This paper chiefly studies the application of VRML (virtual reality modeling language) in the virtual model base of engineering graphics.
主要研究VRML（虚拟现实建模语言）在工程图学虚拟模型库中的应用。
Thirdly, on the base of "virtual distance attenuation", the paper brings forward a forecasting model of the CS of tourism websites—virtual distance weighing.
第三部分，首先根据旅游网站使用者满意度的“虚拟距离衰减”规律，引深提出了旅游网站使用者满意度的预测模式——“虚拟距离衡量法”。
Based on logical knowledge express model, virtual workshop scheduling system knowledge base are established, and knowledge for scheduling are expressed in rule form.
由逻辑型的知识表示模式构造虚拟车问调度系统知识库，知识库内存放的知识以规则的形式表示。
Base on the practical data, the virtual structure, which has equivalent stiffness, is built by using inverse problem method. It can substitute the complex structure model in practice.
以实测数据为依据，采用反问题解法构造了与实际结构刚度相当的虚拟结构模型，代替了复杂的实际结构模型。
Additional research was carried out using the proposed model, including evaluation of wind credible capacity of Jiangsu wind power base and the study on the impact of virtual unit parameters.
利用所提出的方法计算了江苏省千万千瓦级风电基地的可信容量，并研究了虚拟机组的参数对风电可信容量的影响规律。
Combining with the applied request of Virtual Environment railway Location System, the technique of inquiring, reappearing and using of the railway structure 3d model base is researched.
结合虚拟环境选线系统中的应用要求，探讨了铁路构造物三维模型库的访问、再现和利用技术。
Combining with the applied request of Virtual Environment railway Location System, the technique of inquiring, reappearing and using of the railway structure 3d model base is researched.
结合虚拟环境选线系统中的应用要求，探讨了铁路构造物三维模型库的访问、再现和利用技术。
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