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Automatic identification method of conics is studied based on the curve geometric invariants.

讨论了基于二次曲线不变量的圆锥曲线特征自动识别方法。

Conics or smooth 3D B-spline curve can be drawn freely and quickly.

并在点云表面高效地绘制出二次曲线或者平滑的B样条曲线。

In order to recognize the 2D shapes, we proposed a set of perspective invariants of a pair of coplanar conics in this paper, we suggest a perspective invariant representation of general planar curve based on ellipse, and give an algorithm using the invariants and the representation to recognize 2D shapes.

为了实现二维形状的透视投影不变性识别，本文推导出了一种共面二次曲线对的透视投影不变量，提出了一种基于椭圆的平面曲线的透视不变性表示方法，并且给出了用该不变量和不变性表示方法实现二维形状识别的算法。

Many subdivision schemes have been proposed in the recent three decades, however, most of them are not capable of both reproducing families of curves widely used in Computer Graphics such as conics, and controlling the shape of the limit curve by a tension parameter.

近三十年来已有多种细分方法被相继提出，然而大多数细分方法不能既生成在计算机图形学中广泛应用的特殊曲线，例如圆弧曲线，又存在一个松弛参数能够调整极限曲线的形状。

A manner is presented with which complex curves including polylines, conics or free curves can be precisely represented, and corresponding algorithm is designed. The curve can be C〓 or C〓 continuous. So all type of curves and their composites can be represented in NURBS. A deep research is paid to skinning surface. Different forms of the formation of knots vector are applied to different section forms.

对由多段直线、二次曲线、自由曲线进行任意组合的这类复杂曲线，提出了一种用一条NURBS曲线进行精确表示的方法，并设计了相应的算法，曲线段连接处根据需要可为一阶连续或形成尖点，从而使所有类型的曲线及由它们任意组合所生成的复杂曲线统一用NURBS表示。

In this paper, a new methodology was proposed based on the connected convex curve searching and ellipse fitting.

本文提出一种基于凸性连通分支搜索结合曲线拟合的多椭圆检测算法。

Firstly, the characteristic points of the parallel section curves are extracted, and the characteristic points are connected to construct feature curve.

然后在上述区域划分的基础上，提出结合树形结构利用数据点的法矢量对区域内数据点群完成空间分割，从而形成具有单一表面特征的面片。

The connected curve equation after spreading connected joint of taper container are derived,the new blanking method with computer is put forward.

导出了圆锥形容器接管交线在展开接管表面后的曲线方程，提出了用计算机绘制其交线，即放样下料的新方法。

Dat document, the free curve which connected by the multiple valid points was formed.

dat文件，形成由多个数据点连接的自由曲线，依次读取第2 层、第3 层、第4 层至第87 层，形成兔股骨内、外轮廓的堆叠图。

MethodsAfter oral administration of Wuchai Particles(2 g/kg) for the mice , the serum was collected at different time points .The components in the Wuchai Particles and serum were analyzed by HPLC to monitor the changes of the schizandrin in serum so as to draw the curve of concentration connected with time .

方法小鼠灌胃给予五柴颗粒2 g/kg，在不同的时间点采血样，用高效液相色谱方法分析五柴颗粒和血清样品中五味子甲素成分，测定五味子甲素浓度的经时变化，绘制浓度-时间曲线图。

Now she was hungry and angry.She began to smoulder.

现在她又饿又气，她开始流露难以抑制的怒火。

You have placed our iniquities before You, Our secret sins in the light of Your presence.

诗90：8 你将我们的罪孽摆在你面前、将我们的隐恶摆在你面光之中。