虚圆点实际上是一退化的二次曲线。
铃壳率变化与开花期呈二次曲线。
Boll shell percent age resembled a sigmoid curve with flowering stage.
总产量与灌水量呈二次曲线关系。
The total yield was curve relation with water irrigation maximums.
烟叶吸钾量与施钾量呈二次曲线关系。
The relation between Kuptake of tobacco leaf and potassium levels was a quadratic curve.
二次曲线的准线。
二次曲线为非中心曲线的充要条件及方程表示形式。
The quadratic curve is the necessary and sufficient condition of the noncentral curve as well as the equation's representative form.
但是，不同顺序的四点在决定二次曲线类型存在着差异。
However, when determining the different orders of four points, there is difference existing in the conic section type.
应用二次曲线束理论揭示解二元二次方程组的几何意义。
Apply the theory of pencil of conics to reveal the geometric significance of simultaneous equations of second degree with two unknows.
研究探讨了一种基于平面二次曲线的纯旋转摄像机自标定方法。
In this paper, instead of corresponding image points which are widely used in the literature, corresponding image conics are used to calibrate a rotating camera.
插补计算采用了差分插补法，能对所有的二次曲线进行直接插补。
This CNC system employs difference interpolation method for interpolation calculation, which can directly interpolate all of conic.
具有公共对称平面的二次曲面的交线在该平面上的投影为二次曲线。
It is known that the projection of the intersection of quadrics with common plane of symmetry on this plane is a curve of second order.
二次曲线是计算机图形学和计算机辅助几何设计中的基本体素之一。
Conic curve is a basic element in computer graphics and computer aided geometric design.
本文详细讨论了实二次曲线交点的求解问题，推导出了一系列公式。
This paper discussed finding intersection points of real conic in detail and offered some formulas.
比较了发电费用曲线为二次曲线时新的定价方式与已有定价方式的关系。
When the generation cost function is quadratic curve, the new bargaining is compared with the former one.
文章利用射影几何方法及配极原理给出二次曲线中点弦存在性定理的证明。
In this paper, the existence theorem of midpoint chord of quadratic curve, as well as its proof, is given via methods of projective geometry and polarity principle.
流量与调节锥轴向移动距离呈二次曲线关系，即流量调节具有非线性性质。
When the probe with a shape of owl, the relation between the flow rate and the regulating displacement is quadratic, which means the injector has a nonlinear regulating character.
二次曲线中点弦存在性问题的探讨，对二次曲线的研究有着及其重要的意义。
Problems about the existence of midpoint chord of quadratic curve is worthy of discussing in the study of the theories about quadratic curve.
同时它还能精确表示圆弧、椭圆弧等二次曲线，推广到空间即可以表示旋转曲面。
Also the curves can express the circle arc and ellipse arc and can construct rotate surfaces.
产量与降水量和降水日数均为二次曲线关系，与降水量的相关系数高于降水日数。
Crop yield had a quadric correlation with the rainfall and rain days. which correlation coefficient with rainfall was higher than that with rain days.
通过构建环境库兹聂兹二次曲线，依托计量软件，确定拐点出现的时间和经济基础。
Construction of the environment through the Environmental Kuznets Curve, relying on metering software to determine the inflection point of time and economic base.
给出仿射坐标系下场景中平面与像平面的单应关系、绝对二次曲线及其图像的表示。
This paper first presents the homography between a plane in the scene and a plane of the image, and the absolute conic in space under an affine coordinates.
研究结果表明，混凝土早期自收缩大小与相应的极限拉伸应变具有显著的二次曲线关系；
Research results show that the relationship between autogenous shrinkage at early ages and ultimate tensile strain can be approximately figured by a quadric equation.
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。
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.
通过对四种二次曲线截面的柔性铰链的理论计算和有限元分析，比较分析了它们的力学特性。
Theory calculate and finite element method to symmetric conic-section flexure hinges is used to compare and analyze their dynamics characteristic.
利用《高等几何》的观点、方法解决《解析几何》中的二次曲线的切线的存在性与求法问题。
To solve the problem about determinant and solution to tangent line of curve of second order in Analytic Geometry with viewpoint and methods of Higher Geometry.
结果表明，随着海拔的增加，间隔子长度、分株密度、分枝角度和分枝强度呈二次曲线变化。
The results showed that the change patterns of spacer length, ramet density, branching intensity, and branching Angle of Duchesnea indica were in a quadratic curve when the elevation increased.
举例编制了椭圆轮廓上球形螺纹的宏加工程序，此方法适用于所有二次曲线的球形螺纹加工。
Various NC programs to machine sphericity thread form based on ellipse contour are developed using macro programs. This method can be used for the contour machining of all types of conic.
利用拉格朗日乘子法求解二次曲线和二次曲面之间的最小距离，给出了曲线与曲面相切的条件。
With the Lagrange multiplier method, the minimum distance of the center of a circle and a quadric surface was provided and the tangency condition of curve and surface was given.
论述了基于曲线合成插补理论的反向合成插补理论，研制出直线和二次曲线切割加工控制程序。
A backtracking interpolation theory based on the synthetic interpolation theory was expounded, a controlling program used to cutting straight line and quadratic curve has been developed successfully.
论述了基于曲线合成插补理论的反向合成插补理论，研制出直线和二次曲线切割加工控制程序。
A backtracking interpolation theory based on the synthetic interpolation theory was expounded, a controlling program used to cutting straight line and quadratic curve has been developed successfully.
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