曲面

It will promote the development of 3D measurement in our country in academic and practical.

在国内自由曲面三维测量的研究方面具有一定的学术价值和实用价值。

Surface reconstruction is of great importance in a variety of situations.

曲面重建是逆向工程中的关键技术，在许多领域都有重要应用。

To solve the problem, the method that all the elements of the image of dual absolute quadric are transformed into the same magnitude is proposed.

提出了一种变换法，使对偶绝对二次曲面像的各个元素变到同一个数量级上，可以使求解过程更具有鲁棒性。

An analysis on camera critical motion is given and a conclusion is proposed which clarifies that the critical motion is decided by the ambiguities of the absolute quadric.

通过对相机的临界运动进行分析，指出了相机运动的关键性在于绝对二次曲面求解的模糊性这一结论。

The velocity,acceleration and time of a particle sliding down along a horizontally free concave surface are discussed.

对于一个质点从可自由移动的光滑的凹曲面上滑下的速度、加速度和时间作了一般性讨论，建立了相应的公式。

The fatigue reliability analysis for the 16V240ZJB diesel engine crankshaft inserving DF4B internal-combustion locomotive were carried out in thisdissertation.Firstly,according to the fatigue loads of the crankshaft,the bendstress and torsion stress at danger zone in rated operation modes werecalculated respectively.The stress randomicity of the crankshaft was analyzedrelating operation modes of acceptance,and the probability distribution ofstresses were obtained with statistical analysis.

运用本文所提出的疲劳可靠性分析模型(干涉模型-Miner准则综合法及弯扭复合模型)和经分析简化得到的材料p-S-N曲线和p-Sa-Sm-N曲面，分别按一维、二维疲劳应力及弯扭复合应力三种情况对东风4B型内燃机车16V240ZJB柴油机曲轴进行了疲劳可靠性分析。

In this paper a new strategy and algorithm of non-circular surface NC grinding based on ACIS studied.

介绍了处理基于ACIS实体造型的任意非圆曲面内圆磨削的新策略和新算法。

The algorithm has been implemented with VC++6.0 on the platform of ACIS.

4给出了曲面重建过程中重要的数据结构和算法流程，并在ACIS平台上采用VC++6.0加以实现。

The ACIS geometric modeling platform components provide wireframe and surface offset operating functions.

本ACIS几何造型平台组件提供线框和曲面的偏移操作的功能。

Finally the time and space complexities of various algorithms are briefly and concisely discussed, also the research trend of surface triangulations based-on 3D arbitrary point-sets.

从剖分对象来看，剖分可分为以下 3类：平面区域剖分、三维实体剖分和空间曲面剖分，曲面剖分问题有时也称为二维半

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。