conic section

noun

1. 圆锥截线；二次曲线
   a shape formed when a flat surface meets a cone with a round base

1. 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。
2. By using transformation thought, this paper obtains the focus chord of all kinds of conic section through analyzing a sample in conic section teaching.
   利用变换思想，对圆锥曲线教学中的一道例题进行分析，得出了各种圆锥曲线的焦点弦，并引伸其结论，将圆锥曲线的焦点弦变换为中心弦。
3. Exemplifying the Problem-Solving Techniques for the Sampling Codomain of the Conic; 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。
4. To Classify the Conic Section with Primary Alternation; A branch and bound algorithm for a kind of indefinite quadratic programming
   浅谈用初等变换对二次曲线进行分类一类不定二次规划问题的分枝定界法
5. 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。
6. Research on Conic Section Comparison Integral Interpolation Algorithm of Numerical Control System
   数控系统二次曲线比较积分插补算法研究二次采油体积波及系数
7. A fixed reference point on the concave side of a conic section.
   圆锥截面凹面的固定参考点。
8. The Research Of The Curve Formed By The Conic Section Rolled On Line
   圆锥曲线沿直线滚动所形成曲线的研究
9. The methodological beauty and the logical beauty of conic section reflect the internal rational beauty;
   圆锥曲线方法美、逻辑美，是深层次数学美的内在理性美的反映；
10. Three expressions of conic section and central force problem
    圆锥曲线的三种表示和有心力问题
11. The Demonstration of the Conic Section Is an Envelope of Family of Straight Lines
    圆锥曲线是直线族的包络的证明
12. A Note on A Method of Reducing Equation of Conic Section
    《化简圆锥曲线方程的一种方法》的注记
13. The Flow Rate of Shaft Spillway with Vortex Flow Intake and Hydraulic Characteristics of Vortex Camber and Conic Tube Section
    旋流式竖井溢洪道的过流能力及蜗室与锥形渐缩段的水力特性研究
14. This paper takes Conic Section ′ S teaching as an example and discusses how to make most use of the textbook to develop the student ′ thinking ability in class.
    本文以圆锥曲线的教学为例，谈谈如何充分挖掘教材、利用课堂主渠道，来培养学生思维能力。
15. If two ordinary conic sections take the position of one conic section inside another or one across another, the problem of the determination of the center of homology and the parameter of homology needs further study.
    两一般二次曲线成内离和相交情况下，透射中心及透射参数如何确定的问题尚待研究。
16. This essay discusses the pencils of lines resolution and the trajectory of what the projective pencils of lines composes, and tries to find a method for the point intersection between conic section and straight line.
    本文从射影观点出发讨论圆锥曲线的线束分解和此射影线束构成的轨迹，并提出求圆锥曲线与直线交点的一种方法。
17. The tangent velocity along the radius distribution in the level rotary flow tunnel can be considered as the combination swirl distribution, and the axial flow velocity can be the conic section distribution with the maximum value nearing one side of the wall.
    水平旋流洞切向流速沿径向的分布可以看成组合涡分布，轴向流速为最大值靠近壁面一侧的二次曲线分布。
18. Based on introduction of knowledge about algebraic operation among line seg-ments, it is discussed how to diagram the conic section and its evolute, some non-conic section using compasses and straightedge in this paper.
    在介绍用规尺进行线段之间代数运算知识的基础上，讨论如何利用规尺作图法作出圆锥曲线及其渐屈线、某些非圆锥曲线的图象。
19. Magnetic Field Intensity Distribution in the Space Surrounding a Conic Section Carrying Current
    载流圆锥曲线空间磁场的分布
20. The optical fiber diffraction grating Bragg wave length demodulation algorithm revises which based on the conic section
    基于二次曲线修正的光纤光栅Bragg波长解调算法
21. On the Teaching of Second Definition to Conic Section
    关于圆锥曲线第二种定义的教学
22. Conic section road border model put forward to the form characteristic of the border of road, the ones that have realized to identification line of lane which are followed in real time.
    针对道路边界的形状特征提出的二次曲线道路边界模型，实现了对车道标识线的实时跟踪。
23. A Probe into existing Problem of Conic Section
    圆锥曲线存在性问题的探索
24. Determining the parameters of quadratic surface or conic section by optimization
    用最优化方法确定二次曲面和曲线的参数
25. Four Propositions and Their Applications of a Straight Line and a Conic Section Being Tangent
    直线和圆锥曲线相切的若干命题与应用
26. Conic section is taken as an example to unearth the beauty of mathematics in from the following three aspects: 1. the language beauty of conic section reveals the external formal beauty;
    首先，以圆锥曲线教学为案例来挖掘中学数学教学中的数学美，具体从三个层次探讨①圆锥曲线语言之美，是数学美的外在形式美具体展现；
27. Conic section is one of important parts of high school mathematics curriculum, and it is the key content in college entrance examination each year.
    圆锥曲线是高中数学课程重要的组成部分之一，也是每年数学高考考查的重点内容。
28. The writer analyzed the specific factors affecting secondary vocational school students 'understanding of conic section and probed the teaching mode of improving and teaching strategies for effective teaching research and practice of the concept of conic section.
    笔者通过分析影响中职生圆锥曲线认知的具体因素，进一步探究增进学生圆锥曲线概念理解的教学模式，从而为开展有效的圆锥曲线概念教学研究和实践提供理论支撑和教学策略。

noun

1. (geometry) a curve generated by the intersection of a plane and a circular cone

   Synonym:    conic