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正演计算
相关语句
  forward calculation
    3D RESISTIVITY FORWARD CALCULATION ACCELERATEDBY ICCG ITERATION TECHNIQUE
    利用ICCG迭代技术加快电阻率三维正演计算
短句来源
    Seismic wavelet is an important parameter sequence for both the forward calculation and the inversion of seismic records.
    无论是在地震记录的正演计算或反演过程中,地震子波都是一个十分重要的参数序列,如果子波不准,则正演结果就不精确,与实际地震资料也难以吻合;
短句来源
    That is, althought only one forward calculation is required in eachinversion iteration, however, it requires tens of inersion iterations and each iterationcrquries much hours, so the inversion is much more time-consuming.
    因为,尽管每次反演迭代仅需一次正演计算,但传统的最小构造反演通常需几十次迭代才能收敛,而电阻率三维反演每次迭代需时较长,反演依然耗时太多。
短句来源
    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。
短句来源
    Firstly, the minimum structure inverse equations are solved. In doing so, the CG relaxation technique only requires the results of derivative matrix G and its transpose G~T multipled by a vectors, i.e. Gx and G~Ty, respectively. Then the Rodi method is introduced to compute, and the Jcobian matrix G, Gx and G~Ty can be got after one forward calculation in each inverse iteration.
    首先,运用共轭梯度迭代算法解反问题的线性方程组,只需求Jacobian矩阵G与任一向量x的 乘积Gx及G~T与任何一向量y的乘积G~Ty,再引入G的Rodi算法,则Gx及G~Ty均可在每次反 演迭代中的一次正演计算后一并求得.因此,每次反演迭代仅需一次正演计算,大大加快了 计算速度;
短句来源
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  forward computation
    Forward computation of high order derivative of gravity anomaly relating to complex geologic body
    复杂形体重力异常高阶导数的正演计算
短句来源
    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。
短句来源
    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;
短句来源
    This algorithmhas the advantages of both these methods, results in quite high computation accura-cy and efficiency, and applies to the forward computation of elastic wave field.
    该方法结合了有限元法和虚谱法的优点,具有较高的精度和计算效率,适用于弹性波场的正演计算
短句来源
    Its basic idea is that the model space is quantified into finite model sets, then select a most prospective model according to a certain searching tactics to perform forward computation, compare the forward results with the observed data and compute the objective function; if the function value is less than a given value, then the model is the inversion result, and if not, continue searching, forward com-putation and comparing repeatedly until a satisfactory solution estimate is found.
    其基本思想是把模型空间量化成有限模型集,而后按一定的搜索策略选择一个最有希望的模型进行正演计算,再把正演结果与观测数据比较并计算目标函数,如果目标函数小于给定值,则此时的模型即为反演结果,否则继续搜索、正演、比较,不断重复此过程,直到找到一个满意的解估计。
短句来源
  direct calculation
    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。
短句来源
  “正演计算”译为未确定词的双语例句
    BOUNDARY ELEMENT METHOD FOR FORWARD SOLUTION OF TWO DIMENSIONAL FREQUENCY ELECTROMAGNETIC SOUNDING
    二维频率测深边界单元法正演计算
短句来源
    The Normal Deduction Calculation and its PrelimnaryExplanation of the Transient Sounding Resistivity Curve
    瞬变测深视电阻率曲线的正演计算及其初步解释
短句来源
    Forward finite differential calculation for 3-D transient electromagnetic field.
    3D瞬变电磁场的有限差分正演计算
短句来源
    Using conjugate gradientiterative algorithm to solve the smallest tectonic invertion algorithms of linearequations, and only need calculate G-1 Vectors X product results Gx and the transposevectors GTy results.
    运用共轭梯度迭代算法来解最小构造反演算法中的线性方程组,只需要G与任一向量X的乘积结果Gx及G的转置GTG与任一向量)y的乘积结果GTy,而Gx及GTy均可在每次反演迭代中的一次正演计算后求得,这样每次反演迭代只-需要一次正演计算,力口快了反演速度。
短句来源
    SOME NEW RESULTS OF FORWARD MODELLING FOR 2-D ELECTRICAL PROSPECTING BY THE FINITE-ELEMENT METHOD
    电法二维有限元正演计算的若干新结果
短句来源
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  forward calculation
A 3-D FDTD method with perfectly matched layer (PML) absorbing boundary condition (ABC) is selected for the forward calculation of the scattered field by the buried object.
      
Although the relation between theINTRA-LORE and the wave function is simple, a straight forward calculation is not possible.
      
Preliminary result of 3-D gravitational forward calculation study in Bohai Sea
      
To that end the forward calculation is restarted from suitably placed checkpoints leading to a more or less complicated reversal schedule.
      
In the forward calculation, estimates of the unknown material parameters are used to get tentative predictions of the measurements.
      
更多          
  forward computation
Block diagram implementation of the time-recursive algorithm is described, computational complexity with respect to increasing block size is compared with straight forward computation, and the proper time-recursive block size is suggested.
      
This approach avoids forward computation on the complex geometry of irregular grids.
      
A forward computation algorithm continuously computes dynamic slices as statements are executed.
      
As far as we know, no experimental data has been published for forward computation algorithm.
      
As mentioned above, the forward computation algorithms maintain the latest dynamic slice for each variable/location.
      
更多          
  direct calculation
Together with traditional maximization of the Lundberg characteristic coefficient R is considered the problem of direct calculation of insurer's ruin probability ?r (x) as an initial-capital function x under the prescribed level of net-retention r.
      
With the use of dispersion forces as an example, it is demonstrated by direct calculation that a correction to the Gibbs formula for the variations of surface tension can be substantial for nanoparticles that approach molecular sizes.
      
A high-speed precision digital phase meter with direct calculation of the signal phase
      
The AD mutation rate was estimated by direct calculation.
      
The method is based on direct calculation of the dynamics of photosynthate accumulation and absorption rates of nitrogen compounds in the plant root system.
      
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It has been shown that the calculation resultS Of the two methods,the simplified integral and quadratic interpolation methods used in 1 D modelling of CSAMT(Controlled Source Audio frequency Magnetotellurics )method differs from each other significantly.A third method which can be called direct integral method,is suggested in this paper.Large number of calculations indicates that the simplified integral and direct integral methods have highes calculation precision,and can be used inthe inversion of real CSAMT...

It has been shown that the calculation resultS Of the two methods,the simplified integral and quadratic interpolation methods used in 1 D modelling of CSAMT(Controlled Source Audio frequency Magnetotellurics )method differs from each other significantly.A third method which can be called direct integral method,is suggested in this paper.Large number of calculations indicates that the simplified integral and direct integral methods have highes calculation precision,and can be used inthe inversion of real CSAMT data.

研究发现,两种目前比较常用的可控源音频磁大地电流法(CSAMT)的正演计算方法,即简化积分法和二次插值法之间计算结果差异较大。为了正确地评价这两种方法的计算精度,本文提出了利用直接积分进行,CSAMT一维正演的算法,即通过将任意角度频率测深 ̄[1]正演结果沿发射源方向直接进行数值积分,得到有限长度发射源的CSAMT正演结果。大量计算和精度评价发现,在这些算法中,简化积分法和本文提出的直接积分法计算结果吻合很好,是精度较高的算法,而二次插值法与前两种算法结果差别较大,是精度较低的算法。

The theories of Dyadic Green's function and integral equations are used to carry out direct calculation of three-dimensional problems in frequency-domain electromagnetic sounding methods.The precision of calculation are also discussed.The effect on apparent resistivity curves and pseudo-sections from high-or low-conductivity abnormal bodies each has its own characters.The center of measure electrodes is chosen as the recording point,which makes the apparent resistivity responses acquire maxium abnormaly above...

The theories of Dyadic Green's function and integral equations are used to carry out direct calculation of three-dimensional problems in frequency-domain electromagnetic sounding methods.The precision of calculation are also discussed.The effect on apparent resistivity curves and pseudo-sections from high-or low-conductivity abnormal bodies each has its own characters.The center of measure electrodes is chosen as the recording point,which makes the apparent resistivity responses acquire maxium abnormaly above the center of the abnormal body,and the pseudo-sections correspond to the abnormal bodles very well. But the suitability of the choice to the field work is to be discussed further.

利用现有的并矢格林函数和积分方程理论对轴向频率测深三维问题进行正演模拟,并讨论其精度.三维良导体或高阻体的存在对频率测深电场分量Ex定义的视电阻率响应(振幅、相位)分布特征的影响各有其特殊的规律性.选择测量电极中心作为频率测深三维问题正演计算结果的记录点,既使视电阻率响应在异常体正上方获得最大异常,同时又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 FDEM responses of 3D body are calculated by integral equation method, which can be changed into TDEM responses by inverse cosine tranform. To explain the sign reversals of TDEM responses in late time stage, Cole-Cole model which describes the character of frequency-diversity of resistivity of polarizable body are introduced into the direct calculation. It has been shown that IP effects on TDEM field are influenced by the the geometric, electrical and IP parameters.

利用并矢格林函数理论和积分方程方法计算两层大地中三维异常体的频率域电磁响应,并利用反余弦变换方法将其转换为时间域电磁响应.为了解释时间域电磁响应晚期段经常出现的场值变号现象,将描述电阻率频散特征的Cole-Cole模型引入到正演计算之中.计算表明,时间域电磁法的激电效应(IP)特征不仅受异常体的激电及电阻率参数的影响,而且受异常体的几何参数影响.

 
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