{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T15:37:48Z","timestamp":1773243468202,"version":"3.50.1"},"publisher-location":"New York, NY, USA","reference-count":35,"publisher":"ACM","license":[{"start":{"date-parts":[[2012,4,16]],"date-time":"2012-04-16T00:00:00Z","timestamp":1334534400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2012,4,16]]},"DOI":"10.1145\/2187836.2187840","type":"proceedings-article","created":{"date-parts":[[2012,4,24]],"date-time":"2012-04-24T18:41:27Z","timestamp":1335292887000},"page":"21-30","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":135,"title":["An exploration of improving collaborative recommender systems via user-item subgroups"],"prefix":"10.1145","author":[{"given":"Bin","family":"Xu","sequence":"first","affiliation":[{"name":"Zhejiang Provincial Key Laboratory of Service Robot, College of Computer Science Zhejiang University, Hangzhou, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiajun","family":"Bu","sequence":"additional","affiliation":[{"name":"Zhejiang Provincial Key Laboratory of Service Robot, College of Computer Science Zhejiang University, Hangzhou, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chun","family":"Chen","sequence":"additional","affiliation":[{"name":"Zhejiang Provincial Key Laboratory of Service Robot, College of Computer Science Zhejiang University, Hangzhou, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Deng","family":"Cai","sequence":"additional","affiliation":[{"name":"State Key Lab of CAD&CG College of Computer Science Zhejiang University, Hangzhou, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2012,4,16]]},"reference":[{"key":"e_1_3_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1109\/TKDE.2005.99"},{"key":"e_1_3_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/245108.245124"},{"key":"e_1_3_2_1_3_1","first-page":"43","volume-title":"Proceedings of the 14th conference on Uncertainty in Artificial Intelligence","author":"Breese J.","year":"1998","unstructured":"J. Breese , D. Heckerman , C. Kadie , Empirical analysis of predictive algorithms for collaborative filtering . In Proceedings of the 14th conference on Uncertainty in Artificial Intelligence , pages 43 -- 52 , 1998 . J. Breese, D. Heckerman, C. Kadie, et al. Empirical analysis of predictive algorithms for collaborative filtering. In Proceedings of the 14th conference on Uncertainty in Artificial Intelligence, pages 43--52, 1998."},{"key":"e_1_3_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1109\/TPAMI.2010.231"},{"key":"e_1_3_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1145\/1553374.1553388"},{"key":"e_1_3_2_1_6_1","first-page":"93","volume-title":"Proceedings of International Conference on Intelligent Systems for Molecular Biology","volume":"8","author":"Cheng Y.","year":"2000","unstructured":"Y. Cheng and G. Church . Biclustering of expression data . In Proceedings of International Conference on Intelligent Systems for Molecular Biology , volume 8 , page 93 , 2000 . Y. Cheng and G. Church. Biclustering of expression data. In Proceedings of International Conference on Intelligent Systems for Molecular Biology, volume 8, page 93, 2000."},{"key":"e_1_3_2_1_7_1","doi-asserted-by":"publisher","DOI":"10.1145\/963770.963776"},{"key":"e_1_3_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/502512.502550"},{"key":"e_1_3_2_1_9_1","doi-asserted-by":"publisher","DOI":"10.1109\/ICDM.2005.14"},{"key":"e_1_3_2_1_10_1","volume-title":"Advances in Neural Information Processing Systems 16.","author":"He X.","year":"2003","unstructured":"X. He and P. Niyogi . Locality preserving projections . In Advances in Neural Information Processing Systems 16. 2003 . X. He and P. Niyogi. Locality preserving projections. In Advances in Neural Information Processing Systems 16. 2003."},{"key":"e_1_3_2_1_11_1","doi-asserted-by":"publisher","DOI":"10.1162\/153244301753344614"},{"key":"e_1_3_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.1145\/963770.963774"},{"key":"e_1_3_2_1_13_1","first-page":"688","volume-title":"International Joint Conference on Artificial Intelligence","volume":"16","author":"Hofmann T.","year":"1999","unstructured":"T. Hofmann and J. Puzicha . Latent class models for collaborative filtering . In International Joint Conference on Artificial Intelligence , volume 16 , pages 688 -- 693 , 1999 . T. Hofmann and J. Puzicha. Latent class models for collaborative filtering. In International Joint Conference on Artificial Intelligence, volume 16, pages 688--693, 1999."},{"key":"e_1_3_2_1_14_1","doi-asserted-by":"publisher","DOI":"10.1109\/MIS.2007.80"},{"key":"e_1_3_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.1145\/1571941.1571977"},{"key":"e_1_3_2_1_16_1","volume-title":"Algorithms for non-negative matrix factorization. Advances in neural information processing systems, 13","author":"Lee D.","year":"2001","unstructured":"D. Lee and H. Seung . Algorithms for non-negative matrix factorization. Advances in neural information processing systems, 13 , 2001 . D. Lee and H. Seung. Algorithms for non-negative matrix factorization. Advances in neural information processing systems, 13, 2001."},{"key":"e_1_3_2_1_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0165-0114(02)00372-X"},{"key":"e_1_3_2_1_18_1","doi-asserted-by":"publisher","DOI":"10.1145\/1935826.1935877"},{"key":"e_1_3_2_1_19_1","doi-asserted-by":"publisher","DOI":"10.1109\/TCBB.2004.2"},{"key":"e_1_3_2_1_20_1","doi-asserted-by":"publisher","DOI":"10.5555\/1394399"},{"key":"e_1_3_2_1_21_1","first-page":"187","volume-title":"Proceedings of the National Conference on Artificial Intelligence","author":"Melville P.","year":"2002","unstructured":"P. Melville , R. Mooney , and R. Nagarajan . Content-boosted collaborative filtering for improved recommendations . In Proceedings of the National Conference on Artificial Intelligence , pages 187 -- 192 , 2002 . P. Melville, R. Mooney, and R. Nagarajan. Content-boosted collaborative filtering for improved recommendations. In Proceedings of the National Conference on Artificial Intelligence, pages 187--192, 2002."},{"key":"e_1_3_2_1_22_1","first-page":"849","volume-title":"Advances in Neural Information Processing Systems 14","author":"Ng A.","year":"2001","unstructured":"A. Ng , M. Jordan , and Y. Weiss . On spectral clustering: Analysis and an algorithm . In Advances in Neural Information Processing Systems 14 , pages 849 -- 856 , 2001 . A. Ng, M. Jordan, and Y. Weiss. On spectral clustering: Analysis and an algorithm. In Advances in Neural Information Processing Systems 14, pages 849--856, 2001."},{"key":"e_1_3_2_1_23_1","volume-title":"Proceedings of the ACM SIGIR Workshop on Recommender Systems","author":"O'Connor M.","year":"1999","unstructured":"M. O'Connor and J. Herlocker . Clustering items for collaborative filtering . In Proceedings of the ACM SIGIR Workshop on Recommender Systems , 1999 . M. O'Connor and J. Herlocker. Clustering items for collaborative filtering. In Proceedings of the ACM SIGIR Workshop on Recommender Systems, 1999."},{"key":"e_1_3_2_1_24_1","first-page":"473","volume-title":"Proceedings of the 16th conference on uncertainty in artificial intelligence","author":"Pennock D.","year":"2000","unstructured":"D. Pennock , E. Horvitz , S. Lawrence , and C. Giles . Collaborative filtering by personality diagnosis: A hybrid memory-and model-based approach . In Proceedings of the 16th conference on uncertainty in artificial intelligence , pages 473 -- 480 , 2000 . D.Pennock, E.Horvitz, S.Lawrence, and C.Giles. Collaborative filtering by personality diagnosis: A hybrid memory-and model-based approach. In Proceedings of the 16th conference on uncertainty in artificial intelligence, pages 473--480, 2000."},{"key":"e_1_3_2_1_25_1","doi-asserted-by":"publisher","DOI":"10.1145\/1102351.1102441"},{"key":"e_1_3_2_1_26_1","doi-asserted-by":"publisher","DOI":"10.1145\/192844.192905"},{"key":"e_1_3_2_1_27_1","doi-asserted-by":"publisher","DOI":"10.1145\/371920.372071"},{"key":"e_1_3_2_1_28_1","doi-asserted-by":"publisher","DOI":"10.21236\/ADA439541"},{"key":"e_1_3_2_1_29_1","first-page":"158","volume-title":"Proceedings of the Fifth International Conference on Computer and Information Technology","author":"Sarwar B.","year":"2002","unstructured":"B. Sarwar , G. Karypis , J. Konstan , and J. Riedl . Recommender systems for large-scale e-commerce: Scalable neighborhood formation using clustering . In Proceedings of the Fifth International Conference on Computer and Information Technology , pages 158 -- 167 , 2002 . B. Sarwar, G. Karypis, J. Konstan, and J. Riedl. Recommender systems for large-scale e-commerce: Scalable neighborhood formation using clustering. In Proceedings of the Fifth International Conference on Computer and Information Technology, pages 158--167, 2002."},{"key":"e_1_3_2_1_30_1","doi-asserted-by":"publisher","DOI":"10.1155\/2009\/421425"},{"key":"e_1_3_2_1_31_1","first-page":"112","volume-title":"AAAI Workshop on Recommendation Systems","author":"Ungar L.","year":"1998","unstructured":"L. Ungar and D. Foster . Clustering methods for collaborative filtering . In AAAI Workshop on Recommendation Systems , pages 112 -- 125 , 1998 . L. Ungar and D. Foster. Clustering methods for collaborative filtering. In AAAI Workshop on Recommendation Systems, pages 112--125, 1998."},{"key":"e_1_3_2_1_32_1","doi-asserted-by":"publisher","DOI":"10.1007\/s10115-003-0123-8"},{"key":"e_1_3_2_1_33_1","doi-asserted-by":"publisher","DOI":"10.1145\/1571941.1571979"},{"key":"e_1_3_2_1_34_1","doi-asserted-by":"publisher","DOI":"10.1109\/TKDE.2011.71"},{"key":"e_1_3_2_1_35_1","first-page":"595","volume-title":"Advances in Neural Information Processing Systems","author":"Zhou D.","year":"2004","unstructured":"D. Zhou , O. Bousquet , T. Lal , J. Weston , and B. Scholkopf . Learning with local and global consistency . In Advances in Neural Information Processing Systems , pages 595 -- 602 , 2004 . D. Zhou, O. Bousquet, T. Lal, J. Weston, and B. Scholkopf. Learning with local and global consistency. In Advances in Neural Information Processing Systems, pages 595--602, 2004."}],"event":{"name":"WWW 2012: 21st World Wide Web Conference 2012","location":"Lyon France","acronym":"WWW 2012","sponsor":["Univ. de Lyon Universite de Lyon","SIGWEB ACM Special Interest Group on Hypertext, Hypermedia, and Web"]},"container-title":["Proceedings of the 21st international conference on World Wide Web"],"original-title":[],"link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/2187836.2187840","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/2187836.2187840","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T10:06:33Z","timestamp":1750241193000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/2187836.2187840"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,4,16]]},"references-count":35,"alternative-id":["10.1145\/2187836.2187840","10.1145\/2187836"],"URL":"https:\/\/doi.org\/10.1145\/2187836.2187840","relation":{},"subject":[],"published":{"date-parts":[[2012,4,16]]},"assertion":[{"value":"2012-04-16","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}