二次曲线

There is possibility to set homology constriction between conicsections of different kinds of position.

所有二次曲线之间存在建立透射结构的可能性。

Regresive analysis showed that the quadratic curve correlation existed between the biological and chemical characteristics and the time of fermentation and aging.

烤烟发酵过程中生物和化学特性变化与发酵时间之间的关系符合二次曲线相关关系，首次得到了两者之间的回归方程。

According to the characteristic of the data processing, a interferogram regrouping error correction algorithm is designed, and devise a method to correct the sampling position error of the central dark fringe.

通过对其数据处理流程特点的分析，设计了一种归一化算法，对由干涉图重组时产生的误差进行了校正，并对在数据采集过程中干涉图的中心暗纹位置的采样误差进行了二次曲线拟合校正。

This paper researches the construction of clothing band collar and grown-on collar and analyses the interrelated relationship of construction by means of the image principle among cast planes of cast geometry and the direct reflective correspondence nature of square curve.

本文运用射影几何中射影平面间的仿射原理及二次曲线的直射对应性质，研究立领和连身立领的结构组成，分析其经构内在相互关系，最终从理论上剖析了两类衣领的结构设计原理，在实践上提供了两类衣领精确而实用的设计方法。

Do some research to find the name of this conic and the how the words vertices, foci, centre and directrix relate to this shape.

做些搜索去找出这个二次曲线的名称以及顶点，焦点，中心点以及准线是怎样与这个图形有关的？

The growth dynamics of leaf length on stem and tiller could be described with a logistic model, leaf width with conic equation, and leaf shape with exponential function and quadratic equation. The effects of nitrogen and water conditions on leaf growth were quantified by the effective values of leaf nitrogen concentration and water content.

模型采用Logistic方程描述了水稻主茎及分蘖叶片随生长度日的动态伸长过程；利用二次曲线描述了叶宽随GDD的动态变化过程；分别用幂函数和一元二次方程描述了叶形的动态变化过程；另外，以叶片氮素和水分因子分别描述了不同水氮水平对叶片形态建成过程的定量影响。

Theory calculate and finite element method to symmetric conic-section flexure hinges is used to compare and analyze their dynamics characteristic.

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。

Stem and fructification , found length of scape and rachis, length and diameter of fruct accorded with conic.

记录天麻花苔和果实的发育过程，发现花茎、花序轴的伸长以及果实长度、直径的生长过程均呈二次曲线趋势。

The results show that the density of gritstone is decreased gradually as the temperature increasing; so that it can be ignored; the longitudinal wave velocity is linearly decreased when the temperature increasing, and decrease rate of it follows the law of conic; R is one temperature point, which makes the law of tensile strength of gritstone after high temperature follows the law of parabola; and the maximal tensile strength appears when the operative temperature is R. After the temperature is higher than 700 ℃, tensile strength is small and change range is small when the temperature is increased.

结果表明，高温后粗砂岩的密度随试验温度的升高减小幅度很小，几乎可忽略不记；高温后试件中纵波波速的传播随温度升高基本呈线性降低，而减小率呈二次曲线规律变化；存在一个温度点R，使高温后试件的抗拉强度呈开口向下抛物线关系变化，且在R温度作用后试件抗拉强度达到最大；当试验温度大于700 ℃后，试件的抗拉强度变得很小，且当温度升高时变化幅度也很小。

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。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐