Conclusion : on the base of three - dimensional model of neck , to match display these structures will guide to the operative procedure of anterior cervical approach and provide morphologic data for preoperative practise and simulation 结论：在颈部三维可视化模型基础上，参照颈前入路手术步骤可逐层显示该手术相关的重要结构，为该手术的术前训练和模拟提供形态学依据。
4 . the technical principles and methods of gis - based flood routing dynamic visual simulation for river , storage and detention basins are proposed . at the same time , the establishment process of three - dimensional visual models is analyzed , and the general framework 4 .提出了基于gis的河道、蓄滞洪区洪水演进可视化仿真技术原理与方法，分析了洪水演进可视化模型的建立过程，设计出河道、蓄滞洪区洪水演进系统的总体结构及开发模式，并介绍了系统具体功能的实现。
Using latest visual software idl ( interactive data language ) and combining trigrid function with triangulate function in idl , regular network terrain model and 3 - d shallow and deep sliding surface model of zhafangping landslide body based on delaunay triangular network is set up . it makes the sliding surface turn from " recessiveness " into " dominance " , and gets numerous different three - dimensional cubic chart , contour topographic map , the combine model of terrain model and contour topo - graphic map . and every visual model has analysed and compared in detail 利用可视化软件idl中的triangulate函数和trigrid函数相结合，建立了基于delaunay三角网的榨坊坪滑坡体规则格网地面模型和浅层、深层滑动面三维可视化模型，实现了该滑坡体的三维模拟与再现，使滑动面由“隐性”变为了“显性” ，且获得了众多不同角度的三维立体图、等高线地形图和地面模型与等高线地形图的组合图等，并对各可视化模型进行了详细地分析与比较。
On the basis of studying the models and the algorithms , a description language which can manage models and combine visual models and a tool which is applied to create combined model are designed and implemented . and the language and the tool can combine the elementary models visually to construct models for solving more complex problem 在研究模型和算法的基础上，设计并实现了模型管理和可视化模型组合生成工具，能可视化地将基本模型进行组合，从而构造解决更复杂问题的模型。
Result : the c3 to c7 , intervertebral discs , spinal cord , cervical nerves , vertebral artery , longus colli , larynx ( trachea ) , pharynx ( esophagus ) , common carotid artery ( internal and external carotid artery ) , internal jugular vein , vagus nerve and sternocleidomastoid were successfully reconstructed and displayed 结果：成功重建并立体显示第3 ~ 7颈椎、椎间盘、脊髓、颈神经、椎动脉、颈长肌、喉（气管） 、咽（食管） 、颈总动脉（颈内、外动脉） 、颈内静脉、迷走神经和胸锁乳突肌等解剖结构的位置关系，建立了颈前入路相关结构的三维可视化模型。
To realize the emulation of the interactive three - dimensional figure movement that controlled by the ways of many kinds of movement , we will face many problems such as how to receive the control data that the user delivers , forms the data collection , and constructs the physical model from data set to build visual model , how to realize the three - dimensional animation and export the data 实现多种运动方式控制的交互式三维图形运动仿真，面临着如何接收用户发送的控制数据，构造数据集，从数据集构造物理模型，建立可视化模型，如何实现三维动画，输出数据等问题。
On the basis of this model , the thesis . further treats topics in constraint design process , such as constraint interpretation design , constraint modification , constraint control , etc . allowing for the hierarchical nature of design constraints , we bring forth a hierarchy visualization model of die constraint information 基于这种表示模型，论文首先就约束设计过程中的约束解释设计、约束编辑、约束控制等问题做了探讨，然后，依据工程约束层次性的特点，提出了一种冷冲模约束信息层次可视化模型。
Based on the characteristics of the geological exploring data , a method for establishing data model was presented , in which the triangle network was combined with the quadrangle network . at last , the geologic maps needed for geological research were drawn through the gdi ( graphics device interface ) and the 3d visualization system model was established for stratumtous geological body . base on the achievments mentioned above , a software system was developed which can be used independently without relying on any software platform 文中首先介绍了可视化技术以及地质制图技术的发展，然后对地质构造可视化模型进行了研究，根据地质测量数据的特点，提出了三角形网和四边形网相结合的数据建模方法，最后通过图形接口绘制了地质研究所需的地质图件，构建了层状地质体三维可视化系统模型，并开发出了可以独立于任何软件平台使用的地质三维可视化软件系统。
