Secondly , in respect bayes method is difficult in extracting features and in establishing statistical models , and the capability of no - linear approach is preferably for bp neural netw ork , the method ( bpbayes method ) to combine neural network with subjective bayesian was introduced . in this method , bp neural network was used to replace the experts of relevant domains for applying subjective bayes method 其次，考虑到bayes方法在特征建模上具有较大的难度，而bp神经网络具有较强的非线性逼近能力，为此我们将bp神经网络的输出代替领域专家的知识经验，并用bp神经网络与主观bayes方法结合起来的bpbayes方法对目标进行识别。
Thus , the nation science foundation project - " research of the modeling method for distributed interactive three - dimension visual behavior - characteristic " , in 2000 - carries out researches in3d modeling technology , 3d collision testing , human motion simulation , distributed network communication model , 3d routing algorithm and database engine technology , striving for developing a simulation pl atform for general applications 因此， 2000年国家自然科学基金项目“分布交互三维视景行为?特征建模方法研究”展开了对3d建模技术、 3d碰撞检测、人体运动仿真、分布式网络通讯模型、 3d寻径算法和数据库引擎技术等研究开发，力图开发出一个应用面较广的仿真平台。
After this work , the author lucubrate the character of building feature element with pro / e and the principle of building feature element with pro / toolkit which is a quadratic tool of pro / e . with the help of these work , the author analyse the improved means of building feature element with pro / toolkit by using the module of family table 探讨了结合pro e中familytable模块运用pro toolkit对pro e特征建模的机理加以改进的方法，同时实现了pro e与mfc的接口，从而延伸和扩展了pro e软件的参数化功能。
In the course of research of the project , some key technologies related with the developing of the three - dimensional standardized part library , such as parametric technology , characteristic modeling technology , data base technology and standardized problem of standard part library , were discussed in detail at first 在课题的研究过程中，首先详细讨论了与三维标准件库开发相关的几项关键技术：参数化技术、特征建模技术、数据库技术以及标准件库的标准化问题。
Geometry modeling technique ( including wire frame modeling , superficial modeling and solid modeling ) can not be adapted to the contemporary requirement in the development of cad / cam integration , then it comes into being the feature modeling means which can integrate entire product design and manufacture processes 几何建模技术(包括线框建模、表面建模和实体建模)已经不能够适应现代cad集成发展的需要,于是产生了面向整个产品设计过程和制造过程的建模方法? ?特征建模。
