距离圆

Spatial relationship; Polygon; Delaunay triangular net; Closest distance; Restricted circle

空间关系；多边形；Delaunay三角网；最近距离；约束圆

Product Instructions: Enhanced VMS series of optical image measuring instrument was an enhanced 2D optical image measuring instrument which bring out by our company. Using high-resolution color Sony CCD camera and the United States NAVITAR Zoom Lens and With our company's Manual version of self-developed measurement software MCINS .This tester have the basic measurement functions of point, line, circle, distance, angle etc .and multi-axis functions which are ableing to meet the basic needs of the secondary element measurement. In addition, measurement data can be input EXCEL, WORD, TXT or output the measurement graphics to the DXF document to make CAD designs.

增强型VMS系列光学影像测量仪，是我公司推出的一款增强型2D光学影像测量仪，采用高分辨率日本索尼彩色CCD摄像机和美国NAVITAR变焦物镜，采用我公司自主研发的MCINS手动版测量软件，具备基本的点、线、圆、距离、角度等基本测量功能及多坐标功能，能满足基本的二次元测量需求；此外测量数据可输入EXCEL、WORD、TXT中或者将测量图形输出至DXF文档做CAD设计。

The imaginary great circle around the earth's surface,equidistant from the poles and perpendicular to the earth's axis of rotation.

赤道地球赤道想象中环绕地球表面的大圆，距南北两极距离相等，与地轴垂直，它将地球分为北半球和南半球

The star, located some 500 light-years away in the direction of the Ophiuchus constellation, is encircled by a disk of the material from which planets form.

这颗恒星距离我们500光年，蛇夫座方向，被一个将形成行星的物质的圆盘所环绕。

These gears are manufactured with widths of their teeth (as measured along the pitch circle) such that when two such gears are installed with a center distance consistent with their standard pitch diameters, the teeth of the two gears will mesh "well".

生产齿轮的时候要根据齿的宽度，这样当两个齿轮装配成中心距离与分度圆直径相吻合的时候，两个齿轮的齿就可以正确啮合。

By Visual Basic 6.0 program, taken the distance between hole 200mm and buried depth 120～150mm as the optimization goal, the most optimum parameters range of the mechanism was obtained as follows: the initial angle between planet frame and the line formed from spraying-fertilizer needle-tip and planet wheel axle was -45°～-40°, the initial angular displacement of planet frame was 40°～50°, the distance between spraying-fertilizer needle-tip and the planetary gear axle center was 280～300mm, simultaneously, the semi-major axis of elliptic gear was 29.364mm, the teeth quantity was 23, the ratio of semi-minor axes and semi-major axis was 0.958, the radius of circular gear was 25mm.

对该机构进行运动学分析，建立了数学模型，以穴距200mm和入土深度120～150mm为寻优目标，应用Visual Basic 6.0软件编程得出满足机构运动要求的最优参数范围为：喷肥针尖和行星轮轴连线与行星架的初始夹角-45°～-40°、行星架初始角位移40°～50°、喷肥针尖与行星轮轴心距离280～300mm，此时椭圆齿轮长半轴29.364mm、齿数23、短半轴与长半轴比0.958，正圆齿轮半径25mm。

I thought of their unfathomable distance, and the slow inevitable drift of their movements out of the unknown past into the unknown future. I thought of the great precessional cycle that the pole of the earth describes.

我想到它们远不可测的距离，它们缓慢的不可避免的运动，从木可知的过去走进不可知的未来，我想到地球运转时画出来的一个巨大的圆。

The radii of the rings are determined by the spacing of the gravity observation points.

圆的半径为重大观测点之间的距离所决定。

Statistics were made on the shape of 150 glaciogenic gravels at diameter from 5-15 cm and with one or more stria surfaces, of mainly medium-grained granite and a few sericite schist.

有些作者的工作表明，冰碛中的砾石随搬运距离的增加，其磨圆度和球度的提高是明显的1、2'；还有人用A。

The height of bulliform cell groups reached 0.18 of leaves thickness, which was another important quantitative characteristic to achieve function of bulliform cells.

泡状细胞的周长面积比仅占普通表皮细胞的0.723，是泡状细胞功能实现的重要数量特征；(2)以细胞面积、周长、等效圆直径、每平方公厘细胞数、周长面积比，可以建立小麦叶片泡状细胞Fisher's线形判别函数，判别正确率达99%；(3)泡状细胞组高占叶厚的比例达到了0.18，是泡状细胞功能实现的又一重要数量特征；(4)相关分析表明，泡状细胞组长、泡状细胞组高、泡状细胞组面积均与泡状细胞距离叶缘的位置呈极显著负相关。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。