According to the parameters of some primary parts, a virtual sample machine mode would be founded, by structure and optimization design for whole machine through 3d image software.
根据已得各主要部件的设计参数，利用3d图像处理软件对整机进行结构设计及优化，建立机构的虚拟样机模型。
The method to design 3D virtual helmet display optical system is presented based on the software of ZEMAX and the properties of eyepiece. A design example is given.
根据目镜光学系统原理，采用ZEMAX软件来确定3D虚拟头盔光学显示系统的结构设计方法研究和性能优化。
The method and technology of virtual 3d assembly are discussed, and the method of the valve assembly CAD design and emulation concept-oriented design is pointed out in the paper.
探讨了面向概念设计的产品虚拟三维装配建模过程和三维建模方法，提出了面向概念设计阀门装配CAD设计与仿真的思想和方法。
The system can create a virtual 3d space where the design of structure will be finished. Therefore, the designers can check the availability of instrument design.
该系统可以建立一个虚拟三维空间，仪器仪表的结构模型就建立在该空间中，开发人员由此可以检验仪器仪表机构设计的有效性。
An 3d human body model and analysing of its reach-space are important to ergonomic design, motion control of human joint and collision detection of human model in virtual environment.
建立三维人体模型以及分析人体肢体可及空间，对于人机工程设计、人体关节运动控制和人体模型的碰撞检测研究都具有重要的意义。
The study is mainly focused on the system interface among digital photogrammetry, GIS and Virtual reality, 3D modeling, ; texture making and virtual environment design.
着重研究解决了全数字摄影测量系统、GIS与虚拟现实系统之间的数据接口问题，三维建模，纹理制作及虚拟环境生成等问题。
For that, we use VRML to construct the 3d virtual space and provide some tools for users to participate the design process.
为此，我们选用了VRML作为实现三维数字城市的语言，并基于VRML相关技术实现了帮助用户参与三维数字城市设计的工具。
The paper research the problem of bow to build the model of cutter with the design technology of virtual product, and built the 3D models of twist drill, gang drill, gear hob;
讨论了用虚拟技术对复杂金属切削刀具进行建模的问题，建立了麻花钻、群钻、齿轮滚刀的三维数字模型；
The paper research the problem of bow to build the model of cutter with the design technology of virtual product, and built the 3D models of twist drill, gang drill, gear hob;
讨论了用虚拟技术对复杂金属切削刀具进行建模的问题，建立了麻花钻、群钻、齿轮滚刀的三维数字模型；
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