查询词典 ruled surface

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。

Bout this Aumann[8] has provided some methods,connecting lines between two boundary curves,shaping ruled surface, and adding some developable conditions to ruled surface.

umann提出的方法是在两边界曲线之间连直线，形成直纹面，然后给直纹面加上可展条件。

In the case of kod≥0,we prove that s≥6,and construct a series of examples of s=6,where S is rational surface,elliptic ruled surface,Abel surface,K3 surface,Enriques surface,biellipticsurface respectively.

当〓时，证明了〓。并且找出了s=6的一系列例子，曲面类型分别为有理曲面，椭圆直纹面，Abel曲面，K3曲面，Enriques曲面，双椭圆曲面。

And two models of single channel are also developed, one is formed by ruled-surface impeller, and the other is formed by enveloping surface impeller.

然后在专门的网格划分软件Gambit中对两个整体风机三维流场模型和两个单叶轮通道的流场模型进行网格划分及边界条件设置。

Based on the CAD software UG, the models of centrifugal fans with ruled-surface impeller versus with enveloping surface impeller are developed.

首先本文采用CAD软件UG对直纹面叶轮离心通风机和包络面叶轮离心通风机进行了整体风机三维流场建模和单个叶轮通道的流场建模。

Rational planar curve; rational space curve; rational ruled surface; moving curve/surface;μ-bases; singularity; self-intersection curve; moving curve/moving surface ideal; ideal-theoretic/set-theoretic generators

基础科学，数学，几何、拓扑平面有理曲线；空间有理曲线；有理直纹面；动曲线/曲面；μ基；奇点；自交线；动曲线/动曲面理想；集论/理想论生成元

After some experimental results obtained in machining samples with complex ruled surface, concave spherical surface, convex surface and samples with both concave and convex surface are analyzed, the value of these samples in practical prodúction is discussed.

通过对一些典型的复杂直纹曲面样件以及凹球面、凸球面和凸凹复合球面样件加工实验分析，探讨了这些样件在实际生产中的应用价值。

Its principle is based on that there are some rdationships between curvatures of the theoretical profile surface and the real profile surface Curvatures of theoretical profile surface,which is a ruled surface,are easy to get.

该方法利用等距曲面间的曲率关系进行凸轮廓面曲率的解析计算。由于理论廓面是直纹面，其廓面曲率容易求得。

The surface of conventional engineering part is composed of simple analytical surfaces and four-boundary ruled surface primarily. Therefore a point cloud segmentation method based on those feature surfaces is proposed. Several algorithms to identify the simple analytical surface feature are investigated and discussed. The theory of fitting scattered point to B－Spline and Bézier surfaces is introduced and a fitting method based on four boundary and point set is also discussed. Moreover, anew method to recover the fix-radius rolling ball blend is proposed and discussed in detail.

常规工程零件的外表面中包含了大量的特征曲面，如简单解析曲面和四边直纹面，因此，本文提出基于特征曲面的的点云分割方法，研究几种识别简单解析曲面的算法；研究由点云拟合B－Spline和Bézier曲线的理论基础，总结曲面拟合的几种方法，提出一种反求定半径滚球圆角的方法。

The systems of machining complex curved surface by means of WEDM are classified to establish the main kinematics theories of machining complex curved surface by means of WEDM By analyzing various systems of machining complex curved surface by means of WEDM, the combination, characteristics, motion parameters and motion types of them are summarized And a model system of the is established according to the basic principles of the forming of ruled surface in spatial analytic geometry.

主要内容及取得的成果体现在以下几个方面：为了建立复杂曲面电火花线切割运动学的主要理论，本文对复杂曲面电火花线切割加工系统进行了分类，并分析总结出各种复杂曲面电火花线切割加工系统的组成、特点、运动参数及运动形式。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。