根据飞行器椭圆弹道的性质、飞行器再入条件、球面几何和不动点原理给出了理想弹道的计算算法。
Baced on the properties of elliptical trajectory, the reentry conditions of the vehicles, spherical geometry, and the fixed-point theorem, an algorithm for the ideal trajectory is proposed.
根据“球面上圆构造椭圆锥面”的原理，设计了球内接三通接头。
According to the principle of constructing elliptical conical surface by the circles on a sphere, a T-joint inscribed in a sphere is designed.
本文利用移动球面法证明了一类半线性椭圆型方程组正解的存在性与不存在性。
Existence and nonexistence of positive solutions for a class of semilinear elliptic systems are considered via the method of moving spheres.
球面上共焦点之椭圆、双曲线，在球心投影中仍投影成共焦椭圆、双曲线。
The cofocal ellipse and hyperbola of spherical surface will also be projected into the cofocal ellipse and hyperbola in gnomonic projection.
总结了谱方法椭圆问题与双曲问题中的研究进展 ；论述了球面坐标和极坐标下的谱方法 ；
The development of spectral method on elliptical and hyperbolic problems is summarized, and spectral method under sphere coordinates and polar coordinates is touched too.
本文阐述了椭圆孔及圆球面成形原理，介绍了利用万能铣床加工椭圆孔及圆球的方法。
The forming principle of elliptical hole and the ball surface is illustrated in this paper, and it also introduces the processing method to elliptical hole and the ball surface with universal miller.
在上述球面反射镜上，在其和椭圆的长轴相交处开一小孔，即为灯口。
Small holes are arranged on the spherical reflecting mirror and the crossing portion of the spherical reflecting mirror and the long shaft of the ellipse, and the small holes are lamp holes.
广州自行车馆为2010年亚运会的主要比赛场馆，屋盖采用局部双层的单层椭圆球面网壳结构。
Guangzhou Bicycle Stadium is a main venue for the 2010 Asian Games, the roof of which is a single-layer ellipsoid reticulated shell with partial double layers.
广州自行车馆为2010年亚运会的主要比赛场馆，屋盖采用局部双层的单层椭圆球面网壳结构。
Guangzhou Bicycle Stadium is a main venue for the 2010 Asian Games, the roof of which is a single-layer ellipsoid reticulated shell with partial double layers.
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