查询词典 3D

In this paper I proposed a method, which describes 2D complex structure with closed curved plane and for 3D complex structure with 3D closed block.

本文提出了用封闭面描述二维复杂模型，用封闭块描述三维复杂模型的方法。

Key words:3D model segmentation,cluster segmentation,3D point cloud,K-means cluster

提出采用K-means聚类分析方法对三维点云模型进行分割。

Based on the CAD technology of 3D feature modeling and virtual assembly etc,3D design and digital prototype of coin wrapping machine were carried out with Pro/E.According to dynamic simulation and interference investigate,the feasibility of design was tested.

在开发过程中采用基于3D特征造型和虚拟装配等CAD技术，应用Pro/E软件实现了该硬币包装机的三维设计和数字化样机的建立；通过动态仿真和干涉分析，验证了设计方案的可行性。

But it is wrong to think of Katana as just a 3D lighting package with 3D compositor tools.

但它是错误的卡塔纳仅仅当作一个三维排字三维照明工具包。

Secondly, the knowledge induced from experience, sample knowledge, model quantified knowledge are integrated organically in the field of ship design. The compound knowledge model is raised. A standardized modal system of compound knowledge in intelligent 3D-layout design of ship compartments is set up, by using object-oriented classify-decomposed relation and mixed knowledge expression of frames, regulars and methods. The intelligent support system of intelligent 3D optimal layout design of ship compartments is established based on compound knowledge base and inference engine.

其次，将船舶布置设计领域中经验归纳性知识、实例样本知识、模型数量化知识三者有机集成，提出了复合知识模型；结合舱室智能三维布置设计采用面向对象的知识分类分解关系及用框架、规则、方法的混合知识表达形式建立了一套复合知识规范化的形式描述体系，介绍了相应的推理机构造方法，提出了基于神经网络的舱室布置设计实例检索模型，并首次将其用于舱室布置设计实例的检索。

Enploying the coupling concept of 2D and 3D models, the initial and boundary conditions for 3D simulation of local area were provided by 2D numerical results, So the calculated results possessed excellent accuracy and rate of converg...

利用导截流数值实验室的实时数值试验，给出导截流过程关键部位的三维流速分布及水位分布，并与实测值吻合良好。这表明导截流水流特性数值实验室所采用的数值模拟技术合理可靠。

In this paper, the 3D FEM models of cone-tread and worn-tread locomotive and vehicle wheels are firstly established, which come into contact with the rail of standard size. There hasn't been any more refined 3D FEM computation model of wheel/rail up till now. The elastic effect of crosstie and roadbed is also considered.

本文建立了锥形踏面、磨耗形踏面的机车和车辆车轮分别与标准轨道相接触的三维有限元计算模型，模型还考虑了轨枕和部分道床的弹性作用。

In this paper, the 3D FEM models of cone-tread and worn-tread locomotive and vehicle wheels are firstly established, which come into contact with the rail of standard size. There hasnt been any more refined 3D FEM computation model of wheel/rail up till now. The elastic effect of crosstie and roadbed is also considered.

本文建立了锥形踏面、磨耗形踏面的机车和车辆车轮分别与标准轨道相接触的三维有限元计算模型，模型还考虑了轨枕和部分道床的弹性作用。

Moreover, they are not suitable for gears manufactured by different cutting tools. Based on gear generation principle, a new method to establish accurate 3D solid model of cylindrical gear by mechanism function of Pro/E is proposed. Taking the manufacture of spur-gear with pre-grinding hob as an example, this method is introduced in details and the accurate 3D solid model is set up.

以范成法加工齿轮的原理为理论基础，介绍在Pro/E平台下利用其机构模块的"轨迹曲线"功能精确构建各种刀具加工出来的渐开线圆柱齿轮齿廓曲线的方法，并以磨前滚刀加工直齿圆柱齿轮为例，详细介绍该方法的使用步骤，构建其精确的三维实体模型。

Using finite difference time domain method, the electromagnetic field distribution of THz wave is simulated in a THz 2D PC splitter and by plane wave expansion method the dispersion relation and defect modes are achieved in a THz rotated PC waveguide.5. A woodpile three-dimensional (3D) PC with face-centered-tetragonal symmetry is one of the most popular 3D PCs because of its favorable band gap characteristics. Based on the woodpile fct lattice structure, we propose a novel woodpile THz lattice structure with comparatively decreased symmetry, better band gap properties and easy fabrication by varying some structure parameters.

计算结果为利用非线性光学差频方法产生THz辐射源的实验研究提供了深入和全面的理论基础；四、利用平面波展开法，通过改变二维THz光子晶体的结构参数，对二维THz光子晶体完全带隙进行了优化，分析出两种适合工作在THz波段的二维光子晶体结构；采用时域有限差分法和平面波展开法，计算出THz波在二维光子晶体"T"型分束波导，45度旋转波导中传输的电磁场分布以及缺陷模；五、Woodpile面心立方四角结构是三维光子晶体中被研究最广泛的结构之一。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"