基于麻花钻的制造过程，阐述了钻尖建模原理，并对钻尖的数学模型进行了分析。
Based on the production process, the drill model principle is represented and the mathematical model of drill is analyzed.
该文针对火炮炮尾炮闩机构提出了对其进行装配体有限元分析的方法和建模原理。
The principle and methodology of assembly level finite element modeling and analysis of gun breech mechanism were put forward in this paper.
本文主要讨论了图像特征的抽取、存储、转换和建模原理与实现方法，进而构建可视化模型。
This paper discussed how to extract, store, and transform image features, and then to build a visualized model.
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