平面

In this paper,the area ratio of plane figure affine transformation in space is investigated,and the transformation equation of λ multiple of area is got , the area change of plane figure under affine transformation in space is studied, a important property of three axis ellipsoid is given and proved.

探讨了空间场的仿射变换下平面图形的面积比，推导出λ倍积变换方程式，进而探讨了空间场的仿射变换下平面图形面积的变化规律，给出并证明了三轴椭球体的一个重要性质。

These application examples indicate that the direct method derived in this paper simplifies the process of constructing the Airy function in specific plane problems.

这些例子说明，利用本文的观察法可以将某些平面问题应力函数构造的过程简单化。关键词双调和函数， Airy应力函数，弹性力学平面问题

Along with the increasing dimension of the ambient space and the number of hyperplanes, the arrangements will become more and more complicated.

随着空间维数的增大，超平面个数的增加，超平面构形的结构会变得非常复杂。

Methods: A 3-D coordinate system was designed for skull, based on Frankfurt horizontal plane and analytical geometry method.

以颅骨的耳眼平面为基础定位平面，按解析几何方法设计颅骨的三维空间坐标系。

On depending on author's perception of teaching 《analytical geometry》,raising a warning about the phenomenon of student's neglect of the use of vector in exercise,this essay elucidate the preponderance of vector in solving problems about space.

在中学，解析几何课程主要研究平面上一些点、线的几何位置和几何性质，所涉及的点、直线、曲线均共面，它们都落在坐标系所在的平面内。

The simulation results show that when light wave propagates along the angular bisector of corner angle in metamaterial volume,the electromagnetic focus effect will not exist in the metamaterial volume,although the permittivity and permeability of metamaterial are very small.

仿真结果表明：即便对于εr和μr都很小且无耗的正多边形异向介质柱，当平面光波沿正多边形顶角角平分线方向传播时，在异向介质柱内不会发生电磁聚焦。标签聚焦特性时域有限差分方法异向介质平面光波 Focus charaters FDTD Metamaterials Plane light wave

The common method for obtaining the angle of the plane figure to projection plane is through the right-angled triangle method after getting the double-face projection of the plane figure on the basis of the conception of maximum oblique line.

求平面图形对投影面的倾角，通常需要知道平面图形的两面投影，利用最大斜度线的概念，通过直角三角形法求得。

The relationship between inter-story torsion angle and torsion deformation ratio is deduced base on the rule of irregular plan structures in China tall building technical specification. Considering the inter-story ratio limitation of different performance levels under different earthquake hazard levels, a series of torsion angle demand curves are established and a new method named as Torsion Angle Capacity Spectrum is put forward for the PBSD of irregular plan frame structures.

从现行规范对平面不规则结构的限制条件出发，推导出了结构层间扭转角与扭转位移比的关系式，结合框架结构在不同性能水平下的层间侧移角限值，建立了平面不规则框架结构在不同地震作用水平下的扭转角需求曲线，提出了扭转角能力谱法。

In order to solve the problem that the paths of angular distribution at focus plane and beam spot at image plane can not be measured at the same time,an advanced measurement of optical transition radiation was proposed.

为了解决理论测量中，光学渡越辐射焦平面的空间角分布与像平面的束剖面光路互相影响，难以同时测量，提出了一种新型的光学渡越辐射光学特性的测量方法。

The present invention provides improved cube corner retroreflective articles which exhibit a wide range of retroreflective entrance angularity in at least one plane, and preferably in two or more planes.

一种立体角反光制品，该制品在至少一个平面、较佳地在两个或更多平面存在宽范围的反射入射角度。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了