检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]西安建筑科技大学理学院,陕西西安710055 [2]西北工业大学现代设计与集成制造技术教育部重点实验室,陕西西安710072
出 处:《计算机集成制造系统》2013年第8期1975-1983,共9页Computer Integrated Manufacturing Systems
基 金:国家自然科学基金资助项目(51075336);陕西省教育厅专项科研基金资助项目(12JK0695)~~
摘 要:为了对工程图的局部信息进行有效检索,在正投影理论和投影规则的基础上,以拓扑层次树为评价模型构建了工程图重用检索系统。通过引入投影的视图模型概念,以反映产品某一基本视图投影的形状和几何属性的投影域获取为基础,构建了反映投影域空间位置关系的拓扑关系邻接矩阵。通过建立冗余包含关联对及单一包含关联对,达到对空间包含关系的聚合。以所建立基本视图中的投影域的拓扑位置关系为基础,构建体现投影域空间位置关系的拓扑层次树。以拓扑层次树为评价模型,对树的层间和层内相似性进行评价,达到对拓扑层次树进行整体相似评价的目的。实验结果表明,该检索方法具有较好的查全率和查准率,能有效支撑工程图的相似性评价。To retrieve the local information of engineering drawing effectively, based on the orthographic projection theory and the projective rules, the reuse retrieval system for engineering drawings was constructed by taking the to- pology hierarchical tree as evaluating model. Through introducing the view model concept of projective drawing, the topological relation adjacency matrix representing the space position relationship of projective region was constructed based on the projective region acquirement of one basic view projection's shape and geometrical attribute. Through building the associative pairs of redundant relations and the associative pairs of single relations, the space inclusion relationship was aggregated. Based on topological position relationship among the projective regions in established basic view, the topological hierarchy tree of space position relationship was built. By taking the topological hierarchy tree as the evaluating model, the interlamination similarity and the intraformational similarity were evaluated, and the entire similarity of topology hierarchy tree was evaluated. Experimental results showed that the retrieval method had better recall and precision, and could effectively support and accomplish the similarity evaluation for engineering drawings.
关 键 词:工程图 视图模型 相似性评价 重用检索 计算机辅助设计模型
分 类 号:TP391[自动化与计算机技术—计算机应用技术]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.116