自顶向下设计方法 meaning in English
todown approach
Examples
- The geometric model for computer - aided industrial design , which supports the method of top - down , is constructed . it can record the history of geometric modeling and provide the mechanism of controlling the granularity of geometric information
建立了支持自顶向下设计方法的计算机辅助工业设计几何模型，它能够记录儿何建模的历史并提供几何信息粒度可控的机制。 - It also does deep research on feature definition , feature classfication the relationship among features and the object - oriented technology , much emphasis was given on the combination of assembly model with feature and object - oriented technology
同时对特征的定义、分类和面向对象技术进行了研究，着重研究了特征和面向对象技术在自顶向下设计方法和装配模型中的应用，使特征技术、面向对象技术和装配模型有机地结合了起来。 - In chapter 5 , the means of structure design and part design are researched on . then the realization of structure design using top - down design is presented . with information of separated loops , the efficient part design has been achieved
第五章研究了系统结构设计与零件设计的实现方式，重点分析自顶向下设计方法在级进模结构设计中的应用；并根据工艺分析系统的特征环几何信息来设计凸凹模零件，实现工作区零件的快速设计。 - In the light of the method of top - down , the author put forward the concept of product function structure tree , which was used to express the product ' s function structure during the conceptual design . based on it , the product structure was expressedthe paper studies the definition of the function model which supports the method of top - down design , and the expression of function model based on binary - tree was also put forward in the thesis . for the abstract description of parts in the assembly level and the integration with other systems during the whole life circle of the products , the concept of assembly model was presented , the definiton , classfication and expresstion method of assembly feature was studied in this thesis . the representation of assembly relationship and data structure of the assembly model based on diagram was further studied . for the constraints transfer between function model and assembly model , an hierarchical component model is presented . an arithmetic of the change of assembly relationship when assembly model changing was also studied . fmally , a system named fb - tpms , which using object oriented programming technology and pro / toolkit , was developed
为了支持在装配层次上的零件的抽象建模，提出了骨架模型的概念，并讨论了装配模型的建立方法。根据前述装配模型有关研究，探讨了从功能模型到装配模型以及从上一级装配模型到下一级装配模型的数据和约束传递问题，并用层次化单元装配模型得以解决，同时提出了装配模型变动时引起的装配关系的变化的有关算法。在论文的最后部分用用面向对象的程序设计方法，结合课题要求，研究了支持自顶向下设计方法的装配建模系统fb - tpms 。