An algorithm for evaluating form errors of the optical freeform surfaces is presented in this paper.
研究了光学自由曲面面形误差的评定算法。
Digitizing of free form surfaces is one of key technologies on the reconstruction of free form surfaces.
自由曲面的数字化是自由曲面重建的关键技术之一。
The clouds form surfaces where chemical reactions can take place that produce ozone-destroying molecules.
在这种云表面化学反应会产生一种破坏臭氧层的分子。
A new algorithm for tracing equiangular curves is presented to improve the machining quality of free-form surfaces.
为了提高自由曲面加工质量，提出一种等斜率曲线跟踪算法。
The 3D reconstruction of free-form surfaces has been widely used in the fields of reverse engineering and virtual reality.
自由曲面三维重构技术在反求工程、虚拟现实等领域具有广泛的应用价值。
Experimental results show that the fault signal in free-form surfaces machining can be clearly monitored and distinguished.
实验结果表明，自由曲面加工的故障信号能很好被检测区别开来。
Lastly, feature recognition is implemented automatically according to the sequence of regular surfaces, swept surfaces and free-form surfaces.
最后按照规则曲面、扫掠曲面、自由曲面的顺序进行特征的自动识别。
A tracing algorithm for calculating the intersection curves of two free-form surfaces by using their osculating plane is presented in this paper.
提出了一种利用密切平面对两自由曲面进行追踪求交的算法。
The process of constructing free-form surfaces in Reverse Engineering and compares the untouched and touched measure methods was alysed in this paper.
分析了逆向工程中自由曲面的反求过程，对接触式和非接触式测量方法进行了比较。
Aiming at the global collision detection in 5-axis NC machining free-form surfaces, it proposes a new method to primarily detect collision real-timed.
针对五轴数控加工复杂曲面的全局干涉问题，提出了一种实时干涉初步检测算法。
A simple topology model is presented to represent complex topology structure of free form surfaces to compose arbitrary object for reverse engineering.
首先给出能够表示任意多个自由曲面拓扑结构的描述，该模型可用于表示反求工程中的任意物体。
In order to utilize the close data of the free-form surfaces obtained by the data co11ection system, a data processing system is presented in this paper.
本文针对已采集的曲面密集数据建立一套数据处理系统。
A new algorithm of automatic generation of interference free cutter location path for nc machining of free form surfaces with flat end cutters is proposed.
提出了一种新的曲面平头立铣刀加工无干涉刀位轨迹自动生成的算法。
Our house will be pretty simple - four walls and a roof, but we'll get to know how to create vertices and faces, and how to form surfaces from faces' groups.
我们的房子非常简单——四面墙、一个房顶，但是我们将学会如何建立多个顶点和多个面，并且从多个面的组里面构建表面。
It is important to know how to sample properly free form surfaces on CMM, which concerns the reconstruction accuracy of free form surfaces and measuring efficiency.
如何在三坐标测量机上合理地对自由曲面进行采样，将关系到曲面重建精度和测量效率等重要问题。
Spline surfaces are very important for the modelling of free form surfaces, because of their flexibility, simple concept and easy shape manipulation by the control points.
样条曲面具有灵活性，概念简单，易于通过操作控制点控制形状，所以对于自由曲面建模十分重要。
Surface polishing is typically used for the quick fabrication of free-form surfaces. The continuous demand for better quality has led to demand in higher surface accuracy.
工具定位精度和工艺合理性规划是影响自由曲面表面高质量制造的主要因素。
The paper introduces an algorithm for creating smooth spline surfaces over control triangular meshes capable of outlining arbitrary free-form surfaces with or without boundary.
介绍了一种在控制三角形网格上创建光滑样条曲面的算法，该控制网格能够刻画具有或没有边界的任意自由曲面。
The paper discusses the difference method of solving the 4th ordered elliptic partial differential equations and its application to the design of blending and free form surfaces.
本文讨论四阶椭园方程一类周期问题的差分方法及在过渡面、自由曲面设计中的应用。
The three-dimension reconstruction technique of free-form surfaces has been widely used in many fields such as manufacturing industry, art design, medical treatment and plastic surgery.
自由曲面的三维重构技术在制造工业、艺术设计及医疗整形等领域具有广泛的应用价值。
To aim at the research on cutting direction in NC machining of free-form surfaces, a simplified time model for tool trace is established, and the system of tool path programming is discussed.
针对自由曲面走刀方向数控加工的研究，建立了简化的刀具轨迹时间模型，并对路径规划的系统进行了讨论。
Linked together on the surfaces of silicon chips, they form the logic gates that do the calculations in computers, mobile phones, television sets and other electronic gadgets.
在硅晶片的表面将它们连接起来，就形成了逻辑门电路，这就是计算机，手机，电视机以及其它电子产品中最基础的元件。
Tiny cracks begin to form through contact with other surfaces, or even with water vapor and carbon dioxide.
当与其它界面相接触时，玻璃的表面就会产生微裂纹，即使是水蒸汽或者二氧化碳也会带来微裂纹。
So it's not entirely impossible that free-floating planets have hot cores, cold surfaces, and an intermediate layer, where water could exist in some fluid form.
所以，存在一种可能，不受约束的漫游星有炙热的内核，寒冷的表层，和一个特别的中间层，在那水是液态的。
Think about seasonal changes in the ground surfaces, management edges, and by incorporating both functional and aesthetic aspects, we will achieve design that provides both form and function.
认为在地面表面的季节性变化有关，管理优势，以及通过综合功能和美学方面，我们将实现设计，同时提供形式和功能。
These lamellas, along with the pre-weathered larch panelling behind the lamellas, form the building's characteristic appearance and give the outer surfaces structure.
这些薄片，以及落叶松镶板后面的预风化薄片，形成建筑的外观和外表面结构。
Each of the structures is made in a different folded form, intended to be "evocative of flight", and has information related to the local environment and wildlife cut into the steel surfaces.
每个构筑物都采用了不同的折叠形式，目的是“唤起飞行”，并用与当地环境和野生动物相关的信息切割钢材表面。
Each of the structures is made in a different folded form, intended to be "evocative of flight", and has information related to the local environment and wildlife cut into the steel surfaces.
每个构筑物都采用了不同的折叠形式，目的是“唤起飞行”，并用与当地环境和野生动物相关的信息切割钢材表面。
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