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題名 Finding k most favorite products based on reverse top-t queries
作者 Koh, J.-L.;Lin, C.-Y.;Chen, Arbee L.P.
陳良弼
貢獻者 資科系
關鍵詞 Computational complexity; Query processing; Approximate solution; Greedy algorithms; Maximum coverage; Memory utilization; Multiple components; Potential customers; Quality guaranteed; Reverse top-t query; Sales
日期 2014-08
上傳時間 16-Jun-2015 17:34:26 (UTC+8)
摘要 A reverse top-t query for a product returns a set of customers, named potential customers, who regard the product as one of their top-t favorites. Given a set of customers with different preferences on the features of the products, we want to select at most k products from a pool of candidate products such that their total number of potential customers is maximized. Two versions of the problem are defined according to whether the competitive existing products are given. For solving this NP-hard problem, we first propose an incremental greedy approach to find an approximate solution of the problem with quality guaranteed. For further speeding up this basic greedy approach, we exploit several properties of the top-t queries and skyline queries to reduce the solution space of the problem. In addition, an upper bound of the potential customers is estimated to reduce the cost of computing the reverse top-t queries for the candidate products. Finally, when the candidate products are formed from multiple component tables, we propose a strategy to reduce the number of the accessed tuples in the component tables such that only the tuples that are possibly components of the top-t favorites of the customers need to be accessed. By applying these pruning strategies, we propose another faster greedy approach. The experiment results demonstrate that the proposed pruning strategies work very well and make the faster greedy algorithms for both versions of the problem achieve excellent performance on both efficiency and memory utilization. © 2013 Springer-Verlag Berlin Heidelberg.
關聯 VLDB Journal, 23(4), 541-564
資料類型 article
DOI http://dx.doi.org/10.1007/s00778-013-0336-8
dc.contributor 資科系
dc.creator (作者) Koh, J.-L.;Lin, C.-Y.;Chen, Arbee L.P.
dc.creator (作者) 陳良弼zh_TW
dc.date (日期) 2014-08
dc.date.accessioned 16-Jun-2015 17:34:26 (UTC+8)-
dc.date.available 16-Jun-2015 17:34:26 (UTC+8)-
dc.date.issued (上傳時間) 16-Jun-2015 17:34:26 (UTC+8)-
dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/75863-
dc.description.abstract (摘要) A reverse top-t query for a product returns a set of customers, named potential customers, who regard the product as one of their top-t favorites. Given a set of customers with different preferences on the features of the products, we want to select at most k products from a pool of candidate products such that their total number of potential customers is maximized. Two versions of the problem are defined according to whether the competitive existing products are given. For solving this NP-hard problem, we first propose an incremental greedy approach to find an approximate solution of the problem with quality guaranteed. For further speeding up this basic greedy approach, we exploit several properties of the top-t queries and skyline queries to reduce the solution space of the problem. In addition, an upper bound of the potential customers is estimated to reduce the cost of computing the reverse top-t queries for the candidate products. Finally, when the candidate products are formed from multiple component tables, we propose a strategy to reduce the number of the accessed tuples in the component tables such that only the tuples that are possibly components of the top-t favorites of the customers need to be accessed. By applying these pruning strategies, we propose another faster greedy approach. The experiment results demonstrate that the proposed pruning strategies work very well and make the faster greedy algorithms for both versions of the problem achieve excellent performance on both efficiency and memory utilization. © 2013 Springer-Verlag Berlin Heidelberg.
dc.format.extent 2456386 bytes-
dc.format.mimetype application/pdf-
dc.relation (關聯) VLDB Journal, 23(4), 541-564
dc.subject (關鍵詞) Computational complexity; Query processing; Approximate solution; Greedy algorithms; Maximum coverage; Memory utilization; Multiple components; Potential customers; Quality guaranteed; Reverse top-t query; Sales
dc.title (題名) Finding k most favorite products based on reverse top-t queries
dc.type (資料類型) articleen
dc.identifier.doi (DOI) 10.1007/s00778-013-0336-8
dc.doi.uri (DOI) http://dx.doi.org/10.1007/s00778-013-0336-8