The Algorithm and application of discrete inflection point;
离散型函数拐点算法及应用
8 A note on extreme points and inflection points of rational entire functions;
有理整函数的极值点和拐点的一个注记
2007:the profit turning point for papermaking industry;
2007:造纸业迎来盈利拐点?
As one of their main elements,the print industry of book and newspaper and magazine is in a historical turning point,which the industry has a shrinking tendency.
作为书报刊产业链的重要环节之一,书报刊印刷业已处在一个发展的历史"拐点",呈现出萎缩趋势,其中图书、期刊印刷业的萎缩已经开始。
By using geometric method, a new algorithm is advanced on quick locating for turning points in discrete point set of plane curve.
采用几何的方法 ,提出一种确定平面曲线离散点集拐点的快速算法 ,该算法结构简单、计算效率高 ,而且可以快速确定平面参数曲线离散点集的拐点 。
Analyzing and Forecasting on the Emergence Time of China s Secondary Industry Inflexion;
中国第二产业拐点出现时刻分析与预测
It is to calculate the speed of machine tool on PC,and find out the inflexions and the slowdown points,then transmit these datas to the DSP to control the machine tool.
设计思想是:在上位机(PC)上进行预处理,计算出数控机床沿轨迹各点的速度,判断轨迹的连续性,并找出轨迹中的"拐点"和减速点,然后将这些数据传给下位机(DSP)对机床进行运动控制。
Discussion on the effect of changing mathematic simulation curve inflexion points to the polymerization temperature rising state;
浅析数学模拟曲线拐点变化对聚合升温反应状态的影响
Moreover,the flocculation settlement curves of the lignin locution were determined at deferent temperatures under the condition of the polyaluminum ferric chloride flocculation,the sense of the inflexion point of the curve was discussed,and the acaivation energy of the colloid solution flocculatiov was eltimated,which corresponds to the potential-energy(Φm) between sol particles accordin.
用传统的化学动力学方法讨论了温度对絮凝过程的影响,测定了木质素溶液在不同温度时被聚氯化铝铁(PAFC)絮凝的絮凝沉降曲线,讨论了曲线上拐点的意义,并估算出该胶体溶液絮凝时的活化能,它相当于DLVO理论为胶体粒子间的势能能垒φm,实验得出φm≈16。
Several sufficient conditions of inflexion point of curve are gained.
给出了曲线拐点判定的几个充分条件,对比曲线的拐点和极值的判别方法,研究了曲线的拐点、极值点和不可导点之间的关系。
We analyze the geometric features like cusps and inflection points in the curve and calculate the cusps and inflection points, then give a necessary and sufficient condition to the inflection points.
本文是在文 [1 ]基础上的继续和发展 ,主要对有理 H-样条曲线的形状进行分析 ,讨论其诸如拐点和奇点的几何特征 ,给出有理参数平面三次 H-样条曲线在非退化情况下有拐点的充要条件 ,并证明在区间 ( 0 ,1 )内曲线段无奇点的结论。
In this paper the authors analyze the shape features like singularities,inflection points and local or global convexity of rational C-Bézier curve,then give the necessary and sufficient conditions for this curve having one or two inflection points,or a loop,or a cusp,or being local or global convex in terms of the relative position of its control polygons′ side vectors.
对有理C-Bézier曲线进行了形状分析,得出曲线上含有奇点、拐点和曲线为局部凸或全局凸的、用控制多边形边向量相对位置表示的充分必要条件,并讨论了权因子变化对曲线形状图的影响。
In this paper we discuss the distribution of singular points and inflection points on a planar C-Bezier curve in details, and give the necessary and sufficient conditions for having one or two inflection points, or a loop, or a cusp, or none of the above points on the curve in terms of their control polygons.
本文完全地讨论了平面C-曲线和平面C-Bezier曲线的奇拐点和凸性性质:曲线段为且必为下列情形之一:有一各拐点,两个拐点,一个尖点,一个二重结点,处处为凸;并给出了相应的用控制多边形相对位置表示的充分必要条件。