我们经常遇到的情形是,不知道如何参数化曲面。
What happens very often is we don't actually know how to parametize our surface.
提出一种基于物理模型的参数化曲面展开方法。
Parametric trimmed surface development is primarily used for flattening a 3D surface into a corresponding 2D pattern or surface.
提出一种基于逆向工程技术建立髋臼软骨参数化曲面模型的新方法。
In this paper, we present a novel parametric surfaces intersection algorithm based on discrete surfels.
应用于EX系统的NURBS曲面模型是本文的主要研究对象，EX系统从外部CAD／CAM系统获取曲面模型参数信息，通过IGES文件传递，将参数化曲面模型转化为系统可操作的几何模型。
The surface mesh is used in a GCAD system DressingSim EX. Our research aims at NURBS surface models. The models are transferred from exterior CAD/CAM system to EX system by IGES files.
本文主要研究了空间结构中自由曲面的参数化描述及网格划分算法，并编制了相应的程序。
This paper mainly researched on parametric description and meshing algorithm for the free surface of spatial structure with the program development.
曲面参数化是计算机图形学和计算机辅助几何设计中一个非常重要的问题。
Surface parametrization is one of important problems in computer graphics and computer aided geometric design.
接下来，我们的任务就是将平面与拼接曲面的有效部分相交所得截线参数化。
Then our task is to parameterize the intersection of and the valid part of for some fixed .
系统主要由读取数据文件模块、NURBS曲线生成模块、曲面构造模块、参数化修改模块、数据转换模块以及用户界面组成。
The system is mainly composed of file module of reading data, creation module of NURBS curve, surface construction module, parameterization modifying module, data conversion module and user interface.
针对一类四次隐式代数曲面，提出一种基于分片的几何参数化方法。
This paper proposes a piecewise geometric approach to parametrize a kind of quartic implicit algebraic surface.
微分几何中的曲面论，用两个变量就可以完全参数化一个二维曲面。
According to surface theory in differential geometry, the two-dimensional surface is parameterized by two variables.
针对自由曲面重构建模中存在的问题，对曲面数字化及离散点参数优化技术进行了研究。
Based on the existing problems in free-form surface reconstruction, surface digitizing and parametric optimization of random points are probed.
正则性是参数曲线曲面的重要代数性质，是由参数曲线曲面的参数化决定的。
Regularity is an important algebraic property of parametric curve and surface, which depends on the parameterization of parametric curve and surface.
针对汽车覆盖件这种复杂的三维曲面这一特例，编写了参数化网格划分的程序。
According to the Complicated Spacial Surface such as the auto body panel, a routine about parametric grid generation is compiled.
使得算法不受具体的曲面参数化方式影响，简化了刀具定位时计算量，刀位得到了充分的优化。
During the improvement, the parameterization of the surface has no influence on the algorithm, the computation cost for tool positioning is also reduced, and the tool path is optimized thoroughly.
跟踪求交是参数曲面求交常用的算法，而对于离散化的曲面也可以采用类似的方法。
A marching method for intersection is a common using algorithm for solving intersection of parametric surfaces, as well as that of discrete surfaces.
提出了一种新的曲面三角网格模型参数化算法——加权最小二乘离散参数化方法(WLSDP)。
A new algorithm called the weighted least square discrete parameterization (WLSDP) is presented for the parameterization of triangular meshes over a convex planar region.
提出了一种基于参数曲面三角化的复杂曲面刀具轨迹生成方法。
Based on the triangulation of parametric surface, a new method of tool path generation for complicated multi surfaces is presented.
文中根据曲线曲面型值点，分别用四种参数化方法构造节点矢量，利用NURBS方法反算控制点。
In this paper, the control points are calculated based on the curve or surface's data points and the knot vector which is calculated with four kinds of parameterization by the method of NURBS.
在虚拟环境中，对人体头部变形曲面提取特征并参数化，建立基于弹簧质点系统的标准几何模型；
In a visual environment, the characters of transformative head surface were parametrically drown out and a standard geometrical model of head was established based on the spring mass system.
这样将两基曲面间构造过渡曲面的问题转化为在重新参数化局部基曲面间构造过渡曲面。
Therefore, generating a Parametric G n Blending Surface between two base surfaces is translated into generating a Parametric G n Blending Surface between the two reparameterized local base surfaces.
隐式曲面与参数曲面相比在创建、修改、可视化方面需要不同的技术，并且具有不同的性质及应用领域。
Implicit surfaces are different from parametric surfaces in creation, modification and visualization, and have different properties and applications.
通过泛函的极小化计算得到相关参数，并进行加权分析得到相关曲面。
Meanwhile we wight the functional and analysis it to get a correlative surface.
分析了使用网格法参数化绘制已知曲面方程三维曲面图形的方法。
The method of drawing 3d camber figure of the given camber equation with the parameterization of the grid way is introduced.
分析了使用网格法参数化绘制已知曲面方程三维曲面图形的方法。
The method of drawing 3d camber figure of the given camber equation with the parameterization of the grid way is introduced.
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