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。
In order to support the whole process of design activities, a hierarchical model to represent the functional and geometrical information of welded machine frame is presented.
通过建立一个基于层次数据结构的焊接机架表示模型，表示焊接机架的功能信息和几何信息，以支持焊接机架全过程的设计活动。
This paper provides a hierarchical semantic model for the design of complex products based on existing 3D CAD software.
针对复杂产品的设计建模提出了一个层次语义模型。
On this basis, we propose a hierarchical model of text classification, then this model is applied to the Chinese web page classification, and we design and implement a prototype system.
在此基础上，本文提出了一个层次式文本分类模型，然后将此模型应用到中文网页分类这一实际问题中，设计并实现了一个原型系统。
By setting up a hierarchical mechanism motion model for conceptual design through the formal description of function symbol we provide a solid support to the computer aided conceptual motion design.
通过功能符号形式化描述建立分层次的机构概念运动模型，实现对计算机辅助概念运动设计的支持。
The process model of product collaborative design is the basis of designing the modular and hierarchical collaboration-supported system.
协同设计过程模型为协同设计支持软件体系结构的模块化和层次化设计奠定了良好的基础。
The process model of product collaborative design is the basis of designing the modular and hierarchical collaboration-supported system.
协同设计过程模型为协同设计支持软件体系结构的模块化和层次化设计奠定了良好的基础。
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