{"id":"https://openalex.org/W3199908789","doi":"https://doi.org/10.1145/3460231.3478862","title":"Eigenvalue Perturbation for Item-based Recommender Systems","display_name":"Eigenvalue Perturbation for Item-based Recommender Systems","publication_year":2021,"publication_date":"2021-09-13","ids":{"openalex":"https://openalex.org/W3199908789","doi":"https://doi.org/10.1145/3460231.3478862","mag":"3199908789"},"language":"en","primary_location":{"id":"doi:10.1145/3460231.3478862","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3460231.3478862","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Fifteenth ACM Conference on Recommender Systems","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/A5007661427","display_name":"Cesare Bernardis","orcid":"https://orcid.org/0000-0002-8972-0850"},"institutions":[{"id":"https://openalex.org/I93860229","display_name":"Politecnico di Milano","ror":"https://ror.org/01nffqt88","country_code":"IT","type":"education","lineage":["https://openalex.org/I93860229"]}],"countries":["IT"],"is_corresponding":true,"raw_author_name":"Cesare Bernardis","raw_affiliation_strings":["Politecnico di Milano, Italy"],"affiliations":[{"raw_affiliation_string":"Politecnico di Milano, Italy","institution_ids":["https://openalex.org/I93860229"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5062726854","display_name":"Paolo Cremonesi","orcid":"https://orcid.org/0000-0002-1253-8081"},"institutions":[{"id":"https://openalex.org/I93860229","display_name":"Politecnico di Milano","ror":"https://ror.org/01nffqt88","country_code":"IT","type":"education","lineage":["https://openalex.org/I93860229"]}],"countries":["IT"],"is_corresponding":false,"raw_author_name":"Paolo Cremonesi","raw_affiliation_strings":["Politecnico di Milano, Italy"],"affiliations":[{"raw_affiliation_string":"Politecnico di Milano, Italy","institution_ids":["https://openalex.org/I93860229"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5007661427"],"corresponding_institution_ids":["https://openalex.org/I93860229"],"apc_list":null,"apc_paid":null,"fwci":0.2839,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.63620746,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":94},"biblio":{"volume":"5","issue":null,"first_page":"656","last_page":"660"},"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/T12101","display_name":"Advanced Bandit Algorithms Research","score":0.9973999857902527,"subfield":{"id":"https://openalex.org/subfields/1803","display_name":"Management Science and Operations Research"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T10603","display_name":"Smart Grid Energy Management","score":0.9764000177383423,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/recommender-system","display_name":"Recommender system","score":0.8031424283981323},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.6958842277526855},{"id":"https://openalex.org/keywords/eigenvalues-and-eigenvectors","display_name":"Eigenvalues and eigenvectors","score":0.6620340347290039},{"id":"https://openalex.org/keywords/exploit","display_name":"Exploit","score":0.6154788136482239},{"id":"https://openalex.org/keywords/confidence-interval","display_name":"Confidence interval","score":0.5405288338661194},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.5223789811134338},{"id":"https://openalex.org/keywords/index","display_name":"Index (typography)","score":0.49298879504203796},{"id":"https://openalex.org/keywords/perturbation","display_name":"Perturbation (astronomy)","score":0.4493560791015625},{"id":"https://openalex.org/keywords/personalization","display_name":"Personalization","score":0.4352284073829651},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.3942148685455322},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.3615879714488983},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.33485960960388184},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.22981798648834229},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.18746787309646606},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.06427308917045593}],"concepts":[{"id":"https://openalex.org/C557471498","wikidata":"https://www.wikidata.org/wiki/Q554950","display_name":"Recommender system","level":2,"score":0.8031424283981323},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6958842277526855},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.6620340347290039},{"id":"https://openalex.org/C165696696","wikidata":"https://www.wikidata.org/wiki/Q11287","display_name":"Exploit","level":2,"score":0.6154788136482239},{"id":"https://openalex.org/C44249647","wikidata":"https://www.wikidata.org/wiki/Q208498","display_name":"Confidence interval","level":2,"score":0.5405288338661194},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5223789811134338},{"id":"https://openalex.org/C2777382242","wikidata":"https://www.wikidata.org/wiki/Q6017816","display_name":"Index (typography)","level":2,"score":0.49298879504203796},{"id":"https://openalex.org/C177918212","wikidata":"https://www.wikidata.org/wiki/Q803623","display_name":"Perturbation (astronomy)","level":2,"score":0.4493560791015625},{"id":"https://openalex.org/C183003079","wikidata":"https://www.wikidata.org/wiki/Q1000371","display_name":"Personalization","level":2,"score":0.4352284073829651},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.3942148685455322},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.3615879714488983},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.33485960960388184},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.22981798648834229},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.18746787309646606},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.06427308917045593},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1145/3460231.3478862","is_oa":false,"landing_page_url":"https://doi.org/10.1145/3460231.3478862","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Fifteenth ACM Conference on Recommender Systems","raw_type":"proceedings-article"},{"id":"pmh:oai:re.public.polimi.it:11311/1189066","is_oa":false,"landing_page_url":"https://hdl.handle.net/11311/1189066","pdf_url":null,"source":{"id":"https://openalex.org/S4306400312","display_name":"Virtual Community of Pathological Anatomy (University of Castilla La Mancha)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I79189158","host_organization_name":"University of Castilla-La Mancha","host_organization_lineage":["https://openalex.org/I79189158"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"info:eu-repo/semantics/conferenceObject"},{"id":"pmh:oai:re.public.polimi.it:11311/1223727","is_oa":false,"landing_page_url":"https://hdl.handle.net/11311/1223727","pdf_url":null,"source":{"id":"https://openalex.org/S4306400312","display_name":"Virtual Community of Pathological Anatomy (University of Castilla La Mancha)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I79189158","host_organization_name":"University of Castilla-La Mancha","host_organization_lineage":["https://openalex.org/I79189158"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/conferenceObject"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W154197214","https://openalex.org/W1500664688","https://openalex.org/W1587374567","https://openalex.org/W1971040550","https://openalex.org/W1971460272","https://openalex.org/W1987431925","https://openalex.org/W2031849834","https://openalex.org/W2036536766","https://openalex.org/W2101409192","https://openalex.org/W2108630796","https://openalex.org/W2109328649","https://openalex.org/W2133266261","https://openalex.org/W2142144955","https://openalex.org/W2155912844","https://openalex.org/W2196920274","https://openalex.org/W2201971810","https://openalex.org/W2219888463","https://openalex.org/W2606842163","https://openalex.org/W2889199783","https://openalex.org/W2907754626","https://openalex.org/W2908054697","https://openalex.org/W2912745432","https://openalex.org/W2954069222","https://openalex.org/W4251597219"],"related_works":["https://openalex.org/W17155033","https://openalex.org/W3207760230","https://openalex.org/W1496222301","https://openalex.org/W4312814274","https://openalex.org/W1590307681","https://openalex.org/W2536018345","https://openalex.org/W4285370786","https://openalex.org/W2296488620","https://openalex.org/W2358353312","https://openalex.org/W2353836703"],"abstract_inverted_index":{"Adding":[0],"confidence":[1,23,50,61,65,72],"estimates":[2],"to":[3,9,69,85,150],"predicted":[4],"ratings":[5,29],"has":[6,32,40],"been":[7,33,41],"shown":[8],"positively":[10],"influence":[11],"the":[12,15,45,87,104,109,113,116,122,144,152,159],"quality":[13],"of":[14,28,115,130,158],"recommendations":[16,73],"provided":[17,47],"by":[18,48],"a":[19,57,81,92,127],"recommender":[20,76],"system.":[21],"While":[22],"over":[24,132],"single":[25],"point":[26],"predictions":[27],"and":[30,112,120,135],"preferences":[31],"widely":[34],"studied":[35],"in":[36,43,67,156],"literature,":[37],"limited":[38],"effort":[39],"put":[42],"exploring":[44],"benefits":[46],"user-level":[49,60],"indices.":[51],"In":[52],"this":[53],"work":[54],"we":[55,90,147],"exploit":[56],"recently":[58],"introduced":[59],"index,":[62,66,88],"called":[63,99],"eigenvalue":[64,100],"order":[68],"provide":[70],"maximum":[71],"for":[74,96],"item-based":[75,97,138],"systems.":[77],"We":[78,118],"firstly":[79],"derive":[80],"closed":[82],"form":[83],"solution":[84],"calculate":[86],"then":[89],"propose":[91],"new":[93,145],"recommendation":[94,154],"methodology":[95],"models,":[98,139],"perturbation,":[101],"founded":[102],"on":[103],"strongly":[105],"positive":[106],"correlation":[107],"between":[108],"index":[110],"value":[111],"accuracy":[114,123],"recommendations.":[117],"show":[119],"discuss":[121],"results":[124],"obtained":[125],"with":[126],"comprehensive":[128],"set":[129],"experiments":[131],"several":[133],"datasets":[134],"using":[136],"different":[137],"empirically":[140],"proving":[141],"that":[142],"applying":[143],"technique":[146],"are":[148],"able":[149],"outperform":[151],"original":[153],"models":[155],"most":[157],"experimental":[160],"configurations.":[161]},"counts_by_year":[{"year":2024,"cited_by_count":1}],"updated_date":"2026-03-20T23:20:44.827607","created_date":"2025-10-10T00:00:00"}
