查询词典 concave polygon

Use of the C language arbitrary polygon and complex Boolean operation perfunctory process and dynamic show.

利用C语言实现了任意复杂多边形的并交差布尔运算及动态过程显示。

The characteristics of several algorithms of automatic support generation and an algorithm of automatic support generation of FDM based on polygon Boolean operation have been presented.

简述了几种FDM支撑自动生成算法的特点，提出了一种基于多边形布尔运算的FDM支撑生成算法，并构建了一种密集与疏松相复合的支撑路径规划方法。

Based on the analysis of the characteristics of the compensation directions for boundary curve s in rapid prototyping direct slicing, a new method, which can determinate the compensation direction by converting the boundary curve to beeline polygon,is proposed.

在分析快速成型制造中直接切片真实边界曲线补偿方向特点的基础上，提出了一种将曲线边界转化为直线多边形进行补偿方向判定的方法，并阐述了该判定方法的几何意义。

Based on the analysis of the characteristics of the compensation directions for boundary curves in rapid prototyping direct slicing, a new method, which can determinate the compensation direction by converting the boundary curve to beeline polygon, is proposed. The geometric signification of the polygonal method is demonstrated.

在分析快速成型制造中直接切片真实边界曲线补偿方向特点的基础上，提出了一种将曲线边界转化为直线多边形进行补偿方向判定的方法，幷阐述了该判定方法的几何意义。

That is, the holes areas will be of opposite sign to the bounding polygon area.

那就是，这个洞区将相反的符号来包围的多边形面积。

The Cut Ear button will start to triangulate the polygon, the triangles composed

在割掉耳朵按钮将开始三角多边形，三角形组成

In Figure 5.4, an instance of Point may be part of a polygon or may be the center of a circle, but it cannot be both.

在图5.4中，point的一个实例可以是多边形的一部分，也可以是一个圆的圆心，但不能同时充当这两种角色。

In this paper,the B-spline curve is supposed as boundary curves,when they are in two paralled plane and two arbitrary plane,the condition about the control vertex of characteristic polygon when the ruled surface is developable are gained,solved the designing problem of degree and degree B-spline curve .Throughing (2,3) degree and (2,2) degree B-spline ,we haveproved the validity and utility of this method.

本文用两条B样条曲线作边界曲线，当它们位于两平行平面上和两任意平面上时，研究得到了由它们形成的直纹面为可展面时它们的特征多边形顶点满足的条件，解决了(n，n+1)次和次可展B样条曲面的设计问题，然后以(2，3)次和(2，2)次B样条曲面为构造实例，证明了该算法的正确性和实用性。

On the basis of Aumann,Meng Ya-qin and Ye Zheng-lin[13],Cuan-ying and Xue Ji-jun[16] have gained some conditions about characteristic polygon of the ruled surface,they used two Bezier curves in paralled plane as boundary curves to get ruled surface.

国内孟雅琴、叶正麟、爨莹、薛继军等人在Anmann方法的基础上，用位于两平行平面上的两条Bézier曲线作边界曲线，形成直纹面，并得到了它们可展时特征多边形顶点应该满足的条件。

By contrast, linear texture filtering results in an image where the checkerboard colors vary smoothly across the polygon.

相比之下，线性纹理过滤得到的图像中棋盘的颜色会沿着多边形逐渐改变。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。