三维

In this paper,from the global viewpoint we first define the nonlinear control system on a two dimensional surface in the three dimensional Euclidean space, give the represwentation of the state equation under a loca coordinate sysgtem of the surface, and study the connectin between the equilibrium state of the nonlinear system and the egodesics on the surface.

我们首先从整体化的观点定义了一种建立在三维欧氏空间的二维曲面上的非线性控制系统，并给出了在曲面的局部坐标系下非线性系统状态方程的表达式，研究了非线性系统的平衡态与曲面的测地线之间的关系。

A three-dimensional anisotropic etch rate distribution of Si can be described by two-dimensional etch rate distribu-tions in a series of crystal planes.

硅各向异性腐蚀速率三维分布可由一系列晶面上的二维腐蚀速率分布表示。

At first, the velocity which is the outlet velocity of 2-D numerical model by using the VOF and κ~εmodel is used as the inlet velocity of the 3-D numerical model. The control equations of 3-D water and sediment movement are described in the orthogonal curvilinear coordinates, and the equations is segregated by using the Finite Volume Method.

以二维的水气两相流的VOF 模型结合雷诺时均法的κ~ε双方程模型进行水气两相流计算，得到稳定流场作为三维水沙计算的初始进口条件。

In addition, three-dimension scattering characteristics of aplane wave by a cylindrical conductor are described by applying reduced matrix.

应用平面波谱技术将高斯波束展开成平面波序列，然后利用叠加原理及圆柱导体的边界条件推导了基模高斯波束入射单个圆柱导体的二维散射场公式，应用约化矩阵描述了平面波入射单个圆柱导体的三维散射特性。

During construction, typical sections are selected to carry out the temperature field test and the elevation of girder of T structure is measured synchronously. The changing character of temperature gradient and its 2 key parameters are generalized and the deflexion of"T"structure is analyzed in view of temperature field.

在施工过程中，选取典型断面进行了温度场试验，并对最大悬臂状态的T构主梁的线形进行了同步观测，总结了温度梯度及其两个主要参数的变化规律，将三维温度场问题简化为一维温度梯度问题。

Gz horizontal gradient module, for the first time, is used to delimitate the3D geologic body"s boundary,?gzx is used to delimitate the 2D tabular body"sboundary.

首次提出采用Δgz水平梯度模方法定位三维地质体边界、Δgzx方法定位二维板状体边界。

This method dexterously inverts the three-dimension problem into two dimension and properly uses interpolating method. It also can be applied in the other sensor that has same problem.

该方法巧秒地把一个三维的问题转化成二维问题，并加以合理地应用插值数学方法，可以推广应用到存在相似问题的其他类型传感器中。

Meanwhile the interesting structures of the five azido-bridged complexes containing a series of bi diazine ligands indicate the varieties of azido ions in designing polymeric archi

2五个高维叠氮桥cd配合物(10一14)：化合物10、n为不同桥联方式的二维(6，3)层状结构，而12一14具有相同的三维(10，3)聚合网络结构。

Ship motion has go through two–dimension to three-dimension in theory .

在理论上，船舶运动方程也经历了从质点运动到二维再到三维的变化。

A new formula for the calculation of reinforcing bars of the orifice is proposed, based on experimental and two and three dimensional analysis.

根据模型试验和二维、三维非线性分析结果，提出了新的拱坝孔口结构配筋公式。

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。