三维

On the basis of the generalized phase integral approximation and the beam displacement ray mode theory, which are both developed by Chinese acousticians, a fast method for normal modes analyzing including the leaky modes is presented. The application of this method in the coupled mode parabolic equation theory gives an efficient algorithm for both the range dependent problems (CMPE2D) and the three dimensional problems (CMPE3D).

在我国独创的广义相积分理论和波束位移射线简正波理论的基础上，提出了一种可以快速而精确地求解简正波本征值的算法，并将该算法应用于简正波-抛物方程理论，从而实现了二维(CMPE2D)和三维(CMPE3D)声场的快速预报。

Photoelasticity is applied in two- and three-dimensional stress analysis widely.

光弹性法可广泛用于二维、三维应力或应变场的研究。

Many analysis technology and space data are designed by the two-dimensional coordinates or plane coordinate, and used plain map projection methods to storage space coordinates, so many times we all need three-dimensional map projection to convert 3D geographical coordinates into the plane coordinates.

许多分析技术和空间数据都是针对二维坐标或平面坐标设计，以平面地图投影的方式来存储空间坐标，因此很多时候我们都需要利用地图投影将三维的地理坐标转换为平面坐标。

Spatial ability plays an important role in geometry learning, and the learning of net act as a transformation bridge in plane and three- dimensional figure for students.

中文摘要空间能力在国小几何课程的学习上扮演重要的角色，而展开图的学习则提供了学生从二维平面图形转与三维立体空间能力的转换桥梁。

That is because the model is based on the ideal situation to presume the viewpoint as infinitely far away from the target. So it doesn't include the information of projection plane changing.

这是由于传统的模型是基于二维的平面运动模型，假设为投影点无穷远的情况，并不包含三维透视投影平面变化的信息，因此不能处理。

In traditional 2D design process, designer converts his ideas to 2D drawing then forming assembly drawing and parts drawing. The designer's thought works between 3D ideas and lines of plane projection.

在传统的二维设计过程中，设计者首先将其构思转化成平面图，形成总装配图和各个零件图，设计者的思维一直在三维构思和平面投影的线条之间进行转换。

The discovery of [60]fullerene made us to learn of a completely new world ofcarbon: from plane molecule of low symmetry to ball shape molecule of highsymmetry, from simple molecule to supermolecule of fullerene clathrate and fromone-dimensional superconductivity to three-dimensional superconductivity.

的发现使我们了解到一个全新的碳的世界，从平面低对称分子到全对称的球形分子，从简单的分子到富勒烯笼内包原子的超分子，从一维超导到三维超导。

Poisson module is a sub-module of CHIPIC2D, which is used for solving Poisson equation by SOR iterative algorithm.

论文主要研究了CHIPIC软件2.5维版本泊松模块求解和三维版本粒子模拟的并行算法。

3D images are more effective than two-dimensional images in diagnosis and differentiation of verrucous gastritis and polypus.

三维超声较二维超声能更有效地诊断和鉴别疣状胃炎与胃息肉。

The result of simulation indicates that a 2-dimension function may be adopted to describe measuring sense field and potential distribution accord with exponential function on potential gradient line from transmitting electrode to measuring electrode.

模拟计算结果表明，三维电极阵列的敏感场最终可以用二维函数表述，在主发射电极到测量电极的电势梯度线上，电势值的变化规律符合指数函数特征。

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。