三维

At first, it analyses the visibility processing of complex scene, including: spatial partition technology BSP, quadtree, octree and equational octree which can optimize scene, category of quick visibility estimation algorithm in the 3D scene, portal which can accelerate rendering, level of detail and mesh simplification based on quadric error metrics used to simply models in 3D scene.

首先分析了复杂场景的可视化处理，包括优化场景渲染的空间剖分技术：BSP树、四叉树、八叉树、均分八叉树；其次是三维场景快速可见性判断算法的分类，可加速渲染的入口技术；最后是用于三维场景中模型简化的两个算法：层次细节模型简化技术和基于视点的二次误差度量网格简化。

The condition for a 3D polynomial map to be equivariant is theoretically analyzed and proved.

研究了基于三维多项式映射的三维广义Julia集表示方法。

D laser scan system is important one of r ev erse engineering, it is a compositive system,including numerical control,laser ,CAD/CAM,precise mechanism,computer,image collection and image processing.

三维激光扫描系统是反求工程的重要组成部分，是集数控、激光、CAD/CAM、精密机械、计算机图像采集与处理为一体的集成系统，它主要由运动控制、图像采集、图像处理、三维重构等几大部分组成。

This software take full advantage of the multimedia technique , especially the three-dimensional animation, to open out the abundant meanings and scientific theories in structural chemistry by using lush graphical interfaces, lifelike animation, lifesome sound effects, alluring exhibitive technique, translate bald contents and nonobjective theories into visual, direct-viewing, lively demonstration, change static and plane teaching method into dynamic and three-dimensional teaching process with attraction and infection, realize visual and enlightened teaching.

本软件充分应用计算机多媒体特别是三维动画制作技术以丰富的图形界面、逼真的视频动画、生动的音响效果、引人入胜的表现手法揭示了结构化学中包括的丰富内涵和科学原理，将原来枯燥的内容和抽象的理论转变为形象、直观、生动的演示，使以前静态的，平面式的教学变为动态的、三维立体的教学过程，具有吸引力和感染力，实现了形象化、启发式教学。

To study the policy about accounting transaction of exploration, development, extraction and selection according to production procedure in extractive coal industry, three-dimension presentation model of information on economic interest, social responsibility, resource and protecting environment.

按照煤炭采掘业生产程序分别对勘查阶段、开发阶段、采掘阶段和洗选阶段的会计处理，以及关于经济利益、社会责任和资源与环保信息的三维呈报模式进行政策性研究；即财务报告表述模式由主要财务报告(基本财务报表和特定财务报表)、辅助财务报告(财务报表附表和财务报表附注)和补充财务报告三维模式构成，特别是主要财务报告划分出财务报告使用者的共同需求和主要利益相关者的特定需求的基本财务报表和特定财务报表。

In my study, we use a 4F acoustic lens which f-number is 1.3 to set up a photoacoustic imaging system. With same axial and lateral magnification, 3D photoacoustic imaging system with 4F acoustic lens can detect photoacoustic signal distribution on object plane in real-time, and get the different axial distance signal to show the 3D photoacoustic image by different signal receiving time.

本研究采用相对孔径为1.3的4F声透镜，设计三维光声影像系统，利用4F声透镜景深范围内之轴向与横向放大倍率相等，即时性的重现物平面所发出的同调性光声讯号分布，并利用不同的接收时间来呈现不同深度距离的讯号成像，取得物平面上受测物的三维光声影像。

Everything you need to assemble and use your desktop fabricator aka: a 3d printer that sculpts 3d...

一切您需要收集和使用您的桌面制作者（又名：三维打印机，三维造型。。。

Results The reconstructed results successfully reappeared three dimensional structure of fasciculus inside the sciatic nerve and showed the topographic anatomy of every nerve fascicle and its relationship in arbitrary sections, and presented patterns of complicated recombination of nerve bundles in the whole length.

结果 三维重建真实地再现坐骨神经内部各神经束的三维立体结构，并可显示坐骨神经中神经束的任意断面及其全长的解剖结构与相互关系，形象地展示坐骨神经内部神经束的复杂重组过程。

It is a useful and practical way to reconstruct the three-dimensional structure of fasciculus in the peripheral nerve by taking human hair as the registration material and combining with soft-aided registration method.

采用人发作为定位材料，同时借助计算机软件辅助定位的方法，人体坐骨神经内部神经束三维结构的重建取得较好的效果，因而是一种较为实用的周围神经内部神经束三维重建的方法。

The results show that the microscopical pore structure of the three dimensional orthogonal woven carbon fabric structure perform is composed of body-centered cubes which arranged periodically at spaces. The net structure and shape of the pores of perform are determined by the size and proration of the fasciculus diameter, which are key factors influencing the gaseous permeability and final density of composites. Once the proration of the fasciculus diameters of different directions is determined, the trend of diversification of the permeability followed by pore rate during CVI process and the density of composites are stated, and the permeability increases with the increase of the fasciculus diameter.

研究结果表明：三维正交结构炭纤维预制体的宏观孔隙结构在空间上可以看成是由呈周期性排列的体心立方"晶胞"构成； X ， Y 和 Z 3个方向纤维束直径大小及比例关系决定三维正交结构炭纤维预制体宏观孔隙网络的结构和形状，也是决定反应气体在孔隙中的比渗透率和复合材料最终致密度的重要因素；当 X ， Y 和 Z 3个方向纤维束直径的比例关系一定时，不同预制体在CVI增密过程中比渗透率随孔隙率变化的趋势相同；复合材料的最终致密度一定；比渗透率随纤维束直径增大而略有增大。

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。