球面

In the displacement measurement based on the principle of laser interference, the Gaussian quadrics fitting algorithm is used to fix the central position of facula and raise the location accuracy.

在基于两球面波干涉的长度和距离测量实验中，运用高斯二次曲面拟合算法为激光光斑的中心坐标定位，提高了光斑的定位精度。

To the new and old customers better service, I Wafangdian Bearing Group Company and / Luoyang Bearing Group and the Luoyang Bearing Institute, famous and all major manufacturers have established good cooperative relations between suppliers, our company can meet new and old customers High-precision bearings on the demand for imports bearing sales NACHI, SKF, NSK, NTN, IJK, IKO, Japan, spherical bearing FYH, Germany SWC high temperature bearings, the British tobacco RHP high-precision machinery bearings, Germany FAG28000 / hours of high-speed, High-precision bearings, chemical equipment for the U.S. Fafnir Bearing, Japan EZO corrosion-resistant stainless steel bearings; NORGREN, SIEMENS imports of machinery and other accessories, the United States JOHN CYANE mechanical seals, Germany KUKKO bearing working tools, triangular belt, Q, H series Shotblast cleaning machine , And other products.

为了对新老客户更完善的服务，我公司与瓦房店轴承集团／洛阳轴承集团和洛阳轴承研究所，及各大名优厂家建立了良好的供货合作关系，我公司还可满足新老客户对高精密轴承的需求，进口轴承销售NACHI、SKF、NSK、NTN、IJK、IKO、日本外球面FYH轴承、德国耐高温SWC轴承、英国RHP高精度烟草机械轴承、德国FAG28000/分的高转速、高精度的轴承、美国Fafnir化工设备专用轴承，日本EZO耐腐蚀不锈钢轴承；NORGREN、 SIEMENS等进口机械配件，美国JOHN CYANE机械密封、德国KUKKO轴承装卸工具、三角皮带、Q，H系列抛丸清理机等产品。

An explicit mathematical representation of the exact boundary of a ball Bézier surface was given by recurring to the envelope theory of the family of bivariate surfaces in the classic differential geometry, as well as the spherical coordinates and the Cramer's rule.

根据经典微分几何中双参数曲面族的包络原理，运用球面参数坐标和Cramer法则，给出了球域Bézier曲面边界的精确数学显式表达式。

Feasible region of unit-sphere was defined by standard if angle between normals and stamping direction was less than 90°.

以冲压方向与网格法线夹角不大于90°为冲压方向可行的判据，确定在单位球面上的冲压方向可行域。

To improve the imaging quality of CCD camera and make the lens small in size,compact in structure,the wide field of view optical lens with the standard quadric surface and even aspheric surface was designed.

为提高CCD摄像机的成像质量，同时使镜头结构紧凑、小型化，在大视场光学镜头的设计中，引入标准二次曲面和偶次非球面。

Keywords: reflection-invariant measure; finite reflrction group; spherical harmonics; uncertainty principle; Hardy space

中文关键词：反射不变测度；有限反射群；球面调和；测不准原理；哈代空间

Then we transform the fisheye image of 180 degree to normal perspective image.

再用一种简单的数学模型即球面投影，实现了180度鱼眼图像的还原。

According to the relation spectrum resolution is inverse proportional to focal distance given a certain incident wavelength and phase number,and the theoretic formula is consistent with reported experimental result.

光谱分辨率是评价衍射微透镜分光特性的主要指标，根据标量衍射理论，给出了多台阶位相型菲涅尔透镜的设计公式，并利用球面波的传输理论推导了微透镜主焦距与光谱分辨率之间的函数关系，得出在入射波长和位相台阶数一定的情况下，光谱分辨率与中心焦距之间呈反比；理论推导的结果与已发表的实验结果一致。

The Large Sky Area Multi-Object Fiber Spectroscopic Telescope of ChineseAcademy of Science nation Astronomical Observatory Xinglong Observing station which costs 2.35 RMB is as high as 15 floors, and the optical system is made up of 3.6 meter caliber Schmidt corrector plate and 4.9 caliber spherical surface primary mirror and focal surface.

中国科学院国家天文台兴隆观测基地的"大天区面积光纤光谱天文望远镜"耗资2.35亿元人民币，最高处超过15层楼，由口径3.6米的反射施密特改正镜、口径4.9米的球面主镜和焦面组成光学系统。

Electrostatic forces are employed to manipulate the shape of liquid polymer lens. Surface profile distortions of the liquid lens result in its focus variability. UV light is employed to cure the liquid lens when its surface profile and focal spot are appropriate. Therefore, aspherical micro-lens with nice optical imaging and focusing abilities can be fabricated.

在实时进行光学检测的条件下，选择光固化材料，利用电场作用操控液滴透镜的面形实现变焦，在检测到较好的透镜面形和聚焦状态时，采用紫外光固化技术使液滴透镜固化，可制作具有良好光学成像和聚焦性能的非球面微透镜。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐