变化的业务需求不断地要求向关系数据模型或面向对象模型中添加新实体和关系。
From time to time, the demands of changing business needs require that you add new entities and relationships to the relational data models or object-oriented models.
本文引入面向对象的时空数据模型，把各种实体作为对象，把道路作为面状要素描述。
The paper introduced object oriented spatiotemporal data model, looked on all kinds of things as objects and described road as face shape element.
面向对象的地理信息模型以地理空间实体为对象，地理实体可以从几何数据、符号数据、实体数据、属性数据的角度来进行数据的组织。
A geo-spatial entity which can be organized from geometric data, symbol data, entity data, attribute data is regarded as an object to the object oriented geographical information model.
作者结合三维实体单元模型，介绍如何对其进行面向对象的非线性有限元程序设计。
Based on the three-dimension solid element, how to design for Object-Oriented nonlinear FEM Program.
第四章介绍如何利用面向对象的方法建立船舶结构的三维实体模型，同时给出相关的数据结构；
The fourth chapter tells how to build 3D solid model for hull structure applying the oriented object technology, furthermore, the corresponding data structures are presented.
文中应用面向对象的设计方法 ，针对消除隐藏线算法 ，为由点、直线段、多边形构成的立体图形设计了一种实体模型 ，该实体模型具有封装性和可维护性等面向对象设计方法的优点。
In this paper, based on object-oriented design, we design an efficient solid model for 3-dimension object constructed by point, straight line and polygon to accomplish hidden-line detection method.
文中应用面向对象的设计方法 ，针对消除隐藏线算法 ，为由点、直线段、多边形构成的立体图形设计了一种实体模型 ，该实体模型具有封装性和可维护性等面向对象设计方法的优点。
In this paper, based on object-oriented design, we design an efficient solid model for 3-dimension object constructed by point, straight line and polygon to accomplish hidden-line detection method.
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