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In this paper, a series of lunar map projection formulas are deduced including azimuthal projections, cylindrical projections and conical projections. The lunar map projections software is compiled. By caculating lunar map projection distortions, their projection distortion rules are found. Base on the lunar exploration mission, the lunar map projection scheme is given in this paper. The azimuthal conformal projection or the circumcenter perspective azimuthal projection is usually used in small areas, especially in two poles. When the whole map of the moon is needed, the azimuthal conformal projection or the circumcenter perspective azimuthal projection is used within 10° in the poles, and the traverse tangent cylindrical conformal projection or the normal secant conical conformal projection can be used in else areas, furthermore, band-division is necessary to reduce the projection distortion.

本文推导了基于月球参考球的各种投影公式，主要包括方位投影、圆柱投影和圆锥投影；编制了月球地图投影计算软件；对多种月球的投影变形进行了详细的计算，总结分析了各种月球投影的变形规律；结合月球探测的需要，给出了月球投影方案的建议：对于局部的面积较小的投影区域，建议使用等角方位投影或外心透视方位投影；如果绘制月面全图，在两极10°范围内采用等角方位投影或外心透视方位投影，其余区域可以采用等角横切圆柱投影和等角正割圆锥投影，并且要进行分带处理。

The first conductivity base board comprises: a base material, a first projection, a second projection and a light spacer; the first projection and the second projection are installed on the base material with central line symmetry, the second projection is the image structure of the first projection relative to the central line.

第一导电基板包括一底材、一第一凸块、一第二凸块及一光间隔物，第一凸块及第二凸块以对称于一中心线的方式设置于底材之上，第二凸块为第一凸块对应于此中心线的镜射结构。

The first section is descriptive geometry, including basic knowledge of cartography and projection, projections of point, beeline, plane and their interrelations, projection transformation, curve, curving plane, the projection of curving plane solids, line of section, line of intersection, section and segmentation, elevation projection, dimetric projection.

第一部分为画法几何：其中有制图基本知识，投影的基本知识，点、直线、平面的投影及它们之间的关系，投影变换，曲线、曲面及曲面立体的投影，截交线与相贯线，剖面图与断面图，标高投影，轴测投影等。

This paper studies and analyses the map projection transformation, using VC ++ programming language to realize three projection transformation: inclined position projection, Mercator projection and Gaussian M- Ke Lvge projection, and makes the application tests.

本文对地图投影变换做了尝试性的分析研究，利用VC++编程语言实现了斜轴等积方位投影、墨卡托投影和高斯-克吕格投影三种投影变换，并做了应用测试。

It respectively constructs quasi projection-separation facet sets of two convex polytopes while their orthogonal projection on the centerline overlap mutually. Afterward it judges the separation of two convex polytopes by confirming non-overlap in orthographic projection on the centerline or by finding out a projection-separation facet from two quasi projection-separation facet sets, otherwise a collision is judged.

该算法通过判断2个凸多面体在中心线上的正投影不相交，或者分别构造它们的准投影分离面集合，并从这2个集合中找到一个投影分离面，来判断2个凸多面体分离；否则，判断为相交。

In the information era, there are many multimedia equipments in market, people can not use most of them freely. As a cost-effective system, SVS comes to undertake this role by providing professional large-screen display system and intelligent control system in overall. SVS insist to designing and producing large screen system, covering the products that based on projection technology, such as projector, projection TV, plasma, LCD TV, projection screen, video booth, Whiteboard, writing screen, big-screen mosaic system, matrix interface, video conferencing, central control system and other related accessories.Relying on a high level ideal of "creation and practical", with high-quality technology, market development and service team, SVS is in a fast lane of development. Since was built in 2003, has SVS achieved widespread attention and recognition in field, and established a good relationship with IT media, supporting manufacturers and industry research institutions, always thinking customers' demand and provide specific programs by Symposium, three-dimensional-type promotion, performance monitoring and analysis.

信息化时代，多媒体设备层出不穷，让人措手不及，无法真正去灵活运用，搭配出最佳适合用户需求的高性价比系统，SVS勇于承担这个角色，专业成就大屏幕显示系统与智能化控制系统整体方案设计及制造，SVS自始至终以大屏幕为主线，涵盖了以投影技术为基础或依托所开发、搭配或衍生的产品，包括投影机、背投电视、等离子、液晶电视、投影屏幕、视频展台、电子白板、书写屏、大屏幕拼接系统、矩阵接口、视频会议、中央控制系统及其他相关配件或零组件，公司依托一支具备"作风严禁、勇于创新、讲求实效"的高层次、高素质的技术开发、市场开拓及服务人才队伍，SVS正在惊人地快速发展，自创建以来，已经在业内取得了广泛的关注与认同，与IT媒体、配套生产商以及行业研究机构建立了良好的合作关系，始终以客户的需求为中心，帮助客户提供专项设计方案，专题讨论，立体式推广，效果监测和用户分析等各种服务，最大限度地方便客户，为客户提供解决方案，不断满足客户多样化、个性化、复合化的需要，帮助客户以最少的成本获取最大的收益。

This paper established a new kind of relation on projection——conic projection analogue by introducing the latitude circle and longitude circle analogues, then discussed the best choice of the conic vertex angle in this projection, and found the mathematical model and the applicable scope of this projection.

摘 要：本文通过引入类纬圈和类经圈，建立了一种新的投影关系——类圆锥投影，进而探讨了类圆锥投影中圆锥顶角的最佳选择，找到了类圆锥投影的数学模型和适用范围。

According to their processes of construction, the projection methods are classified into three types in the present paper, namely, the Helmholtz-Hodge decomposition projection methods, the operator splitting projection methods and the local continuous projection methods.

本文根据投影方法的构造思路，将众多的投影方法分成了3类，即： Helmholtz-Hodge分解类投影方法、算子分裂类投影方法和局部连续投影方法，并详细的介绍了3类投影方法的发展历程和求解步骤。

The 2D affine projection model is analyzed from geometrical relation of parallel projection, the conversion of projection, the foundation of strict mathematical model of 2D affine. The characteristics of 2D affine projection are illustrated by experiments.

从平行投影的几何关系分析、投影性质的转换、严格仿射变换数学模型的建立等方面，深入研究了基于仿射变换的传感器模型，给出了实验结果和分析结论。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。