三维

The development of 3D tolerance analysis softwareBased on the presented variation model and analysis method, by using C++, a 3D tolerance analysis software for auto-body assembly, AVAS, is developed and this software has applied for registration.

4三维偏差分析软件系统开发以三维偏差模型及求解方法为核心算法，采用Visual C++为开发工具，开发车身三维复杂装配偏差分析系统AVAS。

Taking velocity moment as controlled variable, the formulas were deduced to calculate quasi-3D inverse problem for uniform stream model of guide pulley. According to the theory of two relative flow surfaces and the force analysis of air bubble, the formulas were deduced to calculate quasi-3D direct problem while gas and liquid running in the guide pulley of multiphase pump, and a method was provided to carry on quasi-3D numerical calculation of inner flow filed.

以速度矩作为控制参数，推导出多相泵导轮中均匀流模型的准三维反问题计算公式；基于两类相对流面理论及气泡的受力分析，推导出气、液两相在多相泵导轮中运动的准三维正问题的计算公式，提出一种对多相泵导轮内流场进行准三维数值计算的方法。

In the actual progress of data acquisition, we chose different terrain conditions, different survey instrument (RTK, Total Station and leveling instrument) and different sampling intervals (10m, 20m, 30m).

对公路三维勘测设计的数字高程模型的数据采集方法提出建议，同时设计一套公路三维透视系统，这对于公路三维设计具有一定的辅助作用。

On the basis of former studies,this paper mainly focuses on the conversion of 3D model data,the simplification of 3D models,the construction of 3D model library,the edition and management in the virtual geography scene.

本文在已有研究成果的基础上，围绕虚拟地理场景中的三维模型数据转换、三维模型简化、三维模型库建设和虚拟地理场景的编辑、管理等关键技术展开。

Pieces of faulty molar tooth point cloud data were obtained through the 3D measurement.

本文采用自制三维激光测量仪对牙颌表面数据进行三维测量，获得了单颗后磨牙缺失的牙颌模型多片三维点云数据。

By using two different three-dimensional source distri- bution techniques, three-dimensional translating-pulsating source (3DT) and three-dimensional pulsating source (3DP), numerical investigations have been carried out for a high speed monohull ship (RD-200) advancing in oblique waves. The numerical results are compared with experimental values obtained from wave load tests carried out at the SSPA. These extensive test results cover different wave directions at a wide range of wave frequencies.

本文在高频运动的假设之下，使用一种简化的三维振荡(3D pulsating)格林函数，3DP，以及与实际波系接近的三维前进－振荡(3D Translating-pulsating)格林函数，3DT，对於一艘高速单体船(RD-200)进行斜浪中规则波之波浪动态压力负荷分析；理论计算将以两种三维源点法进行波浪负荷评估并与由船模试验加以验证，船模实验於瑞典SSPA方型风浪水槽进行。

When the top shape of osteotomes was flat,displacement and tensile stress and compressive stress were the minimum.

本实验采用三维有限元法，通过建立上颌骨三维有限元模型，模拟骨挤压器3种顶端形状，对比探讨不同顶端形状时，骨挤压器-骨组织界面的应力和位移情况。1材料与方法1.1上颌骨三维有限元模型的建立参考张彤等建立上颌骨

Based on a new three-dimensional topology-related grain growth rate equation proposed recently by MacPherson and Srolovitz, a set of analytical quasi-stationary grain size distributions were obtained.

以MacPherson-Srolovitz提出的三维个体晶粒长大拓扑依赖速率方程以及三维晶粒组织的晶粒尺寸--晶粒面数间的抛物线型统计关系为基础，导出了相应的描述三维准稳态晶粒尺寸分布的函数族。

The hydrodynamic performance and the calculation of induced velocity along flow on the constant point after foil shows that if the effects of tip vortex and decay of vortex panel strength be considered, the accuracy of calculation can be increased. Velocity peak value in propeller wake current and distribution of induced velocity after three-dimensional short foil else can be calculated accurately.

通过对三维短翼的水动力性能和翼后给定点沿流向的诱导速度计算表明：采用考虑翼梢涡影响和涡的衰减影响的计算模型，可以提高三维短翼的水动力性能计算精度；可以准确地计算出螺旋桨尾流场的速度峰值；可以较好地计算出三维短翼翼后的诱导速度分布。

The model of 3-dimensional stretching vortex ring of turbulent elliptic jet in crossflow are discovered for the first time. It is pointed out that in the evolution of turbulent jet in crossflow the 3D vortex rings, which stretching, distorting, swing in transverse direction and twisting around the stream-wise, play the leading role in the large-scale coherent structures. The counter-rotating vortex pair observed in the literature is in fact the head of the 3-dimensional vortex ring.

首次发现和提出了湍流横向椭圆射流的三维拉伸涡环模型，指出在其大尺度拟序结构中真正占主导作用的是拉伸、扭曲、沿流向扭动、展向摆动和绕x轴的转动的三维涡环，在众多实验和文献中观察到的反向涡对其实是由三维涡环头部组成。

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。