三维

In Asia Pacific, it is 2D layout then "PDMS modeller" transfer to 3D and some company it is for show.

在亚太地区，一些公司是这样的，做好二维平面布置，然后通过PDMS建模的人装入三维中。

The work out develops 2 dimension multigroup method of vertical mark of section piece disperse (section piece spreads out NSNM of NDOM) module program and three-dimensional multigroup method module program, develop the module program HANWIND; that SN means sets inside section piece for fundamental work out with this among them, NSNM begs the functional module that solves two dimension problem for HANWIND.

编制开发二维多群节块离散纵标方法模块程序NSNM和三维多群节块展开方法模块程序MGNEM，并以此为基础编制开发节块内嵌SN方法的模块程序HANWIND；其中，NSNM为HANWIND求解两维新问题的功能模块。

Professor Simon Newcomb was expounding this to the New York Mathematical Society only a month or so ago.

你们都知道，我们可以在只有两维的平面上表现一个三维的立体图。

Two optimal criteria of the vertex normal vector estimation are presented.

给出了一个判别二维多边形和三维多面体顶点法矢计算方法优劣的准则。

It was proved that the area coordinates of plane triangle element and the volume coordinates of tetrahedron element are equivalent to the oblique Cartesian coordinates by the analytical and geometrical methods.

本文通过分析法和几何法证明：在有限元法和边界元法中，平面三角形单元的面积坐标或四面体单元的体积坐标与由这些单元的二边或三边构成的斜交笛卡儿二维坐标或三维坐标，尽管定义不同，而其内容却是完全对等的。

As one part of the project, the dissertation is developed with thelocalization problem in mobile robot navigation. Combined with "MobileRobot 1 of Central South university (MORCS-1)", a mobile robot designed byus that equipped with a 2D laser measurement system to sense the environmentand the proprioceptive sensors such as the odometry, gyroscope to calculate itsdead reckoning, the approach about the four kind uncertainty factors of mobilerobot localization is studied. These researches include that the error analysisand calibration of position sensors is implemented to reduce the measurementnoise, the 3D kinematic model of mobile robot is built to gain the accuratepose in complex terrain, some work on the automatic detection of static ordynamic obstacles based on laser scanner is investigated to eliminate thedynamic influence of the environment and to realize the reliably absoluteposition, and lastly a robust algorithm is presented to involve the incrementalenvironment mapping and self-localization of mobile robot with unknown dataassociation and to improve the self-localization performance of mobile robotunder unknown environment.

作为该项目研究的一部分，本论文以移动机器人导航中的定位问题为研究内容，利用自行研制的装配有二维激光雷达环境感知系统，并通过里程计、陀螺仪等内部传感器来实现航迹推测的移动机器人"中南移动1号MORCS-1"，重点围绕影响移动机器人系统定位的四类不确定性处理展开研究：通过移动机器人定位传感器的误差分析及校准，旨在消除传感器噪声所带来的测量误差；通过建立移动机器人的三维运动学模型进行航迹推测，以期实现复杂地形下精确的移动机器人本体姿态感受；通过基于激光雷达的动静态障碍的自主检测等相关研究，尽量消除环境的不确定因素影响进而实现可靠的移动机器人绝对定位；通过以上研究，针对未知数据关联下移动机器人增量式环境建图与自定位的研究提出一种鲁棒的滤波算法，改善未知环境中移动机器人自定位的性能。

The original inspiration came from paper folding technique, where one hand converts a two dimensional space into three dimensions, while the other hand ensures stiffness in the direction of the folds.

最初的灵感来自折纸技术，其中一方面转换成三维二维空间，而另一方面是要确保在折叠方向刚度。

One,two and three dimensional spectra measured by this system were demonstrated.

文中给出了这种系统在实验中完成一维、二维和三维谱数据获取和显示的成功实例。

On the face of it, time is essentially one-dimensional and space is not essentially three-dimensional.

表面上看，时间本质上就是一维的，而空间不是本质上是三维的。

Physical reality does not consist of a three-dimensional space, together with a separate one-dimensional time.

自然的现实不是由一个三维的空间和一个单独一维时间构成的。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。