模型等数学力学模型的引入和发展,从地质数据的不断完善到空间大地测量数据的应用等方面阐述了现今板块运动定量模型不断完善的发展过程。
短句来源
     We expound the mathematical principle of recovering subsurface impedances by L1-norm linear programming algorithm. It is pointed out that under the assumption of layered Earth models, restricting impedances to be of minimum structure form is consistent with computing stratigraphic reflec-tivity series by the L1-norm linear programming algorithm in mathematics.
     首先详细地阐述了用L1模线性规划算法恢复地下波阻抗的数学原理,指出了在层状地球模型假定下限制波阻抗具有极小结构的形式,与数学上用L1模线性规划算法计算地层反射系数序列是相一致的。
短句来源
     (3) for each source-receiver path a different (most appropriate) layered earth model can be used, thus reducing the influence of the earth-mldel error on the solution of the inverse problem.
     ③对于每个接收路径使用不同的层状地球模型,因此,在反演中少了地球模型误差的影响。
  层状地层
     Transient electromagnetic response to a 3-D thin plate in a layered earth.
     层状地层中三维薄板的瞬变电磁响应
短句来源
     Changing model-building formula in traditional layered earth model, the paper presented a blocky structural model-building method for ray-tracing.
     本文改变了传统的层状地层的建模方式,提出了一种射线追踪中块状结构的建模方法。
短句来源
     For a horizontally layered earth it was the first time people get the better result from the direct inversion with full wave data than with single plane wave data only. But the method is difficult to apply to 2D and 3D earth medium with complicated electric structures.
     水平层状地层CSAMT法资料的直接反演法首次尝试了一维空间的全资料CSAMT反演 ,效果较好 ,但该方法尚难应用于 2D、3D复杂介质中 ;
短句来源
  分层大地
     THE APPARENT RESISTIVITY FOR LAYERED EARTH
     水平分层大地的交流视电阻率
短句来源
     This paper investigates the propagating characteristics of the layered earth in a loop antenna case, the result can be served as a helpful guideline for the system design and application.
     对环状发射天线情形下分层大地的有关信道特性进行了探讨,以期为该系统设计及工程应用提供有益的指导。
短句来源

 

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      layered earth
    Reply to the Note on ``Electromagnetic Response of a Large Circular Loop Source on a Layered Earth: A New Computation Method, by
          
    Note on ``Electromagnetic Response of a Large Circular Loop Source on a Layered Earth: A New Computation Method'' by N.
          
    Electromagnetic Response of a Large Circular Loop Source on a Layered Earth: A New Computation Method
          
    -?The technique of Midorikawa (1993) has been modified to obtain a resultant envelope function at the observation point by placing the rupture causing an earthquake in a layered earth model.
          
    In many works it has been computed only considering homogeneous or layered earth models with discretely uniform conductivity.
          
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    A modified definition of apparent resistivity for layered earth is proposed. In the far-zone, the curves of such apparent resistivity appear to have the following characteristics :the superfluous extreemes are more or less suppressed, the fluctuation amplitude of the curves becomes larger than usual, and the apparent resistivity gives closer values to the true resistivities of the individual layers. All these features are helpful to improve the interpretation of the resistivity curves.

    本文给出了水平分层大地视电阻率的一种改进的定义,在这种改进了的视电阻率的远区曲线中,假极值效应有所压低,曲线的起伏度变得比原来的大,视电阻率的值也较接近于地层的真实电阻率.这些特性对于作出正确的判断都是有利的.

    In recent years, in the region around the cities of Beijing and Tianjin, work of seismic deep sounding has been carried out. The purpose is principally for studying the structure of the crust and upper mantle which involves the earthquake source regions of this seismically active portion of the North China Plain. By observing wide angle reflected waves, the reflection PM from the Mohorovicic Discontinuity and PM from the intermediate layer within the crust are recorded. Eefracted waves from the Mohorovicic Discontinuity...

    In recent years, in the region around the cities of Beijing and Tianjin, work of seismic deep sounding has been carried out. The purpose is principally for studying the structure of the crust and upper mantle which involves the earthquake source regions of this seismically active portion of the North China Plain. By observing wide angle reflected waves, the reflection PM from the Mohorovicic Discontinuity and PM from the intermediate layer within the crust are recorded. Eefracted waves from the Mohorovicic Discontinuity have been observed. Assuming a horizontally homogeneous layered structural model, computations of the velocity structure by the damped least square method of inversion were done. Eesults show that apparently, in this entire region velocity varies with depth, as a layered earth. On the other hand, horizontal inhomogenuity actually exists.

    近几年来,京津及其外围地区开展了地震测深工作。其目的主要是研究地震监视区和震源区的地壳和上地幔结构。用点测深方法观测宽角度反射波;莫霍界面反射波P_M、壳内中间层P_C反射波组,以及结晶基底首波P_8与莫霍界面折射波P_N。选用水平均匀分层介质地壳结构模式,应用阻尼最小二乘法反演速度结构。结果表明,该区速度随深度有较明显的成层分布规律,同时也说明该区速度横向不均匀性是存在的。

    When frequencies are less than the frequency for phase peak, each segment of EM coupling spectrum due to a uniform earth or a two-layered earth can be approximately fitted by a Cole-Cole dispersion. Each segment of total apparent complex resistivity spectrum due to a pola-rizable uniform earth or a two-layered earth with a polarizable substratum can be well fitted by either a multiplicative or an additive combination of Cole-Cole dispersions. Inversed IP spectrum by each combination approximates...

    When frequencies are less than the frequency for phase peak, each segment of EM coupling spectrum due to a uniform earth or a two-layered earth can be approximately fitted by a Cole-Cole dispersion. Each segment of total apparent complex resistivity spectrum due to a pola-rizable uniform earth or a two-layered earth with a polarizable substratum can be well fitted by either a multiplicative or an additive combination of Cole-Cole dispersions. Inversed IP spectrum by each combination approximates to the contribution of IP effect, but only the EM coupling inversed by multiplicative one can represent the contribution of EM coupling.

    在频率未达相位峰值频率时,不极化水平均匀大地和二层大地的感应耦合谱的每个频段都可近似地用一个Cole-Cole谱拟合。极化水平均匀大地和底层极化的二层大地的总视复电阻率谱的每个频段都可用乘法或加法组合的两个Cole-Cole谱很好拟合,反演得到的激电谱都近似等于激电效应的贡献,但只有乘法组合反演得到的感应耦合才能代表感应耦合的贡献。

     
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