8 . ) connects and integrates all libraries and databases based on correlative parametric design theory and using vb ' s powerful function and correlative technique . 9 . ) develops database system for fan parametric design 根据相关的参数化设计原理,利用vb语言的强大功能及其相关技术,把各库相连、集成,开发了风机参数化设计数据库系统。
Collect copies of customer statements , inventory lists , management reports , and any other documents that are part of the existing system , because these will be useful to you in designing the database and the interfaces 应收集客户结算单、库存清单、管理报表以及属于现有系统的其他任何文档的副本,因为这些信息对于设计数据库和界面非常有用。
With the help of the desiign principle of standardized database , it concludes the approach how to eliminate transfer dependence on the correlative tables , and discusses the way of how to use entity - relationship ( e - r ) model to design the database 论文还通过范式及规范理论,推导了如何消除关系表中的传递依赖,并讨论了使用实体联系( e - r )模型设计数据库的方法。
In order to realizing the system , models are built , database structure is designed , and programs are written , user management , item management , document management and product structure and configuration management are built 通过建立对象模型、设计数据库结构和编程实现系统等几个相应步骤,建立了用户管理、文档管理、项目管理和产品结构与配置管理这几个模块。
The typical scheme has two serious disadvantages , one of which is that the encryption system based on the scheme can run on a single comptuter , and the other is that it lacks of flexibility and rationality in key management 本文在设计数据库加密系统方案的过程中在保证数据库安全的前提下力图解决该典型方案的两个重大不足:一是适用范围较窄,另一个是密钥管理方案不合理。