球面

The all-purpose 2.8- to 12-millimeter IR varifocal lens provides the proper field of view for most surveillance applications. The 2.9- to 8.2-millimeter IR varifocal lens features aspherical optics to provide a fast F1.0 maximum aperture for best low-light performance.

多功能的2.8至12mm红外变焦镜头为大多数监视应用提供了适当的视场角。2.9至8.2mm红外变焦镜头以非球面光学为特色，为最佳低光性能提供了高速的F1.0最大光圈。

Visitors use the trackballs to interact with the sphere's multimedia content, enabling them to explore the Intel story in their own way and at their own pace.

通过操作跟踪球，参观者可以与球面上的多媒体内容进行交互，可以用自己的方式和步伐来了解英特尔的历史。

First, sequential tomograms of the hip are obtained from a CT scan; secondly, an accurate and automatic method is used to extract the profile of the acetabulum; thirdly, a hybrid method is utilized to gather fiducial marks on the acetabulum; fourthly, bulky error sampling points are removed. Finally, an ellipsoid fitting method is used to fit the ellipsoid model of the femoral head. Two male sufferers with different necrosis extents are chosen as experimental subjects for contrastive simulation.

首先利用一种精确的自动分割方法在髋骨部位CT序列图像中提取髋臼轮廓；然后使用基于等距栅格采样法与辐条式采样法相结合的混合采样法得到髋臼凹面的空间坐标点集，并剔除其中的误差采样点；最后采用基于二次曲面一般方程的方法拟合原始股骨头椭球面模型。

Using cam for 492Q engine and coupled spherical tappets (R750mm, R2000mm) an investigation in the influence o tappet rotation on anti-scuffing property of camtappet is carried out on TM-1 cam-tappet wearing tester at speed of camshaft 1500r/min and 1050r/min.

本文对498Q发动机凸轮和与之配对的球面挺柱(R750mm、R2000mm)分别在凸轮轴转速为1500r/min和1050r/min两种工况下，在TM—1型凸轮挺柱磨损试验机上，进行了挺柱转动对凸轮挺柱摩擦副抗擦伤性能影响的试验。

In the same time, after shortly review the Halclanes description of the quantum Hall effect on 2-sphere S2, we obtain the corresponding noncommutative algebra An and the Moyal structure of the Hilbert space.

同时在回顾了Haldane在二维球面S~2上对量子Hall效应的描述，我们构造了S~2的非对易代数及其Hilbert空间的Moyal结构。

No distinct change of pulse waveform in the domain of -6dB width of focus speckles has been observed.

此外，对凹球面辐射和凹球带辐射的不同情况，比较了焦斑的宽度和压力包络的变化。

It consists of 11 elements in 9 groups and uses an Aspherical lens element to correct aberration for excellent image quality throughout the zoom range and a circular aperture for exquisite rendering of out-of-focus backgrounds.

它由11片9组，并使用了非球面镜片，以纠正像差优秀的图像质量在整个变焦范围和圆孔的精致呈现失焦的背景。

With our excellent processing technique,our company can process series of products such as spherical lenses,prisms,mirrors,reticles,circles,optical parts etc.

凭借精密的加工技术，本公司能生产球面透镜、棱镜、反射镜、度盘、分划板、镜头等系列产品。

More recently, singular optics has been extended to polychromatic cases by Professor Wolf and his co-workers, in which they have showed that drastic spectral changes occur in the vicinity of intensity zeros in the focal region of polychromatic, spatially coherent, converging spherical waves, i.e. the spectrum is redshifted at some points, blueshifted at some other points, and is split into two peaks elsewhere.

最近，Wolf教授和他的同事们指出：在多色空间相干会聚球面波焦点区域振幅等于零的点附近会发生剧烈的光谱变化，即在一些点处光谱为红移，在另一些点处光谱为蓝移，在其它点处光谱则分裂为双峰结构。

Circular steel arch es are distributed along the short span of the shell as the main load-bearing component,while steel tubes of rectangular section are distributed as purlins between the arches along the long span.

为满足建筑设计简洁通透的要求，该工程采用了沿椭球面短轴方向布置圆形钢拱结构为主要承载构件、拱间沿长轴方向布置矩形钢管作为檩条的结构方案。

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。