Journal of University of Science and Technology of China ›› 2019, Vol. 49 ›› Issue (2): 93-99.DOI: 10.3969/j.issn.0253-2778.2019.02.002
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LUAN Yanhong
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Abstract: CP-net is a simple and intuitive graphical preference representation tool that can be used to describe the qualitative preference relationships implied in relatively tight, intuitive, structured conditional preference information. Full-featured qualitative decision-making with multiple dependencies between attributes in complete cases. Top-k queries are designed to retrieve the top k results that meet user requirements, thereby improving search efficiency. Aiming at implement Top-k queries with relational databases that have CP-net preferences. First, CP-net is induced into multiple tables for representation and storage, Then, the traditional Pareto composition is extended into the model so as to maintain a strict partial order relationship between preferences. Finally, based on “Lattice” theory, the Top-k query of relational database based on CP-net preference has been implemented.
Key words: CP-net, CPT, relational database, preference queries, preference composition
LUAN Yanhong, SUN Xuejiao. Top-k query of relational database based on CP-net[J]. Journal of University of Science and Technology of China, 2019, 49(2): 93-99.
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URL: http://just-cn.ustc.edu.cn/EN/10.3969/j.issn.0253-2778.2019.02.002
http://just-cn.ustc.edu.cn/EN/Y2019/V49/I2/93