The general event horizon formula of black hole is given from null hypersurface equation.

从方程出发,导出了黑洞视界的普遍公式.

And the cost of computing is much less than senary triangular B-B patches.

这种方法在保证精度的情况下计算较之六次B-B片有较大的减少。

A new algorithm for tracing equiangular curves is presented to improve the machining quality of free-form surfaces.

为了提高自由加工质,提出一种等斜率线跟踪算法。

There are two key techniques in reverse engineering, the numeralization and surface reconstruction of 3D objects.

三维物体的数字化技术及重构技术是逆向工程的两个核心问题。

An error compensation control method which can improve contour tracing accuracy of aspherical surface ultraprecise machine is introduced.

介绍了一种可提高非球超精密加工机床的轮廓跟踪精度的误差补控制方法。

The abduction mapping method was introduced to deduce the transformation relation between the non-unbendable surface and the flat surface.

利用微分几何中的诱导映射理论求得非可展到平域内的变换关系。

The twin curved glass incised with an abstract pattern stabilizes three spaces: one internal, one external and one interspatial.

上雕刻有抽象图案的双玻璃使三个空间（内部空间，外部空间和层际空间）稳固下来。

The invention relates to a cambering printing machine, in particular to a high-speed cambering printing machine which can automatically proof the version.

本发明涉及印刷机，具体为一种可自动对版的高速印刷机。

Dual light path Laser Doppler Vibrameter System that can meet the out-of-plane vibration measurement for the slope plane and any curved surfaces is first proposed.

首次提出双路激光多普勒系统，它能适应倾斜平、任意的离振动。

Based on human factor engineering, semi-generative therblig-based Computer Aided Process Planning (CAPP) technology was present to improve productivity and standard process operation for Shipyard.

要针对目前国内造船企业生产效率低下、工艺和规程不规范的现状，从人因工程的思想出发，提出了基于动素的半创成式船舶分段生产计算机辅助工艺设计技术。

Processing material: PVC, PP, PET, PC, PO, PS, ABS, EVA, metalline, plastic, vitreous, woodwork, wax candle,plaything, stationery, giving Any material quality surface printing processing

大积丝印,彩印,移印,滚印,热转印,水转印,烫金,蚀刻平,印刷加工.

This article not only discusses the ruled surface features of uniparted hyperboloid and its application in archtecture engineering but also discusses the teaching of the ruled surface.

本文主要讨论了单叶双的直纹性,指出它在建筑工程中的应用,并对直纹的教学作了探讨。

The formula of the curve tangent slope at some peculiar point in the orthograph on the stereoscopic surface intersecting line and the method of making tangent are given as well.

本文通过可展的微分不变,导出可展的率线与率特征,并以锥和切线为例阐明这些特性的几何意义。

The goal of the mesh optimization algorithm is to re duce the number of the triangles in the mesh,and keep the accuracy of the interp olation at the same time.

反求工程中反求得到的数据模型虽然可以正确反映件的拓扑结构，但网格上的三角形的数一般比较大。

In this paper , a rigidity theorem of hypersurface in real space form will begiven.In addition, we obtain rigidity theorems of submanifold in sphere which improvethe result of Hou and Xu.

本文给出实空间形式中超的一个刚性定理，同时也得到求中子流形的刚性结果.