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�������պ����ѧѧ�� 2004, Vol. 30 Issue (02) :122-126    DOI:
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�¹�˴1, ������1, ��ʿ��2*
1. �������պ����ѧ ��е���̼��Զ���ѧԺ, ���� 100083;
2. �й���ѧԺ���㼼���о���, ���� 100085
Object-oriented undirected graph model in P&ID design system
Hao Guoshun1, Liu Jinghua1, Li Shicai2*
1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100085, China

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Abstract�� When developing P&ID aided design system, the logical topology information between entities needed to be represented. In order to avoid the complexity of importing additional abstract entities, a new model is designed in which the logical topology information is united to the primary entity's data structure. This model has been successfully practised. The modeling process of P&ID undirected graph model from piping network graph was presented. After analyzing the characters of P&ID undirected graph, it points out what should be paid attention to when applying the model and how to extend the undirected graph.
Keywords�� factories   pipe networks   graphs   mathematical models   computer aided design   process &   instrument design     
Received 2002-09-24;
About author: �¹�˴(1978-),��,�ӱ��ˮ��,˶ʿ��, hgsbak@163.com.
�¹�˴, ������, ��ʿ��.���ڶ����P&ID����������ͼģ��[J]  �������պ����ѧѧ��, 2004,V30(02): 122-126
Hao Guoshun, Liu Jinghua, Li Shicai.Object-oriented undirected graph model in P&ID design system[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(02): 122-126
http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2004/V30/I02/122
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