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- A ratio describing the shape of a conic section. 描述圆锥曲线部分形状的比率。
- A fixed point whose relationship with a directrix determines a conic section. 焦点一个与准线的关系决定圆锥形状的定点
- Conic sections and quadric surfaces. 二次曲线与二次曲面。
- The fixed curve traversed by a generatrix in generating a conic section or a cylinder. 准线穿过产生圆锥部分或圆柱的母线而形成的固定曲线
- A conic section whose plane is not parallel to the axis, base, or generatrix of the intersected cone. 圆锥的一部分，其切面既不平行于轴和基面，也不平行于圆锥母线
- A conic section whose plane is not parallel to the axis,base,or generatrix of the intersected cone. 圆锥的一部分，其切面既不平行于轴和基面，也不平行于圆锥母线
- According to the fUndamental theorem of coniC In projective geometry any five points can decide one conic section. 在射影几何中，二次曲线定理告诉我们任意五点可以决定一条二次曲线。
- Motion of planets and comets in conic sections; Kepler's laws. 在锥截面上的行星与彗星的运动;开普勒定律。
- The ratio of the distance of any point on a conic section from a focus to its distance from the corresponding directrix. This ratio is constant for any particular conic section. 离心率二次曲线上任何一点到焦点的距离与到准线的距离之比对任一特定二次曲线来说，这个比值都是一个常数
- Given a hexagon inscribed in a conic section, the three pairs of the continuations of opposite sides meet on a straight line, called the Pascal line. 已知一个六边形内接于一条圆锥曲线，那么这个六边形对边的交点位于同一条直线上。
- The ratio of the distance of any point on a conic section from a focus to its distance from the corresponding directrix.This ratio is constant for any particular conic section. 离心率二次曲线上任何一点到焦点的距离与到准线的距离之比对任一特定二次曲线来说，这个比值都是一个常数
- The platonic school's most significant discovery was the conic sections. Plato学派的最重要发现是圆锥曲线。
- His chief work was on the conic sections but he also wrote on other subjects. 他的主要著作是关于圆锥线的，但也写过其他方面的著作。
- Key words: Unity of geometry and algebra, conic sections, latus rectum. 关键词：数形合一，圆锥截痕，正焦弦。
- A conic section. 圆锥部分
- After coordinate system were reconstructed,the horizontal and vertical axes of the modeled lens surface were calculated,and the best curve fitting to any conic section was determined. 转换坐标系后,将晶状体前表面水平径线和垂直径线各点做圆、椭圆、抛物线、双曲线等的曲线拟合。
- This article is to illustrate that the conic section is an envelope of family of straight lines, thus we discover the internal relations between the conic section and the solution of differential equation. 对圆锥曲线是直线族的包络进行了证明,揭示了圆锥曲线与微分方程的解之间的内在联系。
- Conic sections of different kind are projection graph, in which there are possibility to set perspective construction. 所有二次曲线皆为射影形,它们之间存在建立透射结构的可能性。
- GPLconx - GPLconx is an educational visualization tool that allows exploration of lines and conic sections in three models of 2-D hyperbolic geometry. GPLconx是一个教学可视化工具,可以观看2D双曲线几何体的三种模型的线条和二次曲线部分。
- Rsstriction of3- D fan blade governing the form of several conic sections is performed by using CG theory. The blade accuracy is therefore improved and the development simplified. 对给出的有限个锥形截面表示的三元流叶片，利用计算机图形学理论重新在三维空间进行了重构，从而提高了叶片展开的精度，简化了展开方法。
