{"id":"https://openalex.org/W2072043398","doi":"https://doi.org/10.1109/grc.2009.5255130","title":"A Time-context-Based Collaborative Filtering Algorithm","display_name":"A Time-context-Based Collaborative Filtering Algorithm","publication_year":2009,"publication_date":"2009-08-01","ids":{"openalex":"https://openalex.org/W2072043398","doi":"https://doi.org/10.1109/grc.2009.5255130","mag":"2072043398"},"language":"en","primary_location":{"id":"doi:10.1109/grc.2009.5255130","is_oa":false,"landing_page_url":"https://doi.org/10.1109/grc.2009.5255130","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE International Conference on Granular Computing","raw_type":"proceedings-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5010540039","display_name":"Liang He","orcid":"https://orcid.org/0000-0002-4723-5486"},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":true,"raw_author_name":"Liang He","raw_affiliation_strings":["Department of Computer Science & Technology, East China Jiao Tong University, Shanghai, China","Dept. of Comput. Sci. & Technol., East China Normal Univ., Shanghai, China#TAB#"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science & Technology, East China Jiao Tong University, Shanghai, China","institution_ids":[]},{"raw_affiliation_string":"Dept. of Comput. Sci. & Technol., East China Normal Univ., Shanghai, China#TAB#","institution_ids":["https://openalex.org/I66867065"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5064804979","display_name":"Faqing Wu","orcid":null},"institutions":[{"id":"https://openalex.org/I66867065","display_name":"East China Normal University","ror":"https://ror.org/02n96ep67","country_code":"CN","type":"education","lineage":["https://openalex.org/I66867065"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Faqing Wu","raw_affiliation_strings":["Department of Computer Science & Technology, East China Jiao Tong University, Shanghai, China","Dept. of Comput. Sci. & Technol., East China Normal Univ., Shanghai, China#TAB#"],"affiliations":[{"raw_affiliation_string":"Department of Computer Science & Technology, East China Jiao Tong University, Shanghai, China","institution_ids":[]},{"raw_affiliation_string":"Dept. of Comput. Sci. & Technol., East China Normal Univ., Shanghai, China#TAB#","institution_ids":["https://openalex.org/I66867065"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5010540039"],"corresponding_institution_ids":["https://openalex.org/I66867065"],"apc_list":null,"apc_paid":null,"fwci":2.9612,"has_fulltext":false,"cited_by_count":23,"citation_normalized_percentile":{"value":0.92864437,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":null,"issue":null,"first_page":"209","last_page":"213"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9998999834060669,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11165","display_name":"Image and Video Quality Assessment","score":0.978600025177002,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10824","display_name":"Image Retrieval and Classification Techniques","score":0.9750000238418579,"subfield":{"id":"https://openalex.org/subfields/1707","display_name":"Computer Vision and Pattern Recognition"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/collaborative-filtering","display_name":"Collaborative filtering","score":0.965894877910614},{"id":"https://openalex.org/keywords/movielens","display_name":"MovieLens","score":0.9453180432319641},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8321230411529541},{"id":"https://openalex.org/keywords/recommender-system","display_name":"Recommender system","score":0.8043922781944275},{"id":"https://openalex.org/keywords/context","display_name":"Context (archaeology)","score":0.6731160879135132},{"id":"https://openalex.org/keywords/precision-and-recall","display_name":"Precision and recall","score":0.46711668372154236},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.438385546207428},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.42778024077415466},{"id":"https://openalex.org/keywords/preference","display_name":"Preference","score":0.41183096170425415},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.406139075756073},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.39358213543891907},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.37107810378074646},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.0929306149482727}],"concepts":[{"id":"https://openalex.org/C21569690","wikidata":"https://www.wikidata.org/wiki/Q94702","display_name":"Collaborative filtering","level":3,"score":0.965894877910614},{"id":"https://openalex.org/C2776156558","wikidata":"https://www.wikidata.org/wiki/Q4353746","display_name":"MovieLens","level":4,"score":0.9453180432319641},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8321230411529541},{"id":"https://openalex.org/C557471498","wikidata":"https://www.wikidata.org/wiki/Q554950","display_name":"Recommender system","level":2,"score":0.8043922781944275},{"id":"https://openalex.org/C2779343474","wikidata":"https://www.wikidata.org/wiki/Q3109175","display_name":"Context (archaeology)","level":2,"score":0.6731160879135132},{"id":"https://openalex.org/C81669768","wikidata":"https://www.wikidata.org/wiki/Q2359161","display_name":"Precision and recall","level":2,"score":0.46711668372154236},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.438385546207428},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.42778024077415466},{"id":"https://openalex.org/C2781249084","wikidata":"https://www.wikidata.org/wiki/Q908656","display_name":"Preference","level":2,"score":0.41183096170425415},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.406139075756073},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.39358213543891907},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.37107810378074646},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0929306149482727},{"id":"https://openalex.org/C151730666","wikidata":"https://www.wikidata.org/wiki/Q7205","display_name":"Paleontology","level":1,"score":0.0},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.0},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/grc.2009.5255130","is_oa":false,"landing_page_url":"https://doi.org/10.1109/grc.2009.5255130","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2009 IEEE International Conference on Granular Computing","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":12,"referenced_works":["https://openalex.org/W281665770","https://openalex.org/W1971040550","https://openalex.org/W2043403353","https://openalex.org/W2057902046","https://openalex.org/W2057991616","https://openalex.org/W2096762662","https://openalex.org/W2108153239","https://openalex.org/W2113273124","https://openalex.org/W2117311203","https://openalex.org/W2117354486","https://openalex.org/W2171960770","https://openalex.org/W6676967314"],"related_works":["https://openalex.org/W2355698112","https://openalex.org/W2022984797","https://openalex.org/W4394818607","https://openalex.org/W2986679525","https://openalex.org/W2797500822","https://openalex.org/W2794458286","https://openalex.org/W4205822456","https://openalex.org/W4299358966","https://openalex.org/W2537367858","https://openalex.org/W2942098650"],"abstract_inverted_index":{"Collaborative":[0],"filtering,":[1],"one":[2,63],"of":[3,55,64],"the":[4,53,61,65,70,85,115],"most":[5,66],"widely":[6],"used":[7],"algorithm":[8,74,82],"in":[9],"recommender":[10],"system,":[11],"predicts":[12],"a":[13,77],"user's":[14],"preference":[15],"towards":[16],"an":[17],"item":[18],"by":[19,23,108],"aggregating":[20],"ratings":[21],"given":[22],"users":[24],"having":[25],"similar":[26],"taste":[27],"with":[28,42,126],"that":[29],"user.":[30],"State-of-the-art":[31],"approaches":[32,50],"introduce":[33],"many":[34],"other":[35],"secondary":[36],"methods":[37],"to":[38,40,83],"combine":[39],"cope":[41],"sparsity":[43],"and":[44,75,122],"precision":[45],"problem.":[46],"However,":[47],"these":[48],"hybrid":[49],"rarely":[51],"consider":[52],"importance":[54],"context":[56],"information.":[57],"This":[58],"paper":[59],"incorporates":[60],"time-context,":[62],"important":[67],"contexts,":[68],"into":[69],"traditional":[71,88],"collaborative":[72,79,89],"filtering":[73,80,90],"proposes":[76],"time-context-based":[78],"(TBCF)":[81],"improve":[84,119],"performance":[86],"for":[87],"algorithm.":[91],"Experiments":[92],"evaluating":[93],"our":[94],"approach":[95,117],"are":[96],"carried":[97],"out":[98],"on":[99],"real":[100],"dataset":[101],"taken":[102],"from":[103],"movie":[104],"recommendation":[105],"system":[106],"provided":[107],"MovieLens":[109],"Web":[110],"site.":[111],"The":[112],"result":[113],"shows":[114],"proposed":[116],"can":[118],"predication":[120],"accuracy":[121],"recall":[123],"ratio":[124],"compared":[125],"existing":[127],"methods.":[128]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":2},{"year":2015,"cited_by_count":3},{"year":2014,"cited_by_count":4},{"year":2013,"cited_by_count":1},{"year":2012,"cited_by_count":2}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}