{"id":"https://openalex.org/W1989800045","doi":"https://doi.org/10.1145/1272743.1272749","title":"Efficient top- <i>k</i> aggregation of ranked inputs","display_name":"Efficient top- <i>k</i> aggregation of ranked inputs","publication_year":2007,"publication_date":"2007-08-01","ids":{"openalex":"https://openalex.org/W1989800045","doi":"https://doi.org/10.1145/1272743.1272749","mag":"1989800045"},"language":"en","primary_location":{"id":"doi:10.1145/1272743.1272749","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1272743.1272749","pdf_url":null,"source":{"id":"https://openalex.org/S90119964","display_name":"ACM Transactions on Database Systems","issn_l":"0362-5915","issn":["0362-5915","1557-4644"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319798","host_organization_name":"Association for Computing Machinery","host_organization_lineage":["https://openalex.org/P4310319798"],"host_organization_lineage_names":["Association for Computing Machinery"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ACM Transactions on Database Systems","raw_type":"journal-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/A5045731304","display_name":"Nikos Mamoulis","orcid":null},"institutions":[{"id":"https://openalex.org/I889458895","display_name":"University of Hong Kong","ror":"https://ror.org/02zhqgq86","country_code":"HK","type":"education","lineage":["https://openalex.org/I889458895"]}],"countries":["HK"],"is_corresponding":true,"raw_author_name":"Nikos Mamoulis","raw_affiliation_strings":["University of Hong Kong, Pokfulam Road, Hong Kong"],"affiliations":[{"raw_affiliation_string":"University of Hong Kong, Pokfulam Road, Hong Kong","institution_ids":["https://openalex.org/I889458895"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017431281","display_name":"Man Lung Yiu","orcid":"https://orcid.org/0000-0002-9619-4924"},"institutions":[{"id":"https://openalex.org/I891191580","display_name":"Aalborg University","ror":"https://ror.org/04m5j1k67","country_code":"DK","type":"education","lineage":["https://openalex.org/I891191580"]}],"countries":["DK"],"is_corresponding":false,"raw_author_name":"Man Lung Yiu","raw_affiliation_strings":["Aalborg University, Aalborg, Denmark"],"affiliations":[{"raw_affiliation_string":"Aalborg University, Aalborg, Denmark","institution_ids":["https://openalex.org/I891191580"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5018063682","display_name":"Kit Hung Cheng","orcid":null},"institutions":[{"id":"https://openalex.org/I889458895","display_name":"University of Hong Kong","ror":"https://ror.org/02zhqgq86","country_code":"HK","type":"education","lineage":["https://openalex.org/I889458895"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"Kit Hung Cheng","raw_affiliation_strings":["University of Hong Kong, Pokfulam Road, Hong Kong"],"affiliations":[{"raw_affiliation_string":"University of Hong Kong, Pokfulam Road, Hong Kong","institution_ids":["https://openalex.org/I889458895"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5108756735","display_name":"David W. Cheung","orcid":null},"institutions":[{"id":"https://openalex.org/I889458895","display_name":"University of Hong Kong","ror":"https://ror.org/02zhqgq86","country_code":"HK","type":"education","lineage":["https://openalex.org/I889458895"]}],"countries":["HK"],"is_corresponding":false,"raw_author_name":"David W. Cheung","raw_affiliation_strings":["University of Hong Kong, Pokfulam Road, Hong Kong"],"affiliations":[{"raw_affiliation_string":"University of Hong Kong, Pokfulam Road, Hong Kong","institution_ids":["https://openalex.org/I889458895"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5045731304"],"corresponding_institution_ids":["https://openalex.org/I889458895"],"apc_list":null,"apc_paid":null,"fwci":6.0141,"has_fulltext":false,"cited_by_count":106,"citation_normalized_percentile":{"value":0.9682971,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":100},"biblio":{"volume":"32","issue":"3","first_page":"19","last_page":"19"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T11106","display_name":"Data Management and Algorithms","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/T10317","display_name":"Advanced Database Systems and Queries","score":0.9976000189781189,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"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/T10538","display_name":"Data Mining Algorithms and Applications","score":0.9908999800682068,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8967224359512329},{"id":"https://openalex.org/keywords/aggregate","display_name":"Aggregate (composite)","score":0.6491158604621887},{"id":"https://openalex.org/keywords/computation","display_name":"Computation","score":0.5327444076538086},{"id":"https://openalex.org/keywords/object","display_name":"Object (grammar)","score":0.49618393182754517},{"id":"https://openalex.org/keywords/set","display_name":"Set (abstract data type)","score":0.4945802390575409},{"id":"https://openalex.org/keywords/key","display_name":"Key (lock)","score":0.4891224503517151},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.4757877588272095},{"id":"https://openalex.org/keywords/monotone-polygon","display_name":"Monotone polygon","score":0.46725723147392273},{"id":"https://openalex.org/keywords/join","display_name":"Join (topology)","score":0.4478526711463928},{"id":"https://openalex.org/keywords/auxiliary-memory","display_name":"Auxiliary memory","score":0.4396759271621704},{"id":"https://openalex.org/keywords/data-structure","display_name":"Data structure","score":0.43570196628570557},{"id":"https://openalex.org/keywords/function","display_name":"Function (biology)","score":0.4255000948905945},{"id":"https://openalex.org/keywords/parallel-computing","display_name":"Parallel computing","score":0.39447087049484253},{"id":"https://openalex.org/keywords/theoretical-computer-science","display_name":"Theoretical computer science","score":0.3814391791820526},{"id":"https://openalex.org/keywords/programming-language","display_name":"Programming language","score":0.11079692840576172}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8967224359512329},{"id":"https://openalex.org/C4679612","wikidata":"https://www.wikidata.org/wiki/Q866298","display_name":"Aggregate (composite)","level":2,"score":0.6491158604621887},{"id":"https://openalex.org/C45374587","wikidata":"https://www.wikidata.org/wiki/Q12525525","display_name":"Computation","level":2,"score":0.5327444076538086},{"id":"https://openalex.org/C2781238097","wikidata":"https://www.wikidata.org/wiki/Q175026","display_name":"Object (grammar)","level":2,"score":0.49618393182754517},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.4945802390575409},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.4891224503517151},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.4757877588272095},{"id":"https://openalex.org/C2834757","wikidata":"https://www.wikidata.org/wiki/Q4925424","display_name":"Monotone polygon","level":2,"score":0.46725723147392273},{"id":"https://openalex.org/C2776124973","wikidata":"https://www.wikidata.org/wiki/Q3183033","display_name":"Join (topology)","level":2,"score":0.4478526711463928},{"id":"https://openalex.org/C82687282","wikidata":"https://www.wikidata.org/wiki/Q66221","display_name":"Auxiliary memory","level":2,"score":0.4396759271621704},{"id":"https://openalex.org/C162319229","wikidata":"https://www.wikidata.org/wiki/Q175263","display_name":"Data structure","level":2,"score":0.43570196628570557},{"id":"https://openalex.org/C14036430","wikidata":"https://www.wikidata.org/wiki/Q3736076","display_name":"Function (biology)","level":2,"score":0.4255000948905945},{"id":"https://openalex.org/C173608175","wikidata":"https://www.wikidata.org/wiki/Q232661","display_name":"Parallel computing","level":1,"score":0.39447087049484253},{"id":"https://openalex.org/C80444323","wikidata":"https://www.wikidata.org/wiki/Q2878974","display_name":"Theoretical computer science","level":1,"score":0.3814391791820526},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.11079692840576172},{"id":"https://openalex.org/C9390403","wikidata":"https://www.wikidata.org/wiki/Q3966","display_name":"Computer hardware","level":1,"score":0.0},{"id":"https://openalex.org/C114614502","wikidata":"https://www.wikidata.org/wiki/Q76592","display_name":"Combinatorics","level":1,"score":0.0},{"id":"https://openalex.org/C78458016","wikidata":"https://www.wikidata.org/wiki/Q840400","display_name":"Evolutionary biology","level":1,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"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/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.0},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","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}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1145/1272743.1272749","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1272743.1272749","pdf_url":null,"source":{"id":"https://openalex.org/S90119964","display_name":"ACM Transactions on Database Systems","issn_l":"0362-5915","issn":["0362-5915","1557-4644"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319798","host_organization_name":"Association for Computing Machinery","host_organization_lineage":["https://openalex.org/P4310319798"],"host_organization_lineage_names":["Association for Computing Machinery"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"ACM Transactions on Database Systems","raw_type":"journal-article"},{"id":"pmh:oai:hub.hku.hk:10722/88889","is_oa":false,"landing_page_url":"http://hdl.handle.net/10722/88889","pdf_url":null,"source":{"id":"https://openalex.org/S4377196271","display_name":"The HKU Scholars Hub (University of Hong Kong)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I889458895","host_organization_name":"University of Hong Kong","host_organization_lineage":["https://openalex.org/I889458895"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Article"},{"id":"pmh:oai:pure.atira.dk:publications/262db120-a31d-11dc-8188-000ea68e967b","is_oa":false,"landing_page_url":"https://vbn.aau.dk/da/publications/262db120-a31d-11dc-8188-000ea68e967b","pdf_url":null,"source":{"id":"https://openalex.org/S4306401731","display_name":"VBN Forskningsportal (Aalborg Universitet)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I891191580","host_organization_name":"Aalborg University","host_organization_lineage":["https://openalex.org/I891191580"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Mamoulis, N, Yiu, M L, Cheng, K H & Cheung, D W 2007, 'Efficient Top-k Aggregation of Ranked Inputs', ACM Transactions on Database Systems, vol. 32, no. 3. https://doi.org/10.1145/1272743.1272749","raw_type":"info:eu-repo/semantics/publishedVersion"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":34,"referenced_works":["https://openalex.org/W65091138","https://openalex.org/W1535279741","https://openalex.org/W1600580971","https://openalex.org/W1672197616","https://openalex.org/W1850437073","https://openalex.org/W1971640526","https://openalex.org/W1985986751","https://openalex.org/W2020919487","https://openalex.org/W2046144220","https://openalex.org/W2083039049","https://openalex.org/W2086174602","https://openalex.org/W2093979658","https://openalex.org/W2099797738","https://openalex.org/W2103201239","https://openalex.org/W2106742801","https://openalex.org/W2106774319","https://openalex.org/W2116936708","https://openalex.org/W2117281615","https://openalex.org/W2119806435","https://openalex.org/W2125336854","https://openalex.org/W2126500482","https://openalex.org/W2127003315","https://openalex.org/W2134195632","https://openalex.org/W2134206624","https://openalex.org/W2141649964","https://openalex.org/W2142385580","https://openalex.org/W2143682328","https://openalex.org/W2148322068","https://openalex.org/W2157734198","https://openalex.org/W2166855749","https://openalex.org/W2168960477","https://openalex.org/W2170188482","https://openalex.org/W4206237997","https://openalex.org/W4254335296"],"related_works":["https://openalex.org/W2072336782","https://openalex.org/W2041762692","https://openalex.org/W144222265","https://openalex.org/W2567477113","https://openalex.org/W2088116875","https://openalex.org/W2084587984","https://openalex.org/W3182798723","https://openalex.org/W1833013272","https://openalex.org/W111382830","https://openalex.org/W2093612905"],"abstract_inverted_index":{"A":[0],"top-":[1,41,77,129,161,173,185],"k":[2,16,42,78,130,162,174,186],"query":[3],"combines":[4],"different":[5],"rankings":[6],"of":[7,11,66,76,108,128,152,171,184,191,220],"the":[8,15,19,64,69,73,100,125,138,141,145,182,189],"same":[9],"set":[10],"objects":[12,17],"and":[13,72,91,111,157,180,188,193,203],"returns":[14],"with":[18,80,165,201],"highest":[20],"combined":[21],"score":[22],"according":[23],"to":[24,30,62,209],"an":[25,86],"aggregate":[26,82],"function.":[27],"We":[28,84,155],"bring":[29],"light":[31],"some":[32],"key":[33],"observations,":[34],"which":[35,59,123],"impose":[36],"two":[37],"phases":[38],"that":[39,93,132],"any":[40],"algorithm,":[43,58],"based":[44],"on":[45,52],"sorted":[46,135],"accesses,":[47,68,110],"should":[48],"go":[49],"through.":[50],"Based":[51],"them,":[53],"we":[54,118,148,178],"propose":[55,149,156],"a":[56,115,120,159],"new":[57],"is":[60,95],"designed":[61],"minimize":[63],"number":[65],"object":[67],"computational":[70],"cost,":[71],"memory":[74,112,126],"requirements":[75,127],"search":[79],"monotone":[81],"functions.":[83],"provide":[85],"analysis":[87],"for":[88],"its":[89],"cost":[90],"show":[92,206],"it":[94],"always":[96],"no":[97],"worse":[98],"than":[99],"baseline":[101],"\u201cno":[102],"random":[103],"accesses\u201d":[104],"algorithm":[105],"in":[106,196],"terms":[107],"computations,":[109],"required.":[113],"As":[114],"side":[116],"contribution,":[117],"perform":[119,134],"space":[121,143],"analysis,":[122],"indicates":[124],"algorithms":[131],"only":[133],"accesses.":[136],"For":[137],"case,":[139],"where":[140],"required":[142],"exceeds":[144],"available":[146],"memory,":[147],"disk-based":[150],"variants":[151],"our":[153,212],"algorithm.":[154],"optimize":[158],"multiway":[160],"join":[163,175],"operator,":[164],"certain":[166],"advantages":[167],"over":[168],"evaluation":[169],"trees":[170],"binary":[172],"operators.":[176],"Finally,":[177],"define":[179],"study":[181],"computation":[183],"cubes":[187],"implementation":[190],"roll-up":[192],"drill-down":[194],"operations":[195],"such":[197],"cubes.":[198],"Extensive":[199],"experiments":[200],"synthetic":[202],"real":[204],"data":[205],"that,":[207],"compared":[208],"previous":[210],"techniques,":[211],"method":[213],"accesses":[214],"fewer":[215],"objects,":[216],"while":[217],"being":[218],"orders":[219],"magnitude":[221],"faster.":[222]},"counts_by_year":[{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":2},{"year":2021,"cited_by_count":4},{"year":2020,"cited_by_count":9},{"year":2019,"cited_by_count":5},{"year":2018,"cited_by_count":2},{"year":2017,"cited_by_count":5},{"year":2016,"cited_by_count":9},{"year":2015,"cited_by_count":5},{"year":2014,"cited_by_count":11},{"year":2013,"cited_by_count":5},{"year":2012,"cited_by_count":13}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2016-06-24T00:00:00"}