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零部件的特征信息管理
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作者 K.Spors H.Hennig +1 位作者 陈巍 郑水英 《工程设计学报》 CSCD 2001年第4期181-182,共2页
实时的计算机辅助工程需要数据管理 ,其中存储了直接可以评估的所有对象之间的所有关系 .通过 2个例子介绍了采用 PDM系统管理零部件特征信息的一些方法 。
关键词 计算机辅助工程 零部件 特征信息管理 产品开发 数据管理 PDM系统 汽车 产品设计
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基于UDF建模的特征信息管理方法研究
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作者 梁艳超 乔立红 樊景松 《成组技术与生产现代化》 2015年第3期1-4,11,共5页
依据MBD规范,应用UDF快速建模方法进行产品三维数字化模型的定义.研究面向制造的特征信息模型,对特征信息进行统一且结构化的管理,对零件模型的特征信息进行提取与组织,向下游工艺设计、制造仿真活动传递完整的特征信息,有效支持设计与... 依据MBD规范,应用UDF快速建模方法进行产品三维数字化模型的定义.研究面向制造的特征信息模型,对特征信息进行统一且结构化的管理,对零件模型的特征信息进行提取与组织,向下游工艺设计、制造仿真活动传递完整的特征信息,有效支持设计与制造信息的一体化应用. 展开更多
关键词 MBD 特征信息管理 UDF
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信号特征管理是新型军舰设计的重要组成部分
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作者 崔淑华 《国外舰船工程》 1998年第10期27-31,共5页
提出了工业部门对符号商定的水上和/或水下信号特征的新型军舰信号特征管理过程的看法。
关键词 信息特征管理 评估 军船设计 目标 建模
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Landform Planation Index Extracted from DEMs: A Case Study in Ordos Platform of China 被引量:3
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作者 QIAN Yeqing XIONG Liyang +1 位作者 LI Jilong TANG Guoan 《Chinese Geographical Science》 SCIE CSCD 2016年第3期314-324,共11页
Planation surface, a surface that is almost flat, is a kind of low-relief landforms. Planation surface is the consequence of the denudation and planation processes under a tectonic stable condition. The quantitative e... Planation surface, a surface that is almost flat, is a kind of low-relief landforms. Planation surface is the consequence of the denudation and planation processes under a tectonic stable condition. The quantitative expression of the characteristics of planation surface plays a key role in reconstructing and describing the evolutionary process of landforms. In this study, Landform Planation Index(LPI), a new terrain derivative, was proposed to quantify the characteristics of planation surface. The LPIs were calculated based on the summit surfaces formed according to the clustering results of peaks. Ten typical areas in the Ordos Platform located in the central part of the Loess Plateau of China are chosen as the test areas for investigating their planation characteristics with the LPI. The experimental results indicate that the LPI can be effectively used to quantify the characteristics of planation surfaces. In addition, the LPI can be further used to depict the patterns of spatial differentiation in the Ordos Platform. Although the present Ordos Platform area is full of the high-density gullies, its planation characteristics is found to be well preserved. Furthermore, the characteristics of the planation surfaces can also reflect the original morphology of the Ordos Platform before the loess dusts deposition process evolved in this area. The statistical results of the LPI show that there is a gradually increasing tendency along with the increasing of slope gradient of summit surface. It indicates that the characteristics of planation surfaces vary among test areas with different landforms. These findings help to deepen the understanding of planation characteristics of the loess landform and its underlying paleotopography. Results of this study can be also served as an important theoretical reference value for revealing the evolutionary process of loess landform. 展开更多
关键词 Landform Planation Index(LPI) peak summit surface Digital Elevation Model(DEM) Ordos Platform China
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