文章摘要信息 关键词 ： 复杂曲面；几何特征属性；可加工性；评价值 [gap=674]Keywords : complicated surface；geometrical feature attribute；machinability；evaluation
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几何知识是依据几何特征属性识别的土地管理领域知识之一。
Knowledge of geometry is one of land management domain knowledge that can be identified by the geometric characteristics of attribution.
提出了将虚拟装配中的产品属性与行为信息分为产品层、特征层、几何拓扑层以及显示层。
The product attribute and behavior information in virtual assembly is stored in a hierarchy of product, feature, geometry & topology and display levels.
现有的递进网格生成算法不仅效率低，而且大多只能完成几何特征的简化，没有考虑网格模型的其它表面属性。
Current algorithms for generating progressive meshes often have a low efficiency and can only complete the simplification of the geometric characters, without considering the other surface attributes.
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