查询词典 plane surface

The lens has a section in a plane normal to a longitudinal axis of the lens, in which a surface of the lens facing the light source has a curved line that expands or is convexly facing toward the light source.

所述透镜在与透镜的纵向方向垂直的平面上具有截面，在该截面中，透镜的面向线光源的表面具有朝向光源扩张的曲线。

The DEM in the new geodetic coordinate system on the ellipsoidal surface is different from the DEM in the projection plane.

基于此种坐标系在椭球面上建立DEM不同于基于地图投影概念的DEM。

The quantities ba are the covariant components of a plane tensor, called the curvature tensor of the surface

baβ是"平面张量"的协变分量，叫做该曲面的曲率张量。

Therefore at each time we get the roots of this cubic equation, we can decide if we keep or reject each root according to the continuity of the curved surface, the method is as follows: If , the relative cubic plane curve is just a circle, this circle can be gotten by solving .

因此在每次求得该一元三次方程的解时，我们根据曲面的连续性来判断这些根的取舍，方法如下：在处，所得的平面曲线就是圆截线，该圆截线可以由相截得到，即。

Detail are introduced as following: transfering the LS equation to difference equation, setting the initial conditions for different shape explosive at different initiation way (point, line, plane, divergent or convergent); the dealing method of different edge conditions; how to draw the curve graph in two dimensional space or surface graph in three dimensional space with the calculated data.

本文提出了在三维直角坐标系中爆轰波传播LS方程离散化方法，建立了相应的差分方程，研究了对不同形状炸药在多种起爆形式（点、线、面、散心、聚心）下初值条件的设定，以及各种边界条件的处理方法。

It discusses the definite methods of cutting-pattern lines in the paper and also solves the problems to expansion of the membrane curved surface on the basis of modeling analysis. The paper combines two kinds of methods: the plane cutting method and the expansion method based on spring-mass system, to realize the cutting pattern analysis of the pneumatic membrane structure.

本文在造型分析的基础上对裁剪线的确定方法进行讨论，并对膜曲面的展开进行了分析，结合两种方法——平面切割法和基于弹簧质点系统的展开方法，完成了充气膜结构的裁剪分析。

In the planetary orbit more or less (is called ecliptic surface and take the revolution in the identical plane as datum).

行星轨道中或多或少在同一平面内（称为黄道面并以地球公转轨道面为基准）。

Height datum: Symmetry plane or the bottom surface.

高度基准上下对称面或底平面(Z = 0)。

In the shape analysis of stress surface contour of 3D footprint, the consistency of datum plane cannot be strictly controlled, so a descriptor insensitive to perspective transform is needed.

在立体足迹的重压面边界围线的形状分类和识别中，由于不能严格控制基准面方向的一致性，必须采取对透视变换不敏感的描述方法。

At present, the main approach for seismic data imaging is the prestack Kirchhoff time migration, however, violent variation of surface elevation makes the datum plane selection of prestack time migration very difficult.

目前该类地区地震勘探中主要的成像手段依然是Kirchhoff叠前时间偏移。但地表高程的剧烈变化使叠前时间偏移的基准面很难选择。

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。