三维

Objective: To explore a feasible method and its significance of 3 - dimensional reconstruction in nasal cavity and ethmoid sinus.

三维重建技术是指通过图像处理和分析方法由二维生成和摄取人体三维组织结构，目前多用于CT 和MRI影像学。

The field solutions are verified by both an analytical two-dimensional algorithm and three-dimensional finite element software. A rapid method is presented for extensile analyzing and optimizing Halbach cylinder magnet.

通过其二维解析解和三维有限元软件验证了本文推导的三维场解，为分析和优化应用日益广泛的Halbach磁体结构提供了一种快速灵活的分析方法。

The mathematical programming formulation and related solution procedure are established by the traditional BEM. Through the discretization of space and time, the elastoplastic stress simulation method and reduce-basis technique are adopted to construct the self-equilibrium stress field. The numbers of variables and constraint equations in the resulting mathematical programming formulation are reduced greatly and then the dimension obstacle of computation in 3-D limit and shakedown analysis is overcome.

采用常规边界元方法建立了三维结构极限与安定分析的数学规划格式，通过对时间和空间的离散化，并采用弹塑性模拟法构造自平衡应力场和引入减缩基技术，大大减少了所形成的数学规划格式中的未知变量和约束方程的数目，有效地克服了三维结构极限与安定分析中的维数障碍问题。

For the first time, in [3] the authors discussed the inequalities of B-B and by using them the authors give a proof of the existence and uniqueness of the generalized solution for magnetostatic field problem with zero boundary value. By using the inequalities of B--H in, in[-5,6] the authors give a proof of the existence and uniqueness of the generalized solutions for 3-D magnetostatic field Neumann problem and 2-D magnetic field first boundary value initial problem.

前人已讨论了B—H间的几个基本不式，并由之证明了三维静磁场带零边值问题广义解的存在与唯一性，作者也曾利用给出的B—H间的不式证明了三维静磁场Neumann问题和二维时变场第一边值初值问题广义解的存在与唯一性。

Using computer to control camera to shot the object continually and process the image timely, the pels coordinates of the laser can be get accurately. The 2-D coordinate can be changed to 3-D coordinate based on the arithmetic model builded and the automatic measurement is completed after the object can be rebuild as point cloud.

利用计算机控制摄像头对实物进行连续拍摄，并对图像进行实时处理，从而获得精确的激光线上的像素点坐标，利用建立的算法模型，将已知的二维坐标转换成三维坐标，以点云信息的形式重构出物体，完成三维自动测量。

Some questions in digital elevation model were discussed detailedly, such as the obtaining of data points, the fast searching of reference points, the interpolation algorithm of quadric surface, the abnormal data eliminating, and so on. And this paper has realized the 3D vectorization of 2D terrain maps, the 3D display and edit of DEM data with the help of secondary development of CAD.

文中详细讨论了数字高程模型中数据点获得、参考点的快速搜索、二次曲面的插值算法、粗差剔除等内容，并运用AutoCAD二次开发技术，实现了二维地形图的三维矢量化以及DEM数据的三维显示和编辑修改。

With respect to the 3D modeling, the Delaunay Triangulation constructing method of 2D scattered data set is discussed firstly. The triangulation method of 3D surface data set of 3DLCS is analyzed by basing on the DT constructing problem of 2D scattered data set.

在三维构型方面，本文首先论述了二维散乱数据点集的Delaunay三角形化构造方法，然后以此为基础分析了3DLCS中的三维表面数据集的三角形化方法。

As reconstruction of a 2-D image on a spherical surface actually creates a three dimensional (3-D) displays, this technique may plays an important role in attempts at reconstruction of 3-D images from CGHs.

募扑慊D？二维图像重现于球面实际上了产生三维显示，因此上述方法在从计算全息图重现三维图像方面起到重要的作用。

The stability of system equilibrium point and the existence condition of 3-D Hopf bifurcation as well as the stability of hence generated periodic solution were analyzed, so that the existence of limit cycles on the two-dimensional stable manifold of one microbial species and its nutrition was verified when other one had the disadvantage in the competition so as to become extinct.

研究当营养消耗率δ1＝δ1为一般的非减连续函数和δ2＝常数的三维Chemostat模型，分析系统平衡点的稳定性，三维系统经历Hopf分支的条件和由此产生的周期解的德定性，证明系统中某一微生物物种处于竞争劣势而趋于灭绝时另一微生物物种和营养的二维稳定流形上极限环的存在性。

The stability of system equilibrium point and the existence condition of 3-D Hopf bifurcation as well as the stability of hence generated periodic solution were analyzed,so that the existence of limit cycles on the two-dimensional stable manifold of one microbial species and its nutrition was verified when other one had the disadvantage in the competiti.

研究当营养消耗率1δ=1δ为一般的非减连续函数和2δ=常数的三维Chemostat模型，分析系统平衡点的稳定性，三维系统经历Hopf分支的条件和由此产生的周期解的稳定性，证明系统中某一微生物物种处于竞争劣势而趋于灭绝时另一微生物物种和营养的二维稳定流形上极限环的存在性。

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。