查询词典 extrapolation

The sources of the published data, with the group additivity path used in extrapolation where appropriate, are indicated in Table 1 for each species.

在必要时，氮气heteroatom 代替在a 和苯一样six-membered 圆环由形成热的改变塑造了由数额对吡啶转换。

Based on wave propagation feature, this paper analyses 3D seismic migration algorithms such as alternating direction implicit method, LU decomposition method, and inverse operator approach method. The result shows that the alternating direction implicit method is fast but causes distortion in wave field extrapolation and affects image accuracy; however LU decomposition and inverse operator approach methods are fast while holding circular symmetry of wave field, and are promising in oilfield exploration and development.

在波的传播特征分析基础上，对交替方向隐式法、LU分解法、逆算子逼近法等三维地震偏移算法进行了分析研究，结果表明，交替方向隐式法虽然快捷但是在波场外推中明显产生畸变并影响成像的准确性，而LU分解和逆算子逼近法是保持波场圆对称特征前提下的快速算法，在油田勘探开发中具有较好的应用前景。

This paper focuses attention on studying the basic theory of wide angle reflection and analyzing some typical models by using Gauss Ray forward extrapolation, by which people can draw some important conclusions .

对广角反射的基本原理作了较为深入的研究，同时通过典型模型实例，采用高斯射线正演的分析方法，得到了一些重要的结论：采用广角反射可以得到信噪比比常规方法高的地震信息，这对地震数据的处理十分有用；广角反射波信息出现在直达波以外，炮检距很大，但能量比非广角反射波能量高。

An asymptotic expansion of the errors with O(h3) is shown. Therefore , by using extrapolation we can improve the accuracy order of approximations.

该方法的优点在于奇点处权函数的选择，并且证明了误差有h3幂渐进展式，从而可以利用外推达到加速收敛的目的，更好地提高了计算精度。

If we can get, a multiparameter asymptotic expansion of double-quadratic isoparametric finite element errors on coarse grid with respect to independent grid setps , we can get several splitting extrapolation formulas.

只要我们对粗网格上的双二次等参有限元的误差可以证明对独立步长有多变量渐近展开式，我们就能得到分裂外推公式。

While there are no direct human studies on the effect of melamine on humans, extrapolation from animal studies can be used to estimate adverse health effects.

关于三聚氰胺对人体的影响，虽然没有直接的人体研究，但可以从动物研究推测其对人体健康的不利影响。

In addition to the anatomical differences between cervical and lumbar facet joints, this study used the stringent criterion of "complete or profound pain relief" as the bench mark for a positive block, leaving the question of extrapolation subject to debate.

而且，由于颈椎和腰椎解剖结构的不同，这项研究采用的标准比较严格，达到"完全或深度缓解"才作为阻滞阳性的标志，使其结果的向外推论性需要进一步讨论。

The solubility limit of element Ta in binary compound NiZr2 wasdetermined as 13.5 at% at the present experimental temperature.3 The investigation of the phase equilibrium relation arid the thermodynamic extrapolation of Ni-Cr-Zr ternary system at 1173 KThe isothermal section of Ni-Cr-Zr ternary system at 1173 K was determined and the phase equilibrium relation and their stability were analyzed and discussed.

同时，利用文献所报道的有关该体系的相关二元子系统的热力学信息成功地外推和预测了该三元系的热力学性质。

Based on the relative theories of biomathematics, a new approach to trend extrapolation of time series of ecological footprints is proposed in this paper. Materials for analysis were taken from the agricultural areas of oases in the Hexi region of Gansu province as an example.

应用数学生态学的有关理论与方法，结合生态足迹的概念，提出了一种生态足迹时间序列的新的趋势外推分析方法；并以甘肃省河西绿洲农业区为研究对象，对其生态足迹进行了趋势外推分析的实例计算。

In order to study magnetic topology in chromosphere and corona, extrapolation of magnetic field muxt be done.

要研究色球及日冕的磁场拓扑结构，必须对光球磁场进行理论外推。

Among which is the mindset, perceptions and moralities of those who accept mini- military tasks for economic gains.

其中最重要的是心态，观念和道德的人谁接受小型军事任务的经济收益。

In time course imaging, activity peaked 2 days after coronary ligation.

在时程成像检测，活性峰值在冠脉结扎后2天。