An equivalent flow length method was used to predict the filling pattern and transferred the tracing of melt front to computing weighted approximate shortest flow path on finite element mesh model 该法将熔体前峰面的追踪问题转换为带权曲面上任意两点间近似最短路径的求解。
This dissertation studies the surface reconstruction technology in virtual cad and the relevant bases such as virtual reality mesh modelling and mesh optimization 随着计算机在工程设计领域应用的进一步发展，以虚拟交互技术和计算机辅助设计技术为基础的虚拟cad日益受到重视。
3d mesh models are being used widely as a new type of media , and the problems of copyright protection and content authentication have become the hotspots of 3d mesh processing 三维网格模型作为一种新型多媒体产品得到日益普及和广泛应用,它的版权保护与内容认证成为人们日益关注的热点。
The main research work is as follows : an algorithm of transforming an image to a relief is presented . a relief with topologic rectangular mesh model is created by its gray value 论文的主要工作如下:设计了一种由位图图像生成浮雕的方法,根据图像的灰度信息生成基于矩形拓扑网格表示的浮雕模型。
There are three types of real - time character animation : articulation animation , single mesh model animation and skinned mesh animation . this thesis describes all three with considerable depth 实时角色动画分为三种:关节动画、单一网格模型动画和骨骼蒙皮动画,本文对这三种动画技术做了深入研究。
In this algorithm , the sharp features on a mesh model are located through analysis of quadric error matrixes of super - neighbor of vertices on the model , so that these features can be preserved during mesh simplification 通过分析网格模型中顶点超邻域的二次误差矩阵，对模型上的重要细节特徵进行定位，实现了网格简化过程中细节特徵的保持。
This paper discuss the key technologies of virtual manufacture , including the method and theory of the displaying of the 3d scene , polygonal mesh model , visual light model , collision checking , 3d geometry transform and the particle system 对虚拟制造的关键技术进行了讨论，包括三维场景的显示、多边形网格模型、真实感光照模型、碰撞监测、三维几何变换和粒子系统等。
Based on the relocating mesh model , according to heat conduction theory , elastic creep theory and finite element theory , simulation program for roller compacted concrete overflow dam is worked out through 3 - d finite element method 基于本文提出的计算模型，根据热传导理论、弹性徐变理论及有限元理论，作者编制了碾压混凝土溢流坝温度场及温度应力场的三维有限元仿真计算程序。
On the base of trust path and certificate validation steps , we analyze the time complexity of two trust models ( subordinated hierarchy and cross - certified mesh model ) , and then analyze the methods of certificate validation in current standards 第三，介绍了信任路径的概念，证书验证的一般步骤，在此基础上分析了两种具有代表性的信任模型（附属层次模型和交叉认证网模型）证书验证的复杂度。
Based on the hoppe ' s progressive mesh generation algorithm , restrict the simplified mesh model ’ s vertices to the initial mesh model ' s vertex set , when refinement sequence is generated . this can reduce the information included in the refinement sequence 在hoppe渐进网格生成算法的基础上,在生成细化序列时,将简化网格模型的顶点局限于初始网格模型的顶点集合中,减少了细化序列所包含的信息。
