| 摘要: |
| 机械工程图尺寸标注的识别与理解是最终识别和理解机械工程图的基础．本文以国标ＧＢ４４５８—８４为基础，将尺寸标注分为２７种模式和４８种子模式，并给出了其数学描述．本文详细描述了尺寸标注的基于箭头匹配模式的网状文法． |
| 关键词: 尺寸标注，识别，理解，模式，网状文法 |
| DOI： |
| 分类号: |
| 基金项目:国家教委博士点基金 |
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| WEB GRAMMAR OF DIMENSIONS IN ENGINEERING DRAWINGS |
|
Min Weidong;,Tang Zesheng,Tang Long
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| Abstract: |
| Recognizing and understanding dimensions in mechanical engineering drawings are the basis of recognizing and understanding these drawings. According to the national standard GB4458- 84 of China, dimensions are classified into 27 patterns and 48subpatterns whose mathematical descriptions are given. A web grammar based on arrowhead-match patterns is presented to describe dimensions. |
| Key words: Dimension recognition understanding pattern web-grammar. |
