球面

Design, manufacture and testing of aspheric optics［M］.

潘君骅。光学非球面的设计、加工与检验［M］。

Design principle and application of aspheric lens［J］.

刘亚威。非球面镜片的设计原理和应用［J］。

Screw heads have to be polished, with their slots and rims chamfered.

所有螺丝帽的边缘及凹口都要削角抛光，螺丝尾则须做平面或球面抛光。

The digital simulation of thedynamic processes under step load input and supply oil pressure fluctuation were carried on by MATLAB. Analysis of the dynamic characteristics was done with the changes of the supply pressure, load, structural parameters of spherical hydrostatic bearing and the effective bulk modulus of oil. The conclusions show that structural parameters of the spherical bearing and the effect bulk modulus of oil have significant influence to dynamic characteristics, but the elasticity deformation of interior supporting collet has very small influences on the output response characteristics of the suspension system. The collets deformation can be neglected on the project.

在此基础上，建立了考虑内支撑筒的弹性变形与否时悬浮系统的数学模型，同时，建立了线性化的仿真模型，利用MATLAB对阶跃负载输入和油源压力脉动输入下的系统进行动态过程的数值仿真，结果表明球面副的结构参数，油液的有效体积弹性模数对系统的响应特性有明显的影响，而内支撑筒的弹性变形对悬浮系统的响应特性的影响很小，在工程上可以忽略其弹性变形。

The designing and making of an aspherical lens have become easier owing to the develop-ment of computator technology.

随着计算机技术和高精数控工艺的出现和发展，非球面透镜的设计与加工变得比较容易。

There are many situations where observed data are in the form of direction cosines or vectors but with an unknown positive scalar so that only the direction is known.

实际中常有这样的情形，当我们观察到的数据是以方向的形式或者以向量的形式给出但却具有未知的度量单位，因而只知道它们的方向，这时我们观察到的就是球面数据。

This paper presents a new analytic approach to synthesize the spherical four-bar mechanisms with two prescribed coupler curve cusps, and to analyze the motion type of the generated mechanisms.

本文提出一新的解析法来合成具两特定尖点耦杆点曲线之球面四杆机构，并详加讨论所合成出之机构的运动型态。

Historically, datums have been based on ellipsoids that best represent the geoid within the region the datum is intended to map.

历史上，大地基准面一般基于与制图区域大地水准面最接近的地球椭球面构建。

The formulae of the anterior surface are ellipsoids, with the major axis on the Z axis and the short axis on the Y axis.

正视儿童角膜前表面为长轴在Z轴、短轴在Y轴的长椭球面。

Products: graphite ring, graphite seal ring, graphite seals, graphite bearings, graphite crucible, graphite spherical ring, cylindrical graphite, graphite blades, flexible graphite, graphite ring rotary joint, sliding, bearing, friction block, piston rings, orientation ring, such as carbon plate.

产品：石墨密封圈，石墨密封环，石墨密封件，石墨轴承，石墨坩埚，石墨球面环，石墨圆柱，石墨叶片，柔性石墨，旋转接头石墨环，滑片，轴瓦，磨擦块，活塞环，导向环，碳板等。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。