Main features of the paper are as follow , 1 . the method of vd is studied in the theory and the vd ' s procedure is put forward 本论文的主要特点和意义： 1 、对虚拟设计方法的内容进行理论研究，并提出了进行虚拟设计的基本步骤。
In the process of vd i adopt parameter design and variable design to different workpieces to set 3 - demention model 在虚拟设计中，针对零部件加工工艺和应用的不同特点，分别采用参数化设计和变量化设计对检测系统零部件进行3d建模。
Globe , network and virtual are important characters of the manufacturing industries , so the achievement of virtual design ( vd ) is also a major content 全球化、网络化和虚拟化已成为制造业发展的重要特征，而实现“虚拟设计”是制造业虚拟化的重要内容。
Through it can reduce the shorter time of design and developing new productions with the method of vd method than with the method of traditional design 通过对样机的测试，与传统设计方法进行比较，一方面大大地缩短了设计和开发周期，另一方面提高了产品的设计质量。
4 wang ea ， rosen vd ， alessandro js ， et al . recombinant human bone morphogenetic protein induces bone formation . proc natl acad sci usa ， 1990 ， 87 : 2220 5戴毅敏，陈新梅，毛天球，等.基因重组人骨形态蛋白- 2和牛骨形态蛋白异位诱导成骨的比较.实用口腔医学杂志， 2002 ， 18 （ 4 ） : 326 - 328
Similar to hot carrier degradation , asymmetric on - current recovery was also observed and discussed . device degradation behaviors are compared in low vd - stress and in high vd - stress condition 在自加热退化中我们也发现了类似热载流子退化中的非对称性恢复现象,并对其退化特点和模型进行了讨论。
3 . vd is not omnipotent . it not only need the methodological guidance , but also depends on various kinds of specialistic theories and skills , and even depends on the designer ' s experience 3 、虚拟设计不是万能的，它既需要方法论的指导，也依赖于各种专业理论和专业技术，更离不开技术人员的经验和实践。
In this research monoclonal antibodies of vd - 8 strain were produced on the base of previous work of our laboratory , and other common fungal pathogens in cotton were with tested the antibodies 本研究在实验室前期工作的基础上制备了棉花黄萎病菌的单克隆抗体，同时应用所制备的抗体对棉花上其他常见的病原真菌进行了检测。
From its realization , the local short - delay interconnection method , the coding symbol synchronization method of multidimensional tcm , and the reliable receiving structure of high - speed dada are advanced 同时根据工程实践总结了vd基于网格图的短时延局部连线设计方法、接收端的多维tcm编码符号同步方法,设计了高速数据的可靠接收结构。
