曲面

Freeform headlamp is one of the headlamps with great potentialities.

自由曲面前照灯是最具发展潜力的前照灯之一。

Designing a freeform headlamp was focused on by using computer simulation design.

研究用计算机仿真设计来进行自由曲面前照灯的设计。

It mainly included: light source modeling,freeform reflector design and headlamp illuminating effect simulation.

其主要内容包括光源建模、自由曲面反射器的设计和前照灯照明效果模拟三大部分。

As the application of the methods given, involute helicoid, which is widely applied in engineering, is developed into plane. And the problem in plate metalwork, which is t he development of square-circle tie-in, is also solved by the method.

其一是钣金工中方-圆类接头的展开问题，该问题的解决是锥面展开方法的成功应用；其二是螺旋输送器的核心部件——铰龙的展开问题，它是切线曲面展开方法应用的典型实例。

Being formed by linear grain curved surface, helicoid can be expressed by a group of simple lines. Writing two equations of inside and outside of the helicoid, getting any one of simple line′s equation and from which getting the coordinations of two end points by projection transformation, the CAD system of helicoid is achieved. It...

由于螺旋面为直纹曲面，因此可用它的一组素线表示，用极坐标的形式写出内外两条螺旋线的方程，求出任一素线的方程，并通过投影变换求得素线上两端点的坐标矩阵，进而设计出螺旋面的CAD系统，并将其应用于实践，为设计优化决策提供有力的证据。

A helicoidal surface in Minkowski 3-space is defined as the orbit of a plane curve under a screw motion.

三维Minkowski空间中的螺旋面是一条平面曲线经由螺旋运动所生成的曲面。

Especilly, we prove that any pseudo-umbilical helicoidal surface in Minkowski 3-space is a ￡?-scroll.

其中后两类类时伪全脐曲面的形状算子不能对角化，它们在三维Euclidean空间中没有

Solar thermal technology is one of the lowest cost one among the solar technology, this paper introduces the system design of solar thermal power tower, heliostat technology, master control technology, receiver technology and other key technologies basing on China's First Solar Thermal Power System, especially the curved reflector shaping method, the design of non system error mechanism, program calculation associating with sunlight sensor control technology of the heliostat, and the forced air cooling tech...

太阳能热发电技术是成本最低的太阳能利用技术之一，本文以我国第一座塔式太阳能热发电系统(70kWe)的研发建设为基础，介绍了塔式太阳能热发电的系统技术、定日镜技术、集成控制技术、接收器技术等关键技术的研究，特别是定日镜的曲面镜成型技术、无系统误差的机构设计、程序计算和太阳光传感器联合控制技术，以及接收器的玻璃窗口风冷技术、结构设计技术、蓄热技术等。

A more prominent answer was given by Chen et al.in 2001 with the announcement of a new type of heliostat,called the non-imaging focusing heliostat.

然而该科学家并没有给出具体的曲面公式。陈等于2001年发表了无光象聚光定日镜理论。

The Hessian tensor can also be used to find corners, which are useful for feature selection and edge linking.

此外，我们亦提出了一个Multi-scale的架构来侦测切割影像曲面中的平坦区域。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。