{"id":"https://openalex.org/W1975433880","doi":"https://doi.org/10.1109/ijcnn.2011.6033543","title":"A fast optimized semi-supervised non-negative Matrix Factorization algorithm","display_name":"A fast optimized semi-supervised non-negative Matrix Factorization algorithm","publication_year":2011,"publication_date":"2011-07-01","ids":{"openalex":"https://openalex.org/W1975433880","doi":"https://doi.org/10.1109/ijcnn.2011.6033543","mag":"1975433880"},"language":"en","primary_location":{"id":"doi:10.1109/ijcnn.2011.6033543","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ijcnn.2011.6033543","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The 2011 International Joint Conference on Neural Networks","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/A5013078199","display_name":"Noel Lopes","orcid":"https://orcid.org/0000-0003-2798-7274"},"institutions":[{"id":"https://openalex.org/I76903346","display_name":"University of Coimbra","ror":"https://ror.org/04z8k9a98","country_code":"PT","type":"education","lineage":["https://openalex.org/I76903346"]}],"countries":["PT"],"is_corresponding":true,"raw_author_name":"Noel Lopes","raw_affiliation_strings":["UDI/IPG-Polytechnic Institute of Guarda and CISUC, University of Coimbra, Portugal","UDI/IPG - Polytechnic Institute of Guarda and CISUC - University of Coimbra, Portugal"],"affiliations":[{"raw_affiliation_string":"UDI/IPG-Polytechnic Institute of Guarda and CISUC, University of Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]},{"raw_affiliation_string":"UDI/IPG - Polytechnic Institute of Guarda and CISUC - University of Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5046882659","display_name":"Bernardete Ribeiro","orcid":"https://orcid.org/0000-0002-9770-7672"},"institutions":[{"id":"https://openalex.org/I76903346","display_name":"University of Coimbra","ror":"https://ror.org/04z8k9a98","country_code":"PT","type":"education","lineage":["https://openalex.org/I76903346"]}],"countries":["PT"],"is_corresponding":false,"raw_author_name":"Bernardete Ribeiro","raw_affiliation_strings":["Department of Informatics Engineering and CISUC, Center of Informatics and Systems, University of Coimbra, Portugal","Department of Informatics Engineering and CISUC, Center of Informatics and Systems of the University of Coimbra, Portugal"],"affiliations":[{"raw_affiliation_string":"Department of Informatics Engineering and CISUC, Center of Informatics and Systems, University of Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]},{"raw_affiliation_string":"Department of Informatics Engineering and CISUC, Center of Informatics and Systems of the University of Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5013078199"],"corresponding_institution_ids":["https://openalex.org/I76903346"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":4,"citation_normalized_percentile":{"value":0.05740589,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"401","issue":null,"first_page":"2495","last_page":"2500"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10057","display_name":"Face and Expression Recognition","score":0.9993000030517578,"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"}},"topics":[{"id":"https://openalex.org/T10057","display_name":"Face and Expression Recognition","score":0.9993000030517578,"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":0.9947999715805054,"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/T10627","display_name":"Advanced Image and Video Retrieval Techniques","score":0.9922999739646912,"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/non-negative-matrix-factorization","display_name":"Non-negative matrix factorization","score":0.9341910481452942},{"id":"https://openalex.org/keywords/matrix-decomposition","display_name":"Matrix decomposition","score":0.7872604727745056},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7494143843650818},{"id":"https://openalex.org/keywords/face","display_name":"Face (sociological concept)","score":0.5335921049118042},{"id":"https://openalex.org/keywords/factorization","display_name":"Factorization","score":0.5305571556091309},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5126528143882751},{"id":"https://openalex.org/keywords/matrix","display_name":"Matrix (chemical analysis)","score":0.5109695196151733},{"id":"https://openalex.org/keywords/basis","display_name":"Basis (linear algebra)","score":0.5066481232643127},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5017342567443848},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.48054438829421997},{"id":"https://openalex.org/keywords/facial-recognition-system","display_name":"Facial recognition system","score":0.4159347712993622},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.35615620017051697},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.3412051200866699},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.14440810680389404}],"concepts":[{"id":"https://openalex.org/C152671427","wikidata":"https://www.wikidata.org/wiki/Q10843505","display_name":"Non-negative matrix factorization","level":4,"score":0.9341910481452942},{"id":"https://openalex.org/C42355184","wikidata":"https://www.wikidata.org/wiki/Q1361088","display_name":"Matrix decomposition","level":3,"score":0.7872604727745056},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7494143843650818},{"id":"https://openalex.org/C2779304628","wikidata":"https://www.wikidata.org/wiki/Q3503480","display_name":"Face (sociological concept)","level":2,"score":0.5335921049118042},{"id":"https://openalex.org/C187834632","wikidata":"https://www.wikidata.org/wiki/Q188804","display_name":"Factorization","level":2,"score":0.5305571556091309},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5126528143882751},{"id":"https://openalex.org/C106487976","wikidata":"https://www.wikidata.org/wiki/Q685816","display_name":"Matrix (chemical analysis)","level":2,"score":0.5109695196151733},{"id":"https://openalex.org/C12426560","wikidata":"https://www.wikidata.org/wiki/Q189569","display_name":"Basis (linear algebra)","level":2,"score":0.5066481232643127},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5017342567443848},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.48054438829421997},{"id":"https://openalex.org/C31510193","wikidata":"https://www.wikidata.org/wiki/Q1192553","display_name":"Facial recognition system","level":3,"score":0.4159347712993622},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.35615620017051697},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.3412051200866699},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.14440810680389404},{"id":"https://openalex.org/C144024400","wikidata":"https://www.wikidata.org/wiki/Q21201","display_name":"Sociology","level":0,"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/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C36289849","wikidata":"https://www.wikidata.org/wiki/Q34749","display_name":"Social science","level":1,"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/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"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/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/ijcnn.2011.6033543","is_oa":false,"landing_page_url":"https://doi.org/10.1109/ijcnn.2011.6033543","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The 2011 International Joint Conference on Neural Networks","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Industry, innovation and infrastructure","score":0.4300000071525574,"id":"https://metadata.un.org/sdg/9"}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":15,"referenced_works":["https://openalex.org/W1580175113","https://openalex.org/W1606870026","https://openalex.org/W1900549406","https://openalex.org/W1902027874","https://openalex.org/W2029343251","https://openalex.org/W2102536337","https://openalex.org/W2134823866","https://openalex.org/W2142584058","https://openalex.org/W2145072329","https://openalex.org/W2148165597","https://openalex.org/W2148429804","https://openalex.org/W4253238332","https://openalex.org/W6679943726","https://openalex.org/W6681619315","https://openalex.org/W7034030072"],"related_works":["https://openalex.org/W2127243424","https://openalex.org/W4390394189","https://openalex.org/W2037504162","https://openalex.org/W2539013788","https://openalex.org/W2792706544","https://openalex.org/W1568451138","https://openalex.org/W2156699640","https://openalex.org/W2972997031","https://openalex.org/W2045265907","https://openalex.org/W2146544734"],"abstract_inverted_index":{"Non-negative":[0],"Matrix":[1],"Factorization":[2],"(NMF)":[3],"is":[4],"an":[5],"unsupervised":[6],"technique":[7],"that":[8,44],"projects":[9],"data":[10],"into":[11],"lower":[12],"dimensional":[13],"spaces,":[14],"effectively":[15],"reducing":[16],"the":[17,26,32,46,51,60,66],"number":[18],"of":[19,21,53],"features":[20],"a":[22,40],"dataset":[23],"while":[24,49],"retaining":[25],"basis":[27],"information":[28],"necessary":[29],"to":[30,59],"reconstruct":[31],"original":[33],"data.":[34],"In":[35],"this":[36],"paper":[37],"we":[38],"present":[39],"semi-supervised":[41],"NMF":[42],"approach":[43],"reduces":[45],"computational":[47],"cost":[48],"improving":[50],"accuracy":[52],"NMF-based":[54],"models.":[55],"The":[56],"advantages":[57],"inherent":[58],"proposed":[61],"method":[62],"are":[63],"supported":[64],"by":[65],"results":[67],"obtained":[68],"in":[69],"two":[70],"well-known":[71],"face":[72],"recognition":[73],"benchmarks.":[74]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":1},{"year":2015,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}