{"id":"https://openalex.org/W1996716483","doi":"https://doi.org/10.1145/2813448.2813513","title":"Solving RecSys Challenge 2015 by Linear Models, Gradient Boosted Trees and Metric Optimization","display_name":"Solving RecSys Challenge 2015 by Linear Models, Gradient Boosted Trees and Metric Optimization","publication_year":2015,"publication_date":"2015-09-15","ids":{"openalex":"https://openalex.org/W1996716483","doi":"https://doi.org/10.1145/2813448.2813513","mag":"1996716483"},"language":"en","primary_location":{"id":"doi:10.1145/2813448.2813513","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2813448.2813513","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 2015 International ACM Recommender Systems Challenge","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/A5039678992","display_name":"R\u00f3bert P\u00e1lovics","orcid":"https://orcid.org/0000-0003-0202-7760"},"institutions":[{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]},{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":true,"raw_author_name":"R\u00f3bert P\u00e1lovics","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and Technical University Budapest"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and Technical University Budapest","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5025559073","display_name":"P\u00e9ter Szalai","orcid":null},"institutions":[{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]},{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"P\u00e9ter Szalai","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and Technical University Budapest"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and Technical University Budapest","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5102890948","display_name":"Levente Kocsis","orcid":"https://orcid.org/0000-0002-8700-5060"},"institutions":[{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]},{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"Levente Kocsis","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5031774538","display_name":"Adrienn Szab\u00f3","orcid":"https://orcid.org/0000-0001-9498-9304"},"institutions":[{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]},{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"Adrienn Szab\u00f3","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5036940095","display_name":"Erzs\u00e9bet Frig\u00f3","orcid":null},"institutions":[{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]},{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"Erzs\u00e9bet Frig\u00f3","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5066878323","display_name":"J\u00falia Pap","orcid":null},"institutions":[{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]},{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"J\u00falia Pap","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI)","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5051219750","display_name":"Zs\u00f3fia K. Nyikes","orcid":null},"institutions":[{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]},{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"Zs\u00f3fia K. Nyikes","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and Technical University Budapest"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and Technical University Budapest","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5021452458","display_name":"Andr\u00e1s A. Bencz\u00far","orcid":"https://orcid.org/0000-0002-9392-0986"},"institutions":[{"id":"https://openalex.org/I4210117195","display_name":"Institute for Computer Science and Control","ror":"https://ror.org/0249v7n71","country_code":"HU","type":"facility","lineage":["https://openalex.org/I4210117195","https://openalex.org/I7597260"]},{"id":"https://openalex.org/I7597260","display_name":"Hungarian Academy of Sciences","ror":"https://ror.org/02ks8qq67","country_code":"HU","type":"funder","lineage":["https://openalex.org/I7597260"]},{"id":"https://openalex.org/I106118109","display_name":"E\u00f6tv\u00f6s Lor\u00e1nd University","ror":"https://ror.org/01jsq2704","country_code":"HU","type":"education","lineage":["https://openalex.org/I106118109"]}],"countries":["HU"],"is_corresponding":false,"raw_author_name":"Andr\u00e1s A. Bencz\u00far","raw_affiliation_strings":["Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and E\u00f6tv\u00f6s University Budapest"],"affiliations":[{"raw_affiliation_string":"Institute for Computer Science and Control, Hungarian Academy of Sciences (MTA SZTAKI) and E\u00f6tv\u00f6s University Budapest","institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260","https://openalex.org/I106118109"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":8,"corresponding_author_ids":["https://openalex.org/A5039678992"],"corresponding_institution_ids":["https://openalex.org/I4210117195","https://openalex.org/I7597260"],"apc_list":null,"apc_paid":null,"fwci":0.822,"has_fulltext":false,"cited_by_count":4,"citation_normalized_percentile":{"value":0.81325252,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":null,"first_page":"1","last_page":"4"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9945999979972839,"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":0.9945999979972839,"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/T12535","display_name":"Machine Learning and Data Classification","score":0.9890999794006348,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"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/T11704","display_name":"Mobile Crowdsensing and Crowdsourcing","score":0.9861999750137329,"subfield":{"id":"https://openalex.org/subfields/1706","display_name":"Computer Science Applications"},"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/metric","display_name":"Metric (unit)","score":0.797914445400238},{"id":"https://openalex.org/keywords/session","display_name":"Session (web analytics)","score":0.7849193811416626},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6440821290016174},{"id":"https://openalex.org/keywords/task","display_name":"Task (project management)","score":0.5722851157188416},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.5580130219459534},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5455847978591919},{"id":"https://openalex.org/keywords/recommender-system","display_name":"Recommender system","score":0.41348016262054443},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.13548272848129272}],"concepts":[{"id":"https://openalex.org/C176217482","wikidata":"https://www.wikidata.org/wiki/Q860554","display_name":"Metric (unit)","level":2,"score":0.797914445400238},{"id":"https://openalex.org/C2779182362","wikidata":"https://www.wikidata.org/wiki/Q17126187","display_name":"Session (web analytics)","level":2,"score":0.7849193811416626},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6440821290016174},{"id":"https://openalex.org/C2780451532","wikidata":"https://www.wikidata.org/wiki/Q759676","display_name":"Task (project management)","level":2,"score":0.5722851157188416},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.5580130219459534},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5455847978591919},{"id":"https://openalex.org/C557471498","wikidata":"https://www.wikidata.org/wiki/Q554950","display_name":"Recommender system","level":2,"score":0.41348016262054443},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.13548272848129272},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C187736073","wikidata":"https://www.wikidata.org/wiki/Q2920921","display_name":"Management","level":1,"score":0.0},{"id":"https://openalex.org/C21547014","wikidata":"https://www.wikidata.org/wiki/Q1423657","display_name":"Operations management","level":1,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1145/2813448.2813513","is_oa":false,"landing_page_url":"https://doi.org/10.1145/2813448.2813513","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 2015 International ACM Recommender Systems Challenge","raw_type":"proceedings-article"},{"id":"pmh:oai:eprints.sztaki.hu:8550","is_oa":false,"landing_page_url":"http://eprints.sztaki.hu/8550/","pdf_url":null,"source":{"id":"https://openalex.org/S4306401907","display_name":"SZTAKI Publication Repository (Hungarian Academy of Sciences)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I7597260","host_organization_name":"Hungarian Academy of Sciences","host_organization_lineage":["https://openalex.org/I7597260"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Book Section"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":5,"referenced_works":["https://openalex.org/W197326900","https://openalex.org/W2017121215","https://openalex.org/W2020790225","https://openalex.org/W2121990325","https://openalex.org/W2917030987"],"related_works":["https://openalex.org/W4307100037","https://openalex.org/W2968745142","https://openalex.org/W2809363009","https://openalex.org/W2348159088","https://openalex.org/W2045871438","https://openalex.org/W2350747448","https://openalex.org/W2368095327","https://openalex.org/W3087157779","https://openalex.org/W4306770904","https://openalex.org/W2122731942"],"abstract_inverted_index":{"The":[0],"RecSys":[1],"Challenge":[2],"2015":[3],"task":[4],"requested":[5],"prediction":[6],"for":[7,45,55],"items":[8],"purchased":[9],"in":[10],"online":[11],"web":[12],"shop":[13],"sessions.":[14],"We":[15],"describe":[16],"our":[17,51],"method":[18,52],"that":[19],"reached":[20],"fifth":[21],"place":[22],"on":[23],"the":[24,56],"leaderboard":[25],"by":[26],"constructing":[27],"a":[28],"large":[29],"number":[30],"of":[31,50],"item,":[32],"session,":[33],"and":[34,37,41],"session-item":[35],"features":[36],"using":[38],"linear":[39],"models":[40],"gradient":[42],"boosted":[43],"trees":[44],"learning.":[46],"An":[47],"important":[48],"element":[49],"included":[53],"optimization":[54],"specific":[57],"evaluation":[58],"metric.":[59]},"counts_by_year":[{"year":2023,"cited_by_count":2},{"year":2020,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2026-04-04T16:13:02.066488","created_date":"2025-10-10T00:00:00"}