1. 昆氏曲面:Draft 草绘曲面 | Coons 昆氏曲面 | Loft 举升曲面
1. In this paper, an important theorem which is used in the conversion of Coons surface to NURBS surface is discussed.
给出了这个定理的一种构造性证明。定理的证明过程同时也给出了转换方法。
2. However, computing the bicubic Coons is much faster because a lot smaller system of equations must be solved.
可是,双三次昆氏曲面的计算要快得多,因为它只需计算更少的系统方程。
3. Finally this paper gave a simple example of the application of COONS surface.
最后本文对COONS曲面片的应用做了简单的举例说明。
4. danci.edu.pub
4. They have to catch three coons to qualify for the finals.
他们赶上三个孔斯有资格参加决赛。
5. Based on the principle of COONS surface, a new method for processing the characteristic curve of the hydraulic turbine is proposed.
本文以C00NS曲面理论为基础,提出了处理水轮机特性曲线的一种新方法。
6. Now we see his persistence in chasing the coons, and how worried he becomes when his coons are in danger.
现在,我们看到他的坚持追逐孔斯,以及如何担心他成为他的孔斯有危险。
7. Coons的翻译
7. B: I''ve been hunting coons and judging coon hunts for forty years, but I''ve never seen anything like that.
四十年来,我一直在猎杀浣熊与判断浣熊的猎杀,但我从未看过有像这样的事。
8. Coons, who spoke at a briefing yesterday on the research, emphasize that it''s important for people to take care of themselves so they have more energy for the other things they need to do.
不过库恩斯在周三有关这项研究的简要介绍中强调,人们关心自己很重要,这样他们就有更多的精力来做其他需要去做的事。
9. Y-intersection; vertical design; bilinear Coons surface model; regulating ridgeline of pavement
针对以上问题,本文提出了基于重心法的Y形平面交叉口路脊线自动调整的方法和基于线性Coons曲面模型的立面设计新方
10. The constructed surface not only has the same structure to the bicubic Coons pacth, but also it can help us to obtain different surfaces by changing the values of the parameters. Furthermore, it can accurately represent torus、ellipsoid and so on.
所构造的曲面不仅具有双三次Coons曲面片的相似的结构,可以通过改变参数,得到不同的曲面片,而且还能精确地表示圆环面、球面、椭球面等二次曲面。
11. Coons什么意思
11. Among them, the mechanical structure, the configuration of hardware and software, the specification parameter and the environmental request of LK G90CS15.10.8 thiee-CMM mat are used in this thesis are introduced specially. By using LK G90CS15.10.8 three-CMM, the measuring data of the telephone hand-receiver are acquired. The types and the processing methods of measured data are discussed. Aiming at the error points in points data, a method using Coons surface is put forward. Filtration is commonly used in data smoothing, and median method is adopted in this article. Moreover, the chord method and the curvature method are used here to compress the data and extract the feature points of the telephone hand-receiver measured data. The developing process of surface molding is introduced and the formation algorithm of free-form surfaces is compared By using NURBS algorithm in mis article, the telephone hand-receiver surface is reconstructed. In addition, the surface of the telephone hand-receiver is cut according to the feature curve created by the feature points. The craft of numerical control machining program of complex surface is analyzed and compared. These craft are machining method, cutting dosage, machining remainder, cuter walking mode, the cuter advance, the retreat mode, programming zero, and machiningcoordinate so on. The conclusion that the layer cutting is fitter for rough machining is made. The formula of scallop-height method controlling machining step is deduced. Finally, the cutting and cutter parameter for rough machining and finish machining of complex surface is put forward in the MasterCAM software, according to which the cutter route for rough machining and finish machining are produced respectively.
本论文的主要工作在以下几个方面:分析与比较了目前常用的数字化测量方法及各种三维数字测量设备,着重介绍了本课题所用到的LK G90CS15.10.8型三坐标测量机的机械结构、软硬件配置、规格参数及环境要求,并用该机器对某电话机听筒外壳的三维表面进行扫描测量;阐述了反求工程的测量数据类型及各种数据点的处理方法,提出了利用Coons曲面原理剔除噪声点的方法,采用中值滤波方法对测量数据进行平滑,提出了用弦高差等方法和特征曲率法对电话听筒外壳数据进行了数据点的精简和特征点的提取的方法;论述了曲面造型技术的发展过程,比较了自由曲面和各种生成算法,应用NURBS算法重构了电话听筒的外壳曲面,并利用特征线对生成曲面进行了裁剪;分析比较了复杂曲面数控加工的切削方式、切削用量、走刀方式进退刀方式、编程零点和加工坐标系的确定,推导出用残留刀痕法来控制加工步长的关系式,阐述了在MasterCAM环境下如何选定待加工曲面的切削参数和刀具参数,并根据所选刀具和切削参数分别生成了电话听筒外壳型面的粗加工和精加工过程的刀具路径。
12. The curved surface of the pocket of the female mold is constructed by the method of Coons surface, which is suitable to describe the tyre profile.
提出采用Coons曲面构造出模具内腔壁曲面的方法。
13. A Method for Generating Fractal Surface of Coons Type
Coons型分形曲面的生成方法
14. Coons的意思
14. A garment surface is created by interpolating the quadrangular mesh of a garment sketch with Coons surfaces.
服装曲面则以三维草图为框架,通过对四边网格双线性Coons曲面插值生成。
15. Coons的翻译
15. The relationship between the bicubic B-spline surfaces, Coons surfaces and Bezier surfaces is also discussed.
本文还讨论了双三次B样条曲面与孔斯及贝齐尔曲面的关系。
16. The bicubic Coons interpolation function is also used to fit the space curved surface.
用高阶双三次Coons样条插值函数来拟合叶型的空间曲面。
17. For this purpose, the problems of approximation to seismic interfaces by bicubic Coons surfaces are discussed and applied to the three-dimensional geologic structure of carbonatite H. Q.
为此,我们具体地研究了双三次Coons曲面逼近地震分界面的问题,并将之应用于HQ地区碳酸盐岩三维地质结构。
18. Study on Interpolation of Bivariate Normal Distribution with Coons Surface Method
二元正态分布函数(Coons曲面法)插值研究
19. A method for achieving the aim of a desired deformation for a curved surface by means of changing the blending function of Coons surface under fixed boundary conditions was put forward.
提出了在固定边界条件下,通过改变Coons曲面的混合函数来使曲面变形,并达到预期变形目的的方法。
20. It has been pointed out that the influence of blending function upon the shape of Coons surface should be restricted by boundary conditions that contain the boundary curves, and lacking of necessary boundary conditions there is no method to obtain the required deformation merely relying on blending function.
指出混合函数对Coons曲面形状的影响,要受到包括边界曲线在内的边界条件的制约,缺乏必要的边界条件就无法仅凭混合函数来获得所需的变形。
1. Hendrickson said Maine Coons are known as " the gentle giants " of the cat world.