Position relationship problem between two quadratic curves is usually discussed in collision detection problem between two coplanar objects.
平面实体间的碰撞检测中，经常需要讨论二次曲线间的位置关系。In this paper, two theorems on chord at contact equation of a nonsingular conic have been proved.
证明了非退化二次曲线切点弦方程的两个定理。Quadratic correlation was also observed between the yield and the water productivity of rice.
水稻产量与水分利用率具有显著二次曲线相关性。A conic primitive based intermediate pattern and its data format of electron beam lithography are defined.
在一种新的电子束曝光机二次曲线单元图的基础上定义了一种中间图形数据格式。Structure stability coefficient decreases with the increase of the initial pier deflection according to parabola curves.
结构稳定系数随墩顶初始横向偏位的增加而呈分段二次曲线规律减小；Quadratic splines need at least 3 points.
二次曲线样条至少需要3个点。According to characteristic of concrete box water bridge thermal boundary, temperature conic distributing is given by solar radiation.
根据混凝土箱形输水桥的温度边界特点，给出了箱形输水桥日照温差二次曲线分布形式；The relation between Kuptake of tobacco leaf and potassium levels was a quadratic curve.
烟叶吸钾量与施钾量呈二次曲线关系。the knots of the quadratic curve were determined by minimizing the second derivative vector of the curve.
两个相邻数据点间的节点区间由两条二次曲线确定。