三维空间

This paper introduces a method to calculate the three-dimensional electric field in a substation.

本文介绍了一种计算变电站三维空间电场的方法。

Firstly, a set of elementary maneuvers which find use as candidates for the tactical maneuvers are selected within the bounds of flight envelope.

首先在两机各自极限运动范围内选择一组基本战术动作，这些基本战术动作满足飞机在三维空间内运动的质点动力学方程。

A three-dimensional surface, all points of which are equidistant from a fixed point.

球面一个三维空间表面上所有点都与该空间的中心点距离相等

When the impurities are not in the X-Y plane, the calculation skill using the equivalent charge transformation formula and charts is also discussed.

文中还讨论了运用等效电荷变换公式和变换图表，把三维空间的杂质转换成在X-Y平面上的问题来处理。

This paper disserts the represent form of space data model, and discusses three dimensional space data model based on the grid, and points out the integrated necessariness and integrated represent method about the grid-vector spatial data model, and provids a Euclidean distance converting model and algorithm with regard to change from vector data to grid data, as well as establishes the foundation for spatial data handing and spatial data mining.

文章论述了空间数据模型的表示形式，重点讨论了基于栅格的三维空间数据模型，指出了栅格矢量空间数据模型集成化的必要性以及集成化表示方法，给出了将矢量数据转换为栅格数据的欧氏距离变换与算法，为基于栅格空间数据的空间数据处理和空间数据挖掘奠定了基础。

Finally, the guidance law for intercepting maneuvering evader with the varying velocity is considered based on the basis of the observation.

并应用这一方法研究了二维平面和三维空间中，基于观测器的拦截任意机动变速目标的最优导引律。

You can download a free evaluation copy of our "Galaxy 3D Space Tour" screensaver or purchase an unlimited version.

您可以下载免费评估版我们的"银河三维空间之旅"屏幕保护程序或购买无限的版本。

Based on research results of this project, 3-dimensional model of excavating deep foundation pit are introduced.

研究结果表明，基坑开挖与支护是一个与基坑周围土体及支护结构性质密切相关的复杂的三维空间问题。

In view of the demand of computerized eye-glasses-wearing system, an approach to match two dimensional (2D) human head images with 3D glasses frame graphics in 3D space has been proposed. First, the operator points out three or six key points, which are used to locate 3D eye-glasses frame, on the human face image displayed on the computer screen interactively.

论文针对计算机化眼镜配戴系统的要求，提出了一种在三维空间匹配二维人头图象和三维眼镜图形的方法，即通过人机交互方法，由操作者在显示于计算机屏幕上的二维人头图象上，指出确定三维眼镜位置的三个或六个关键点的二维坐标及其三维对应点，从而可以近似求出人面朝向及视点坐标，再用相应位置上的三维通用人头图形替换二维人面图象，计算人面和眼镜间的遮挡关系并显示，从而完成二者的空间匹配。

We are extremely pleased to be able to report that it has been a success: Our three dimensional fabricator is now fully operational and we have used it to print several large, low-resolution, objects out of pure sugar.

我们非常高兴能够公布这个消息：它已经成功了！我们的这个三维空间打造者目前已经全面运作，并且我们也已经习惯于脱离砂糖去打印几个大的、低分辨率的物质。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。