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inversion parameter
相关语句
  反演参数
     Finally,the inversion parameter estimation is also discussed.
     讨论了反演参数估计的有关问题
短句来源
     In calculation example, the calculative data of Burgers model is used as training sample and the inversion parameter vectors are searched by genetic algorithm.
     在算例中,以Burgers模型的计算数据作为改进神经网络的训练样本,用遗传算法搜索待反演参数解向量.
短句来源
  倒反系数
     The ZnFe2O4 nanocrystallites were prepared at high calcining temperature, whose mean diameter is big, and whose inversion parameter is near zero,and whose magnetic properties are similar to those of the bulk ZnFe2O4 crystallites.
     在高温焙烧制备的纳米晶粒径粗大,倒反系数趋于零,磁特性与大块ZnFe2O4晶体基本相同。
短句来源
     It was found that the ZnFe2O4 nanocrystallites were prepared at low calcining temperature, whose inversion parameter is considerably high, and have remarkable magnetization, and exhibit superparamagnetism at room temperature.
     发现低温焙烧制备的细小的ZnFe2O4纳米晶颗粒具有较大的倒反系数和磁化强度,在室温下呈超顺磁性;
短句来源
  “inversion parameter”译为未确定词的双语例句
     The correlations between concentrations of three mainly air pollutants (TSP?SO2?NOX) and inversion parameter at the same times were analysised, the correlations between concentrations of air pollutants and surface meteorological elements were analysised too. The results show:(1) The correlation coefficients between air pollutant concentrations and thickness of inversion is positive.
     对 3种主要空气污染物TSP、SO2 、NOX 浓度值与同期表征逆温特征的逆温参数及地面气象要素作了统计分析 ,结果表明 :(1)污染物浓度与逆温层厚度呈显著正相关 ;
短句来源
     Then we analyzed and discussed the impact on ability of using well log constrained inversion to solve geologic problems from three aspects:quality of basic data,the method of well log constrained inversion and the selection of inversion parameter and building up the model of stratigraphic framework and extrapolation control.
     然后从基础资料的品质、测井约束地震反演方法及反演参数的选择、地层格架模型建立和外推控制三个方面 ,分析、探讨测井约束地震反演解决地质问题的能力 ;
短句来源
     while the second is limitation from forward problem solving rate and inversion parameter dimensionality,the interface cannot be divided precisely.
     二是受正演速度及反演参量维数的限制,不能对界面进行精细划分。
短句来源
     The introduction of quasi-neural network BP algorithm,firstly solved the fast 3D forward problem,then the breakthrough of limitation from inversion parameter dimensionality,realized the fast convergence,so that effectively solved the inverse problem with two or multiple density interfaces.
     拟神经网络BP算法的引入,首先解决了快速三维正演问题,又突破了反演参量维数的限制,实现快速收敛,有效解决两个或多个密度界面的反演问题。
短句来源
     The introduction of quasi-neural networkBP algorithm,firstly solved the fast 3D forward problem,then the breakthrough of limitation from inversion parameter dimen-sionality,realized the fast convergence,so that effectively solved the inverse problem with two or multiple density interfaces.
     拟神经网络BP 算法的引入,首先解决了快速三维正演问题,又突破了反演参量维数的限制,实现快速收敛,有效解决两个或多个密度界面的反演问题。
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  相似匹配句对
     PARAMETER INVERSION IN TAU-P DOMAIN
     Tau-P域参数反演
短句来源
     Research on Inversion of Seafloor Parameter
     海底参数反演技术研究
短句来源
     On Inversion and Emphasis
     谈英语的倒装与强调
短句来源
     and b was empirical parameter.
     b为经验常数。
短句来源
     estimation of its parameter;
     评定运动模糊的参数;
短句来源
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  inversion parameter
We deduce estimates of the inversion parameter from the relative intensities of the two A1g Raman modes in very good agreement with estimates made from other measurements.
      
Results show that both the inversion parameter and radius ratio have a significant influence on the flow structure and heat transfer rate in the annulus.
      
The effects of the inversion parameterΘm, radius ratioR*, aspect ratioAR, Forchheimer inertia parameter Fc/Pr, and Darcy number parameter Da on the heat transfer and fluid flow characteristics are discussed in detail.
      
With nickel ion substitution addition, the lattice parameter, X-ray density, cation distribution, inversion parameter and radius of octahedral and tetrahedral sites are calculated.
      
Cation distribution, obtained from structural and chemical data, showed a very high Mg-Al disorder, with an Al(T) content of 0.205 and an inversion parameter, i, of about 0.23.
      
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In this paper, the Laplace transformed boundary element method is used to analyse the transient responses of surface crack. The choice of Laplace inversion parameters and the calculation of dynamic SIF are discussed here in special. To verify the computation procedure and choose the discretization format, the transient displacement response of a prismatical beam under p(t) = p0H(t) loading and the transient SIF response of a thick plate with a through-thickness crack under two different discretization...

In this paper, the Laplace transformed boundary element method is used to analyse the transient responses of surface crack. The choice of Laplace inversion parameters and the calculation of dynamic SIF are discussed here in special. To verify the computation procedure and choose the discretization format, the transient displacement response of a prismatical beam under p(t) = p0H(t) loading and the transient SIF response of a thick plate with a through-thickness crack under two different discretization schemes are calculated. Finally, the transient SIF response of a plate with a semi-circular surface crack under several different loading conditions has also computed, and the results are shown to be quite good.

本文将拉氏变换-边界元法用于表面裂纹问题的瞬态响应分析。文中讨论了拉氏反演参数的选择和动态应力强度因子的计算方法。作为程序的考核和离散方案的选择,分别地计算了水平柱体一端固定、另一端受p(t)=poH(t)载荷时的位移响应和具有贯穿裂纹的厚板在两种离散方案时的动态应力强度因子响应。最后,还计算了若干载荷工况的半圆表面裂纹板应力强度因子的瞬态响应,获得了有效的数值结果。

This paper proposed a crosshole tomographic method using precise ray-tracing in complex medium,The block model is described by local linear function of mode for cell velocity distribution,and precise inversion formula corresponding with forward calculation was given. It was not only avoid the disagreement between model parameters and inversion parameters but also soluted dismatch problem on forward and inversion in traditional curve ray-tracing. In order to make forward calculation fast,...

This paper proposed a crosshole tomographic method using precise ray-tracing in complex medium,The block model is described by local linear function of mode for cell velocity distribution,and precise inversion formula corresponding with forward calculation was given. It was not only avoid the disagreement between model parameters and inversion parameters but also soluted dismatch problem on forward and inversion in traditional curve ray-tracing. In order to make forward calculation fast, an improved shot-method was used in two-point problem. The numerical and practical application results show that the proposed precise ray method is fast, stable, reliable and applicable.

本文提出一种井间复杂介质中的精确射线层析成像方法。该方法给出了一种以节点速度的局部线性函数来表示单元速度分布的块模型描述,在这种模型下作者导出了精确的正反演计算公式。从而避免了常规弯曲射线层析成像中反演参数与模型参数之间的不一致性,解决了常规弯曲射线层析成像中的正反演不匹配问题。并提出了一种改进的打靶方法,大大提高了运算速度。数值的与实际应用的结果表明,本文给出的精确射线层析成像算法是快速、稳定、可靠、适用的.

Approximate expression as the function of ray parameters can be derived fromthe accurate P-SV reflection coefficient formula. The approximate expression showsthat when in non-normal incidence, P-SV reflection coefficient mainly depends ontwo elastic parameters: 1)△ρ/ρ,the ratio of bulk density difference to average bulkdensity from both sides of an interface;and 2) △μ/ρ,the ratio of shear modulus difference to average bulk density. Numerical example result is given to show computation accuracy of...

Approximate expression as the function of ray parameters can be derived fromthe accurate P-SV reflection coefficient formula. The approximate expression showsthat when in non-normal incidence, P-SV reflection coefficient mainly depends ontwo elastic parameters: 1)△ρ/ρ,the ratio of bulk density difference to average bulkdensity from both sides of an interface;and 2) △μ/ρ,the ratio of shear modulus difference to average bulk density. Numerical example result is given to show computation accuracy of the approximate expression,and compared with the numerical results of Aki and Richards' (1980)approximate formula. The applicability of our approximate expression is analysed here. The inversion parameters computed by usingdamped least-sqllares inversion theory demonstrate that in AVO data linear inversion, △μ/ρ estimation is more accurate than △σ (Poisson ratio difference) estimation.

本文从精确的P-SV反射系数公式出发,推导出了作为射线参数函数的近似公式。该式说明,在非法线入射时,P-SV波反射系数主要取决于两个弹性参数:①反射界面两侧介质体密度之差与平均体密度之比△ρ/ρ;②反射界面两侧切变模量差与平均体密度之比△μ/ρ。文中还给出了数值实例,以说明该式的计算精度,同时分析了其适用范围,并与Aki和Richards(1980)的近似式的数值结果作了比较。本文采用阻尼最小平方反演理论计算出的反演参数的结果表明,在AVO资料线性反演中,估算△μ/ρ比估算泊松比差△σ精度高。

 
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