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《Journal of Zhejiang University(Engineering Science)》 2009-09
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Digital underground spatial indexing QR-tree based on XML

TAN Wen-ken1,WANG Chang-hong2,3,SHI Yi-shao1(1.Department of Survey and Geo-Informatics,Tongji University,Shanghai 200092,China; 2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;3.Technological Center of Shanghai Construction Group,Shanghai 200083,China)  
Quadrate-rectangle(QR) tree was designed based on extensible markup language(XML) in order to improve data query and storage efficiency of digital underground space database.QR-tree based on XML limited the queried targets into special space.QR-tree based on XML reduced the transition difficult between traditional QR tree indexing document and data structure and increased the capacity that traditional QR-tree fell down quickly followed magnanimous data increment by using XML's structural character.QR-tree based on XML used the extensible feature of XML,conducted regular and structural depiction of indexing information,put indexing document and data structure into explicit storage format,and achieved dynamic-steady operation of QR-tree for solving such problems as high node storing time and overflow or underflow of traditional QR-tree.
【CateGory Index】: TP311.13
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【Citations】
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