quadratic curve

The methods of solving tangent plane equations of quadratic surface and tangent equations of quadratic curve

一种求二次曲面切平面及二次曲线切线方程的方法

The nitrogen application amount had a positive linearity correlation with spike number while a quadratic curve or negative linearity correlation was existed between the ratio of basic to topdressing and spike number.

施氮量与单位面积穗数呈线性正相关，氮肥基追比与穗数呈二次曲线或线性负相关，专用小麦不同追施氮肥时期处理均三叶一心期追施氮肥穗数最多。

But the quadratic curve can be used only in condition when each X-coordinate of the points sequence mapping to only one Y-coordinate, so it can't be used in fitting closing curve.

但二次多项式只能拟合X坐标与Y坐标之间成函数关系的点序列，无法拟合闭合曲线。

The pencil of plane quadratic lines is the foundation for studying plane cubic curve and hig-her plane curves.

平面二次线束是研究平面三次代数曲线和高次曲线的基础。

Feedback control is a parameter self tuning fuzzy controller and the burn through point is calculated by quadratic curve method.

反馈部分为参数自调整模糊控制器，终点的计算采用二次曲线拟合法。

There were linear function relationships of grain weight with daily mean temperature and daily range of temperature during filling period. The relationship of the amount of precipitation with the grain weight was quadratic curve function.

灌浆期间的日平均气温和气温日较差与粒重为线性关系，降雨量与粒重则呈二次曲线关系。

On a Tangent Line of Quadratic Curve By Only a Ruler

一根直尺作二次曲线切线的问题

Discriminant of Position Relationship between an Ellipse and a Quadratic Curve

平面椭圆与二次曲线间位置关系的判别式

The Choose of Auxiliary Lines of Polar Point within the Quadratic Curve In the Polar Transformation

配极变换中极点在二次曲线内的辅助线的选取

Polynomial, transcendental function, new quadratic curve, B-spline and NURBS have been used in expression of hull molded line, trapezoidal method, Simpson method have been used in static calculation.

在船体型线的表达方面有多项式、超越函数、新二次曲线、B样条函数、非均匀有理B样条函数等。

In addition, research was made on 6 types of arch configuration such as three center circle, logarithm spiral curve, parabola, hyperbola, ellipse and the general quadratic curve.

本文分别对三心圆、对数螺旋线、抛物线、双曲线、椭圆和一般二次曲线六种体型进行了研究。

In order to describe this phenomenon, we characterize the overall dose-response relationship with a piecewise function that consists of a quadratic curve which is assumed to be U-shape curve and another quadratic curve at high dose levels.

因此我们这里用两个二次函数组成的分段函数构成了这种毒物兴奋效应现象的剂量&反应模型，其中较低剂量水平下的二次函数是U形曲线。

The effect of temperature on search rate ( a) and handling time ( Th) can be described by using the quadratic curve.

温度对瓢虫的捕食效应具有显著的影响，寻找效率（a）和处置时间（Th）与温度之间呈二次函数关系。

The Equivalence of Discrete Logarithms between Elliptic Curve and Real Quadratic Function Field

椭圆曲线与实二次函数域的DLP等价

Quadratic Curve in Higher Geometry

高观点下的二次曲线