查询词典 hyperboloid of two sheet

An optical element such as a rear projection screen for an image display device comprises at least two substantially rigid sheet members each having a first major surface and a second major surface providing a plane of incidence and a plane of emergence, respectively, through which light is transmitted sequentially. A first sheet member comprises a Fresnel lens, and a second sheet member comprises a lenticular lens array on each of the major surfaces thereof.

一种光学元件，例如用于图象显示装置的背投式屏幕（1），包括至少两个基本为刚性各具第一主表面（21；31）和第二主表面（22，32）的板部件（2；3），分别提供顺序穿过光线（10）的入射面和出射面，第一板部件（2）和第二板部件（3）在其各个主表面（31，32）上分别包含一个菲涅耳透镜（24）和一个双凸透镜阵列33，35。

At present, the frequently used the backing sheet is divided into two main categories, namely, the backing sheet opaque and Semitransparent backing sheet.

长远，常用的不顶纸分为两不小类，即不透明不顶纸和半透明不顶纸。

Thereby, it generalizes portfolio frontier curve from hyperbola to hyperboloid of two sheets. When there exists risk securities, it generalizes frontier from straight line to cone. Meanwhile it gives some corresponding conclusions.

从而把原模型中没有无风险证券时的前沿证券曲线从双曲线推广到双叶双曲面，把有无风险证券时的前沿证券曲线从直线推广到圆锥面，同时还得到了一系列相应结论。

Although the hyperboloid is different from η-ξ spacetime in their global struc-tures, it has two of its cross sections equivalent to the Euclidean and the Lorentziansections respectively.

这个超旋转双曲面与η-ξ时空的整体结构不同，但它的两个截面却分别等价于η-ξ时空的欧氏截面和洛伦兹截面。

In a lot of fields, such as robot navigation, video surveillance, and site modeling, etc, there are needs to obtain the omnidirectional depth information of scene in real-time. In this paper, a method to realize panoramic stereo imaging utilizing two coaxial hyperboloid catadioptric cameras is presented, and its depth computational formulae are derived.

为满足机器人导航、视频监视和场景建模等领域实时获取全景深度信息的需要，提出了一种利用2个双曲面折反射相机同轴放置实现全景立体成像的方法，并推导了这种全景立体视觉系统的深度计算公式。

Ship to receive satellite signals for ships and satellites to changes in the relative position of the frequency of changes, called the Doppler frequency shift can be used to determine the satellite position, while the ship's position is located in a satellite location for the focus of hyperboloid , taking into account pairs of curved intersection line with the Earth's surface, then the boat is located on the intersection of two curves.

航船上接收卫星讯号因船与卫星相对位置的变化而发生频率变化，叫做多普勒频移，可用于确定卫星位置，而船位位于以卫星位置为焦点的双曲面上，考虑到双曲面与地球表面的交线，则船位于两条曲线的交点上。

Release coating which is the backing sheet surface coated with silicone oil layer, coated with silicone oil makes the backing sheet as a surface tension is very low and very smooth surface that are used to prevent adhesively bonded to the backing sheet.

离型涂布即在底纸表面涂布硅油层，涂布硅油可使底纸成为表面张力很低，很光滑的表面，作用是防止粘合剂粘结在底纸上。

This company mainly produces: Conductive materials, anti-static masterbatch, PP, PE, PS, PC, ABS; main target customers are, and anti-static conductive PP injection molding, hollow boards, turnover boxes, sheet: PE film blowing, blow molding , blowpipe, EPE; PS sheet, injection molding: ABS sheet, injection molding; PC extrusion, injection molding.

本公司主要生产：导电原料、防静电母料、 PP 、 PE 、 PS 、 PC 、 ABS ；主要针对的客户是导电及防静电 PP 注塑、中空板、周转箱、片材： PE 吹膜、吹塑、吹管、珍珠棉； PS 片材、注塑： ABS 片材、注塑； PC 押出、注塑。

In February 2000, the following flow charts and recording sheets were improved and put into use in 2001 by the former General Administration of Inspection and Quarantine: the whole CIQ residue monitoring work flow chart, CIQ residue monitoring sampling flow chart, CIQ residue monitoringsampling sheet, CIQ residue monitoring sampling tag, CIQ residue monitoring delivery sheet, CIQ residue monitoring testing results report sheet and the result statistics table.

2000年2月原国家出入境检验检疫局制定并修订完善了《中国动物及动物源食品残留物质监控计划》的工作流程图、CIQ残留监控取样流程图、CIQ残留监控取样单、CIQ残留监控样品标签、CIQ残留监控送样单、CIQ残留监控检测结果报告单、CIQ残留监控结果统计报表，并在实施2001年度残留监控计划中启用。

AS the plasticity of the said plastic sheet is too low so that in the process of construction, the sheet can't be constructed strictly according to design requirements, while the single plastic sheet has no problem; higher requirements on joist.

Construction Process 铝塑板与铝单板的施工过程大体相同由于铝塑板的可塑性太低，所以安装过程中不可能按设计要求严格施工，而铝单板不存在这一问题；对龙骨要求较高。

This paper designs the communication system of radio telescope FAST.

针对500m口径球面射电望远镜FAST分布式控制系统的特点完成了其通信系统的设计。

Political sheep's step-by-step a large number of fossils unearthed in the county soil Ma Ali after rural village in the middle of sallow pelitic siltstone.

步氏和政羊化石大量出土于广河县阿力麻土乡后山村，产于灰黄色泥质粉砂岩中。