三维

In the second part of the thesis, we discribed the established technology platform of MLEM and Bayesian reconstruction methods for two and three dimensional datasets. The platform is flexible compared with commercial software and it helps researchers to test and develop new mathematical models in the future.

第二部份则是建立MLEM法与贝式重建法在二维与三维资料模式下的技术平台，除了可不受商业软体的限制外，亦有助於研究者对於新数学模型的测试与开发。

Two and three dimensional steady/unsteady Euler codes are developed to study the hot streak in multistage turbine cascade.

采用商用软件对涡轮级的二维／三维、定常／非定常粘性流动进行了广泛的数值研究，详细分析了热斑现象的特点及一些影响因数。

Here, on the basis of two-dimensional bar code, a new type of bar code, three-dimensional bar code is designed.

在二维条码的基础上，本文设计了一种新的条码--三维条码。

Polymers may consist of long chains of unbranched or branched monomers or may be cross-linked networks of monomers in two or three dimensions.

聚合物可能包含由无支链的或有支链的单体组成的长链，也可能是单体连接的耳维或三维网状结构。

Polymers may consist of long chain s of unbranched or branched monomers or may be cross-linked networks of monomers in two or three dimensions.

聚合物可能包含由无支链的或有支链的单体组成的长链，也可能是单体连接的耳维或三维网状结构。

The thickness of the ice cover on the wall surface heat transfer is greater than the thickness of it on the air heat transfer form. The thickness of the ice cover on the wall surface heat transfer along the way changes slowly, but it on the air heat transfer along the way changes significantly. Reducing the entrance velocity, lowering the wall surface or air temperature, the formation of the thickness of the ice cover will increase; in the 3D circumstances, The thickness of the ice cover was relatively uniform in the import of the U-turn model, the ice cover was gradual accumulation in the convex bank when the stream traversed the import of the U-turn model, the thickness of the ice cover in the convex bank was significantly bigger than the thickness in the concave bank. The temperature field under the ice cover tends to be complex because of the existence of the secondary flows. The temperature in the convex bank is greater than it in the concave bank. Compared with the data from experiments, the laws in the numerical simulation are similar with them in the experiments

模拟结果显示：二维情况下，运用壁面传热形成的冰盖厚度大于运用空气传热形成的冰盖厚度，壁面传热形成的冰盖厚度沿程变化缓慢，而空气传热形成的冰盖厚度沿程变化明显，减小入口流速，降低壁面或空气温度等，形成冰盖的厚度都会增大；三维情况下，弯道入口处凸、凹岸形成的冰盖厚度基本相同，进入弯道后，凸岸形成的冰盖厚度逐渐增大，而凹岸的冰盖厚度逐渐减小，受横向环流的影响，冰盖下水流的温度场趋向复杂，并且凸岸的温度小于凹岸的温度；与实验室实验所得数据相比较，数值模拟研究得到的规律基本符合实验规律。

A new method for automatic vanishing point detection on the image plane is proposed, which is based on a combination of line clustering and cross point statistical testing.

利用直线聚类和统计分析方法自动地实现对二维图像中提取出的消隐点的位置测算，对后续摄像机标定和三维建模十分有用。

According to the current status of the research of 3D spatial data model,a grid representation of 3D vector model is presented,which represents the 3D spatial structure by recording the key points couple on the 2D grid.

根据三维空间数据模型的研究现状，提出了一种三维矢量模型的栅格表示方法，该方法采用在二维栅格上记录关键点对的方法来表示三维空间结构，能够表达空间中存在复杂断层的情况。

It is time-consuming. The dissertation basis the laser scan data organization form of two dimension grids, the three-dimensional point directly relation to vicinage region point, the new corresponding point will produce from the neighbor region.

本文根据激光扫描数据二维网格的组织形式，三维点的邻域关系直接体现在距离图像象素点的邻域关系上，因此对应点周围的点也有可能产生新的对应点，所以采用在已知对应点的邻域内局部搜索新的最近的点对，提高搜索的效率。

By the end of 2005, SiWu has made achievements of the seismic acquisitions of 154,200 kilometers in 2D and 4807.75 square kilometers in 3D, 110,000 square kilometers in gravitational, magnetic, and electrical surveying, over 900 promising regional structures and traps, over 500 wellsite recommendations and hundreds of exploration reports.

截至2005年年底，第四物探大队共完成二维地震15.42万剖面千米，三维地震4807.75平方千米，重、磁、电勘探11万平方千米，发现有价值局部构造和圈闭900余个，提供500余口井位建议书，提交了数百份勘探成果报告。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。