inflection (inflexion) point

The Algorithm and application of discrete inflection point;

離散型函數拐點算法及應用

8 A note on extreme points and inflection points of rational entire functions;

有理整函數的極值點和拐點的一個注記

2007:the profit turning point for papermaking industry;

2007:造紙業迎來盈利拐點?

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.

作為書報刊產業鏈的重要環節之一,書報刊印刷業已處在一個發展的歷史"拐點",呈現出萎縮趨勢,其中圖書、期刊印刷業的萎縮已經開始。

By using geometric method, a new algorithm is advanced on quick locating for turning points in discrete point set of plane curve.

采用幾何的方法 ,提出一種確定平面曲線離散點集拐點的快速算法 ,該算法結構簡單、計算效率高 ,而且可以快速確定平面參數曲線離散點集的拐點 。

Analyzing and Forecasting on the Emergence Time of China s Secondary Industry Inflexion;

中國第二產業拐點出現時刻分析與預測

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.

設計思想是:在上位機(PC)上進行預處理,計算出數控機床沿軌跡各點的速度,判斷軌跡的連續性,并找出軌跡中的"拐點"和減速點,然后將這些數據傳給下位機(DSP)對機床進行運動控制。

Discussion on the effect of changing mathematic simulation curve inflexion points to the polymerization temperature rising state;

淺析數學模擬曲線拐點變化對聚合升溫反應狀態的影響

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.

用傳統的化學動力學方法討論了溫度對絮凝過程的影響,測定了木質素溶液在不同溫度時被聚氯化鋁鐵(PAFC)絮凝的絮凝沉降曲線,討論了曲線上拐點的意義,并估算出該膠體溶液絮凝時的活化能,它相當于DLVO理論為膠體粒子間的勢能能壘φm,實驗得出φm≈16。

Several sufficient conditions of inflexion point of curve are gained.

給出了曲線拐點判定的幾個充分條件,對比曲線的拐點和極值的判別方法,研究了曲線的拐點、極值點和不可導點之間的關系。

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 ]基礎上的繼續和發展 ,主要對有理 H-樣條曲線的形狀進行分析 ,討論其諸如拐點和奇點的幾何特征 ,給出有理參數平面三次 H-樣條曲線在非退化情況下有拐點的充要條件 ,并證明在區間 ( 0 ,1 )內曲線段無奇點的結論。

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.

對有理C-Bézier曲線進行了形狀分析,得出曲線上含有奇點、拐點和曲線為局部凸或全局凸的、用控制多邊形邊向量相對位置表示的充分必要條件,并討論了權因子變化對曲線形狀圖的影響。

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.

本文完全地討論了平面C-曲線和平面C-Bezier曲線的奇拐點和凸性性質:曲線段為且必為下列情形之一:有一各拐點,兩個拐點,一個尖點,一個二重結點,處處為凸;并給出了相應的用控制多邊形相對位置表示的充分必要條件。