二维的

After simplifying the relation between Ne and time, the formula of 3D parallelbeam tomography is theoretically deduced and proved to be the same as the 2D CIT inversion formula derived by K.C. Yeh when it is applied to 2D cases.

在二维情况下，本文导出的三维平行束层析重建公式与Yeh等给出的二维电离层层析重建公式相同。

After simplifying the relation between Ne and time, the formula of 3-D parallel-beam tomography is theoretically deduced and proved to be the same as the 2-D CIT inversion formula derived by K.C. Yeh when it is applied to 2-D cases.

在二维情况下，本文导出的三维平行束层析重建公式与Yeh等给出的二维电离层层析重建公式相同。

3D solid visualization class and 3D surface visualization class have thefunction of visualizing the scalar and vector. Moreover, 3D surface visualization classcan produce 2D data file. Picture class provides function of marking on the picture.

其次，运用 VTK 标量和矢量可视化技术实现了三维数据场的矢量和标量可视化，包括三维体数据场标量和矢量单视区显示及三维体数据场剖面标量和矢量单视区/四视区显示；使三维面数据可视化类具备了三维面数据场标量单视区显示功能和剖切面生成二维数据文件的功能，并且在三维面数据可视化类中内嵌了数据预处理算法。

The relationship between the coordinates on the 2-Dimension plane and the coordinates in the 3-Dimension space has been established by using of the Neuron Network in this paper.

犁体曲面的展开是将三维空间点的尺寸数据向二维平面上进行近似展开，每一个三维点都有一个二维点与其对应。

Methods 68 cases with hydrosalpinx admitted to our hospital from April 2005 to September 2007 had underwent traditional transabdominal ultrasound and transvaginal ultrasound.

对我院2005年4月-2007年12月收治的68例输卵管积水患者进行传统的二维经腹扫查和经阴道扫查，常规二维经阴道超声仔细扫查卵巢周围，当探及卵巢旁腊肠样或串珠样无回声，开启三维表面重建及能量多普勒重建扫描程序，进行容积扫查。

The two-dimensional structural units (such as silicon-oxygen tetrahedral sheet, octahedral sheet), interlayer space are assembled according to the sphere close packing manner, and the close packing layers parallel to {0001}. There are several mechanisms to release the difference in size while the silicon-oxygen tetrahedral sheet and octahedral sheet assemble the TO and TOT-type structural layers. The two types of structural layers with different interlayer space fitted together in six kinds of assembling modes and formed six kinds of crystal layers. The combinatorics analysis of the two-dimensional structural units revealed that there may be 28 kinds of TOT type interstradified minerals in six kinds of polysomatic assembling modes of interatradified structure. The structural layer is symmetrical for octahedron sheet in the structure of interstratified minerals and shows polarity characteristics.

结果表明，不同二维结构单元体（包括硅氧四面体片、八面体片、层间域的构筑基本符合球体紧密堆积原理，紧密堆积层平行{0001}；四面体片与八面体片构筑TO和TOT结构层时采取多种机制消除二者在二维尺寸上的差异；两种模式的结构层与不同类型的层间物组装形成六种组装模式的晶层；并通过二维结构单元体的组合规律的分析，计算出可能存在的28种TOT型间层结构，它们分属于6种间层结构多体性组装模式；间层结构中，结构层对于八面体片是不对称的，并在属性上表现出极性特征；间层矿物的晶层类型可用6种多体性组装模式加以表达。

Based on summing-up of the existent design method of two-dimensional and three-dimensional inlets,a parametric design method of two-dimensional hypersonic inlet was established by analyzing the restrictiveness and sensitivity of the geometric parameter of the inlet.

在归纳二维进气道和三维侧压式进气道设计方法的基础上，通过参数制约关系分析和参数敏感性分析，提出了二维进气道的参数化设计方法。

Through 2D axial symmetrical and 3D scarfed reversal nozzle calculating, the main flowfield characters were given, and compared with the experiment data for validation. Then, the program was given, which can well predict the performance of the scarfed reversal nozzle. In this paper, the flowfields of open cavities with different structures and different parameters were calculated. Some new, full and more reasonable mechanism interprets were given. We think that the essential cause of pressure oscillatory is coherent effect of wave, eddy and cavity structure, but the procedure is different with different cavity structure, it can not use single procedure to described.

通过对二维轴对称和三维斜切反喷管的计算分析，本文给出了流场的主要特征，并采用实验数据进行了验证，形成了分析斜切反喷管可靠的应用方法；本文通过对不同结构形式、不同参数的二维、三维非定常超声速开式空腔流动进行的计算分析，提出了较为全面、合理的空腔压力振荡循环机理的解释，本文认为压力脉动本质上是波、涡以及结构之间相互的干扰和耦合，但干扰的具体过程随空腔结构的不同差别较大，不能采用单一的规律进行描述。

In this method, the user creates a 2d shape which traces the outline of an object from a photograph or a drawing. The user then uses a second image of the subject from a different angle and extrudes the 2d shape into 3d, again following the shape's outline.

在这种方法中，用户创建一个跟踪照片或者素描中物体轮廓的二维形状，然后，根据另外一张不同角度的照片将按照轮廓从二维形状拉伸到三维。

In Chapter 4, the Thwaites＇s method for 2-D laminar boundary layer and the Truckenbrodt＇s method for 2-D turbulent boundary layer are developed to solve the"quasi-3-D"equations for the 3-D boundary layers on rotating helical blades, and a integral method, which can be solved by iteration, is resulted.

在第4章中，计算二维层流边界层的Thwaites方法和计算二维湍流边界层的Truckenbrodt方法被推广用以解关于旋转螺旋面上三维边界层的&准三维&方程，得到一种可迭代求解的积分方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。