三维

During the process of the system researching, A new mesh approach based on advancing front technique for triangle elements was studied. A practical method of generating hexahedron mesh for cellular element method through transfering lines into volumes was worked out. Moreover, a new hidden method for cellular models and a approach of forming stress images were also researched.

在软件研制过程中，提出一种基于前沿生成法的速度快、稳定性好的平面元胞元网格自动生成方法和三维六面体网格的线段转换法；根据元胞元模型的特点，提出一种稳健性较好的三维元胞元模型消隐方法；通过对应力图生成技术的研究，提出一种对等值线、色带图、浓淡图均适用的应力图快速生成算法。

During the process of the system researching, A new mesh approach basedon advancing front technique for triangle elements was studied. A practicalmethod of generating hexahedron mesh for cellular element method throughtransfering lines into volumes was worked out. Moreover, a new hidden methodfor cellular models and a approach of forming stress images were alsoresearched.

在软件研制过程中，提出一种基于前沿生成法的速度快、稳定性好的平面元胞元网格自动生成方法和三维六面体网格的线段转换法；根据元胞元模型的特点，提出一种稳健性较好的三维元胞元模型消隐方法；通过对应力图生成技术的研究，提出一种对等值线、色带图、浓淡图均适用的应力图快速生成算法。

The goal of this thesis is to research on pen-based interaction and 3D interaction Post-WIMP software interface from generic point of view, analyses the common interaction characteristics in Post-WIMP environment, and discuss the corresponding research approaches.

本文的目标在于：以Post-WIMP界面的交互特征研究为基础，分别从笔式交互和三维交互两个方面对Post-WIMP下的软件界面进行研究，提出相应的方法，建立相应的软件平台，并以此来指导基于笔式和三维的Post-WIMP软件的开发。

And the system could share with and deal with the the attribute data and image data. 3-D visualization of geographical feature information can come true by the use of virtual reality technology.

使用虚拟现实技术可以实现地理信息的三维可视化，这对实现三维电力地理信息系统具有重要意义。

This thesis is consisted of two parts: Three-dimensional Geologic Information System design and Three-dimensional Visualization.

论文的第一部分是三维地质空间信息系统的总体设计，在这部分里，论文对三维信息系统的整体框架和各种功能进行了深入的探讨。

With recent advances in 3D scanning and modeling techniques,there has been a rapid increase in the availability and size of geometric datasets.Large-scale and complex scenes consisting of hundreds of millions of primitives are becoming increasingly common in many graphics applications.

随着近几年三维扫描和建模技术的飞速发展，三维场景的规模和复杂度不断增大，大规模复杂场景的交互绘制受到了国内外研究者越来越多的重视并取得了一系列研究成果。

The improved e-N method can also yield results well agree with those obtained by DNS.4 The transition prediction for boundary layers on cones with different key parameters such as angle of attack, cone half angle and the Mach number of the coming flow, have been made, to show the reliability of the modified e-N method.5 For the calculation of base flow, boundary layer equations can be used in the case of small angle of attack.

但是它要依赖于对初始扰动的正确预估，这显然又取决于更多飞行数据的积累和分析。e-N方法的转捩预测结果与直接数值模拟得到的结果也吻合较好。4通过对不同来流攻角、不同半锥角和不同马赫数的三维圆锥边界层的转捩位置进行预测，证实了改进的e-N方法对于三维边界层转捩预测是可靠的。5对于基本流的计算，边界层方程可以用于小攻角的情况，其计算量远远小于直接数值模拟，但背风面的剖面不可靠。

Methods By using helical CT to scan a dental stone cast and capture a series digital sliced radiographs of it .

第二部分牙颌模型三维CT扫描测量分析系统的建立和研究目的建立计算机辅助的牙颌模型三维CT扫描测量分析系统并研究其可靠性。

Subdivision-Mapping Method presented in this article divides the process of hexahedral mesh generation within complex three-dimensional solid into two main steps.

为提高三维有限元建模的能力，推动有限元模拟技术的发展，开发一套完善的三维六面体网格生成与重划系统是极有必要的。

In this paper the software using the method of integral equation to calculate 3D magnetic field and another two programs which use the finite column method to calculate 3D heat field with phase transition and 2D gas-flow field are completed. These programs provide such technique as the access to large quantity data and a simple but effective method to eliminate hidden lines of objects, which are necessary for the calculating of 3D field.

本文应用积分方程法，编制了三维磁场计算软件，应用有限容积法编制了考虑相变的温度场计算软件和气流场计算软件，软件中实现了大容量数据的存储，提出一种简便的消隐方法，这些功能对于三维场的计算不可缺少。

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。