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多边形的内角
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     CUTTING THE GENERAL POLYGONS
     一般多边形的切割
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     TRIANGULATION OF A POLYGON AND ITS APPLICATION
     多边形的三角剖分及应用
短句来源
     The Craft Analysis Research of Boring Hole and Cutting Interior Angle
     镗孔倒内角工艺的分析研究
短句来源
     The Inequlity for the weighted sum of cosine of interior angles in a convex n polygon.
     凸n边形内角加权余弦和不等式
短句来源
     Here,according to the classical theory of plastic deformation of the single crystal and slip characteristic of the face centered cubic with zincblende structure crystal,the reasons why the polygons came into being were clarified. The polygons'internal angle must be 60° or 120°.
     文中从经典的晶体范性形变理论和面心立方闪锌矿结构晶体所具有的滑移特性出发,阐明了出现在CZT(111)Cd面的多边形的形成机理,其内角必为60°或120°。
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An interferometric method is designed for testing the highly precise regular cube, from which a corner prism reflector is cut. The testing scheme and principle are introduced and some related issues such as parameters selection and attainable accuracies are investigated.

锥体棱镜作为各种测距仪的附件,属高精度光学元件,且其精度高低对测距仪测距精度影响很大。不少生产厂家在加工中普遍采用先加工出一个正立方体,而后在顶角处斜切出锥体棱镜的加工方法。本文详细讨论了用干涉法检测正立方体各项质量指标,特别提出了利用封闭多边形内角之和恒定的原理消除干涉系统的系统误差,从而使对二面直角的测量可达极高精度。

A graph-based algorithm for generating polygons′ topological relationships in GIS automatically is presented in this paper. The algorithm needs only a graph′s topological information, avoids computing and comparing the polygons′ interior angles. The algorithm speeds up the generation of polygons′ topological relationships by taking some effective measures according to the graph′s topological features. Finally, an actual example is also shown in the paper.

本文提出了一个基于图的多边形拓扑关系自动生成算法和实例。该算法只需利用图中弧与多边形的拓扑信息,避免了多边形内角的计算与比较,算法中根据图的拓扑特征采取有效的策略,加快了多边形自动生成的速度。

A methodology on how to deal with AutoCAD 2-D graph for meshing is discussed .The method of judging polygon annular direction is presented,by which we can make the outer ring round in anticlockwise and make the inner ring round in clockwise.Methods of calculating polygon angle,testing node inclusion are proposed.At last,this paper discusses how to pick up the information of entities and sequence them in annular link.The paper chiefly discusses the data structure and arithmetic of above-mentioned methods....

A methodology on how to deal with AutoCAD 2-D graph for meshing is discussed .The method of judging polygon annular direction is presented,by which we can make the outer ring round in anticlockwise and make the inner ring round in clockwise.Methods of calculating polygon angle,testing node inclusion are proposed.At last,this paper discusses how to pick up the information of entities and sequence them in annular link.The paper chiefly discusses the data structure and arithmetic of above-mentioned methods.

讨论了在AutoCAD上进行二维有限元网格划分时对图形的一些处理 ,包括判断多边形内外环的走向 ,使外环成逆时针走向 ,内环成顺时针走向 ;并提出了简便的求多边形夹角 (外环夹角指多边形内角 ,内环夹角指多边形外角 )和节点包含性测试的方法 最后讨论了如何从DXF文件中提取直线、圆以及圆弧段信息 ,并把这些信息形成有序的边界环形链表 着重讨论了实现它们的数据结构和算法

 
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