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    So it isvery significant to investigate integral equation modeling of 3-D CSAMT responseand the modeling software INTEM3D_v2 which is based on integral equation is veryuseful .
    基于积分方程法编写的三维正演软件 INTEM3D_v2 在研究三维 CSAMT 的正演规律方面起到了很好的效果。 在本论文中,我们针对这些场源效应设计了不同的模型,利用该软件进行正演计算,初步探讨了其规律。
    We simulate the magnetotelluric response to two-dimensional earth topographyusing finite elements.
    论文中将有限元法用于大地电磁场的二维带地形正演计算
    In the simulation of 2D geo-electric field forward modeling, the finite element method is used great widely.
    在二维视电阻率的正演计算中,有限元法是运用比较广泛和成熟的一种方法。
    D transient electromagnetic field for a layered model has been computed numerically by using the G-S inverse Laplace transform, and a new Random search method is used to complete the TEM inversion.
    利用G-S(Gaver-Stehfest)拉氏逆变换方法对层状地电模型阶跃电流偶极源激发下的瞬变电磁响应作了正演计算
    The method can be used tomodel various complicated stable wave fields.
    该方法不仅能够用于各种复杂波场的正演计算,而且模拟出的波场具有较好的稳定性。
    The stack of vertical and hori-zontal dipole fields favours successfully analysing the forward problems in boreholeto borehole and borehole to ground seismic measurements,horizontal-well inductionlog,and induction diplog.
    将垂直偶极子场和水平偶极子场叠加可解决地层的井-井、并-地面勘探以及水平并感应测井和感应倾角测井的正演计算问题。
    The center of measuring electrode is taken as recording point so as to cause both the apparent resistivity over a three-dimensional abnormal body to be maximum and the pseudosection to correspond with the abnormal body quite well.
    选择测量电极中心作为记录点,既能使正演计算的视电阻率响应在异常体上方获得最大异常,又能使正演计算的拟断面图的异常分布与异常体之间有很好的对应关系。
    The discovery of this regularitycan considerably reduce the time of two-dimensional finite element direct calculation, and makepossible its full application in the inverse problem.
    上述规律的发现可以大大节省二维有限元正演的计算时间,使之在反演中的充分应用成为可能。
    The application of neutron transport theory to the numerical simulation of neutron welllogging is discussed. The calculation was performed for model wells with differentlithologies ,borehole diameter and lithology conditions by using DOT4. 2 and the common nu-clear data library, The numerical results are satisfactory。
    讨论了中子输运理论在中子测井数值模拟中的应用,用国际通用的核数据库和中子输运离散纵标程序DOT4.2对不同岩性、几何尺寸和地质环境条件(如岩层矿化度等)的模型井进行了响应曲线的数值模拟计算,从而实现了中子测井的正演计算,同时根据计算结果制作了不同测井环境条件下的理论校正图版,结果令人满意。
    It takes advantage of the reverse projection technique of seismic wave and electromagnetic wave, and applies the reverse projection of resistivity combined with the utilization of routine algorithm (conductive center method for direct calculation and nonlinear least squares method for inverse revision)so as to carry out the reconstriction of two-dimensional resistivity image.
    介绍了电阻率成像的几种供收方式,借鉴地震波和电磁波的反投影技术,应用电阻率反投影并联合使用常规算法,即导电α中心法作正演计算、非线性最小二乘法作反演修改,从而进行二维电阻率的图像重建。
    Using Koefoed method,the present paper makes a discussion on arch problems in automatic direct intorpretation of electric sounding curve as data-collecting and calculation,inverse calcculation, direct calulation, image processing and calculation precision of reduced sampling valuos.
    本文对应用Koefoed法自动直接解释电测深曲线中的数据采集、归他采样值的计算、反演计算、正演计算、图象处理以及计算精度等问题作了讨论。
    Starting with AVO forward calculation, this paper gives analysis to the AVO abnormal characteristic of gas sand verified by drilling and proposes the AVO negative abnormal characteristic of shallow gas reservoirs in Yinggehai Basin.
    从AVO正演计算入手,分析了已被钻井证实的含气砂岩的AVO异常特性,提出了莺歌海盆地浅部气层所具有的AVO负异常的特殊规律,探讨AVO技术在莺歌海盆地找气的应用前景.
    In this paper, the data acquisition,the calculation of the Standard Sample Valves,the inverse calculation,the forward calculation,the graphic display for interpretation results and the calculation precision are discussed in using the Koefoed automatic direct interpretation method for resistivity sounding. The softwares of automatic interpretation for resistivity sounding are developed.
    讨论了应用Koefoed法自动直接解释电测深曲线中的数据采集、归化采样值的计算、反演计算、正演计算、图形显示以及计算精度等问题,并介绍了由作者开发的一套完整的电测深自动解释软件。
    In this technique,we need not repeatedly solve wave equation for forward estimation of each shot,but combine the traces of some shots to form new group of traces, called post--addition seismic traces.
    该法在正演计算时,不是每一炮的正演计算都要解一次波动方程,而是按炮点将各道地震记录相加得到了一组新的地震记录,称为加后地震记录。
    A Hamilton system is obtained by converting the mathematical model of artificial seism in one dimension to partial differential equations and discreting space partial derivative. The symplectic difference scheme is formed by using trapezoid formula for finding the numerical solution of this system, the formula corresponding to the diagonal Pade approximation of exp (x). The stability of this argorithm is proved.
    首先将一维人工地震的数学模型化为偏微分方程组,离散此方程组的空间偏导数得到一个Hamilton系统,再用梯形公式,它对应ex的对角Pade逼近,来求该系统的数值解即得到这个问题的辛差分算法.证明了该算法的稳定性,给出了正演计算实例,及计算解和理论解的比较.
    At first, the calculation of a model is made and compared with the Q value distribution by the inversion of ART method, the simulation on computer shows that the relative deviation of Q value is 6 8% between these two cases.
    作了模型正演计算求得吸收特征时间t*,接着用这些t*求反演的Q值分布作比较,求出Q值的相对误差的空间分布在6-8%,说明这种方法用于Q值反演的正确性。
    For the study of the reflective law of the three dimensional geologic body on the various curves of high density electrical resistivity method, this paper compiles the forward calculating programme of high density electrical resistivity method for the geoelectric body of arbitrary form and calculations have been conducted.
    为了研究三维地质体在高密度电阻率法各种曲线上的反映规律,本文编制了任意形状地电体的高密度电阻率法正演计算程序,并进行了计算.
    It is hence quite possible to use it in resistivity tomography of field surface surveying. Using Fortran Language, the authors made programming for realizing the aboe process, and used the 2. 5 dimensional finite element method in forward modeling.
    作者用Fortran语言编制了实现上述过程的程序,对所有数学模型的正演计算均采用2.5维有限元法。
    The article also describes how we distinguish thephenomena of these problems, design crosshole model for forward computation,analyse their generation mechanisms quantitatively and qualitatively,and take somesatisfactory measures for coping with them so as to improve the effect of tomogra-phy.
    文中展示了这些问题的现象,并设计了井间模型进行正演计算,从理论上定量或定性地分析其形成机制,提出相应的改正方法和对策,旨在提高层析成像的效果。
    The method takes two essentia1 measures:. Improve the forward computation accuracy by making steep-dip approximation of the diffraction term equation.
    该方法中主要采用两点措施:①通过衍射项方程的陡倾角近似,提高正演计算的精度;
 

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