A good algorithm to design such a hierarchical database consists of two steps, first, to describe real world in E-R model and then, convert it to the model supported by the DBMS.
在设计层次型数据库时，一个较好的设计方法是分二步走：首先利用实体联系方法抽象出现实世界的实体联系模型，然后将实体联系模型变换到具体DBMS 所支持的层次型模型。
The logic framework structured design is consisted of theory analysis of function dependency, relation normalization, transformation from E-R model to relation model and data model normalization.
逻辑结构设计包括函数依赖和关系规范化的理论分析、E - R模型向关系模型的转换和数据模式规范化。
Used the E-R graph tool to design the system information model, and has constructed the system database physical information model.
采用实体联系图工具设计了系统的信息模型，并构建了系统的数据库物理信息模型。
According to the deficiency of traditional E-R model in large database designing, the paper puts forward a design idea of object-oriented database based on UML.
针对传统e - R模型在大型数据库设计中的不足，提出一种基于UML的面向对象数据库设计思想。
Some basic concepts of E-R relation model and multi-dimension data model are introduced, and design of multi-dimension data model of demand management is described in detail.
本文介绍了ER关系模型和多维数据模型的一些基本概念，着重介绍了需求管理的多维数据模型设计。
Meanwhile a concurrent R&D model of ceramics is presented under the environment of Computer Supported Cooperative Design for the improvement of design efficiency.
为提高陶瓷产品研发效率，文中提出了一种在计算机支持的协同设计环境下的陶瓷产品的并行研发模式。
In this paper, a tw(r state dynamic upper control model has been set up. Linear quadratic(LQ)algorithm and time-energy minimurn method are used to design the upper controller respectively.
在建立两辆汽车组成的动力学系统模型基础上，应用线性二次型最优理论及时间-能量最优理论研究了汽车辅助驾驶系统上位控制方法。
In this paper, a tw(r state dynamic upper control model has been set up. Linear quadratic(LQ)algorithm and time-energy minimurn method are used to design the upper controller respectively.
在建立两辆汽车组成的动力学系统模型基础上，应用线性二次型最优理论及时间-能量最优理论研究了汽车辅助驾驶系统上位控制方法。
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