查询词典 two dimensional

Key words two-dimensional wave equation; parameter inversion; differential evolution algorithm; finite element

利用微分进化算法进行二维波动方程参数反演的研究。

Differential scattering field of vertical incident Gaussian beam from a two-dimensional target near a plane interface is studied by means of a new hybrid method based on the reciprocity theorem, the image theory and the method of moment.

基于矩量法、互易性定理及镜像理论，提出了一种新的混合方法用于研究水平分界面上方二维介质目标对垂直入射高斯波束的差值散射场。

Diffraction stack: A weighted stack of all the elements of reflected energy along a diffraction curve which yields a migrated section (to the extent that the data were two-dimensional).

沿绕射曲线所有反射能量的加权叠加从而得到一个偏移剖面(如绕射叠加：果数据是二维的)。

The features of this dissertation are lie in: a The concept of"Influence Distance"was presented to quantitatively express"corner effect", systematicly studied on the influence of all factors on"influence distance". It could provide reference to angle designing from the view of heat treatment; b Deeply studied on the influence of shape factor to carbon concentration field. It could provide reference to gear designing from the view of heat treatment; c New model was set up to describe the two-dimensional concentration field of carbide dispersion carburizing. The shortcomings of"effective diffusion constant method"and"equilibrium constant method"were overcome in this model.

本文的特色在于：①提出了用"尖角影响距离"定量描述"尖角效应"的方法，并系统研究了各种因素对"尖角影响距离"的影响规律，从热处理角度为工件尖角部位的设计提供依据；②首次深入研究了齿轮的各种形状因素对浓度场的影响，从热处理角度为齿轮设计提供依据；③建立了能够更有效地模拟过饱和渗碳浓度场的数学模型，该模型克服了"有效扩散系数法"及"平衡常数法"的不足，与"最小自由能法"可互为补充。

For example new algorithms for image analysis of two dimensional gels have been developed within the last five years.

例如，二维凝胶的图像分析的新算法在过去的5年间已被开发。

A new algorithm based on the method of moments is introduced for the scattering analysis of two dimensional targets.

针对二维目标电磁散射特性分析问题，提出了一种基于传统矩量法的新算法。

The theory of parabolic equation was presented,and was applied to the scattering analysis of two dimensional perfectly electric conducting objects.

对抛物线方程算法的基本原理进行了详细论述，并将其运用到二维导体目标的电磁散射特性分析中。

The compact difference scheme for two dimensional Boussinesq equation is given on a staggered grid.

在交错网格上构造了求解非线性Boussinesq方程的紧致差分格式，此格式可以在只用到三个网格结点的情况下，达到空间四阶精度。

This means that the data is stored in two dimensional tables.

这意味着数据存储在二维的表中。

However, because of government cuts, we could manage to provide only a two dimensional screen.

然而，由于政府支出的削减，我们只能提供一个两倍空间的屏幕。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。