| 1. | New exploration of outspreading in irregular surfaces
扭变曲面展开的新探 |
| 2. | Creating technology of carving work based of fractal and surface expandedness
基于分形和曲面展开的雕刻作品生成技术 |
| 3. | Modified surface spreading four - node element in one - step inverse forming simulation and its application in automobile front fender
局部减缩积分曲面展开单元在某汽车翼子板一步成形模拟中的应用 |
| 4. | This paper deals with the role and the prerequisite of establishing the computer - aided drawing system by means of unfolding sheet metal in modern production
本文阐述了建立曲面展开计算机辅助绘图系统在现代生产中的作用与必要性。 |
| 5. | 4 . the deformation distributed in the developed surface is analyzed , and a lagrange deformation displacement is proposed to describe the deformation of an element
4 、分析了曲面展开单元中的变形情况，提出了表示单元变形的lagrange位移法。 |
| 6. | This thesis , from different analytical points of view , proposes three algorithms for the minimum distances between convex nurbs surfaces and general nurbs surfaces respectively
本文从不同的分析角度，分别就凸曲面和一般曲面展开研究，给出了nurbs曲面间距离求解的几种算法，解决了最为复杂的两参数曲面间的最短距离求解问题。 |
| 7. | The major works of this paper include the following aspects : 1 . a review of the researches on curved surfaces development is presented . the development methods are classified based on the strategies adopted
本文的工作可概括为以下几个方面： 1 、总结分析了近十余年来有关曲面展开技术研究的文献，并对各种技术方法进行了分类。 |
| 8. | This paper profoundly studies surface developablity on new a set of curves in the field of cagd and pays attention to the methods of developabe surface modeling and surface development on c - b zier curve . the research achievements and main contents are as follows : 1
完成的主要研究内容和结果如下：一、回顾了可展曲面的概念和性质，系统叙述了cagd中可展曲面造型和复杂曲面展开方法的发展和理论及应用研究成果。 |
| 9. | Finally , when a 00 , the limt situations for the developable modeling and surface development above are all disscussed and compared with those on bezier curve . the programs of the above methods und algorithms are developed , which shall be used in the system of developable surface modeling for cad / cam
Zier曲线上可展曲面造型方法和曲面展开算法，均给出了当0时的极限，并与b ? zier曲线的情形作了分析和比较。这些方法和算法均应用于实例在计算机上得以实现。 |
| 10. | The sheet metal work pieces are first divided into several groups such as cylinder , cone and so on . then , under considering the intersection of two cylinders or a cone and a plane , the mathematical models have been developed , and the corresponding unfolding methods have been determined . on the platform of autocad , the system has been redeveloped by means of autolisp and activex object , and the unfolding cad system has been designed , which can realize the parametric drawing of the extension of sheet metal
结合工程实际对曲面构件进行了分类，并通过分析建立了包括圆柱、圆锥、圆柱与圆柱相贯、圆锥与平面相贯等曲面构件的数学模型，确定了适当的展开方法，以autocad2000为平台，以autolisp结合activex对象为工具，进行二次开发，设计了曲面展开cad系统，从而实现钣金件展开图的参数化绘图。 |
