三维

In general, most 3D parametric design systems use plane and sphere as basic tools to draw a three-dimensional diagram. In this paper, we introduce a class of new drawing tools: conicoid.

通常大多数三维参数化CAD系统都只用平面和球面作为最基本的作图工具，这在某种程度上限制了三维参数化CAD系统的作图范围。

We prove that a diagram can be drawn with conicoid sequentially if and only if it can be described by a set of triangular equations of degree less than nine.

同时证明了一个三维几何图形可以用平面、球面和圆锥曲面构造出来的充分必要条件是这个三维几何图形可以用一个三角化的次数小于9的代数方程组来描述。

Using the MATLAB, several type of array structure was contrastively analyzed.

利用MATLAB仿真工具，对几种典型阵列结构进行了对比分析，提出了2种新型的三维麦克风阵列：均匀球面阵和三维均匀直线阵。

Methods Nineteen bone impacted and unerupted teeth in 18 cases selected by orthopantomograph were scanned by 3DX-CT with 1.0 mm slice thickness. Images obtained by 3DX-CT (horizontally, sagittally, coronally) were analyzed after multi-plane reconstruction and 3D reconstruction including the angle of the bone axis impacted and unerupted teeth; maximum radius of the coronal teeth; distances between the tooth and the cortical bone around; distances to the neighboring tooth roots and nerve forum canal; the thickness of the bone tissue, etc.

对经曲面断层片筛选出的18例19枚埋伏牙进行牙科三维CT检查，扫描层厚1.0mm，重建后进行图像三维断面显示（包括水平位，矢状位，冠状位），对牙位图像进行分析及测量（包括埋伏牙牙长轴的角度，牙根弯曲度，牙冠的最大径，与骨皮质的距离，与邻牙根、神经孔／管的距离；骨质的厚度、高度等）。

Methods : Original data of patients＇craniofacial hard and soft tissues by CT scanning was transferred into the system.

目的：构建基于CT影像数据的颅颌面硬软组织三维可视化模型，为进一步的三维分析诊断、手术模拟和预测构建基础平台。

The 3D reconstruction could display craniovertebral junction independently or jointly. Any diameter of the structures reconstructed could be measured discretionarily at any angle.

三维重建结构可以单独或联合显示，甚至可行结构的任意取舍，重建结构的任意径线及角度均可进行适时三维测量。

Can a complex three-dimensional drawing using PROE to draw, his parts drawing using PROE mapped the company main product cycloidal reducer, etc, and assembly of three-dimensional graph explosion.

可以用PROE进行较复杂三维零件的绘制，自己用PROE绘制了公司主打产品摆线减速机等的三维装配图，以及爆炸图。

In order to tackle this problem, to digitalize the manufacture of stripes and to meet the demand of stripes processing technology, we form geometric molds for stripes and provide a convenient computer describing method with a new theory.

使三维纹理的加工实现快速化、简单化，并提高了三维纹理的逼真程度。

Personal computer had affluent hand-motion tool, automatic and reciprocation extraction of diremption and extraction. Three-D visualization was very superiority.

应用三维重建方面，通过对比，个人计算机具有丰富的手动分割工具，自动或交互式图像分割与提取等功能，三维重建效果更加优秀，可满足临床需求。

The light filtrating properties were studied through the filling of 3D continuous pores with divinyl benzene as a highly refractive liquid.

研究了三维连续孔道在充满二乙烯基苯高折射液体后的滤光特性，通过引入金属离子改变固体材料折射率的方法，验证了光在高折射液相中的全反射效应，并从定性角度建立三维骨架材料的孔径及分布与透射光波长范围之间的关系，对新光学现象给出了初步解释。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。