{"id":"https://openalex.org/W1828495132","doi":"https://doi.org/10.1007/978-3-642-04394-9_37","title":"Knowledge Extraction with Non-Negative Matrix Factorization for Text Classification","display_name":"Knowledge Extraction with Non-Negative Matrix Factorization for Text Classification","publication_year":2009,"publication_date":"2009-01-01","ids":{"openalex":"https://openalex.org/W1828495132","doi":"https://doi.org/10.1007/978-3-642-04394-9_37","mag":"1828495132"},"language":"en","primary_location":{"id":"doi:10.1007/978-3-642-04394-9_37","is_oa":false,"landing_page_url":"https://doi.org/10.1007/978-3-642-04394-9_37","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"},"type":"book-chapter","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/A5100371897","display_name":"Catarina Silva","orcid":"https://orcid.org/0000-0002-5656-0061"},"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"]},{"id":"https://openalex.org/I169427155","display_name":"Instituto Polit\u00e9cnico de Leiria","ror":"https://ror.org/010dvvh94","country_code":"PT","type":"education","lineage":["https://openalex.org/I169427155"]}],"countries":["PT"],"is_corresponding":true,"raw_author_name":"Catarina Silva","raw_affiliation_strings":["Department of Informatics Engineering, Center for Informatics and Systems (CISUC), University of Coimbra, Polo II, P-3030-290, Coimbra, Portugal","School of Technology and Management of the Polytechnic Institute of Leiria, Morro do Lena - Alto do Vieiro, Portugal, P-2411-901, Leiria, Portugal"],"affiliations":[{"raw_affiliation_string":"Department of Informatics Engineering, Center for Informatics and Systems (CISUC), University of Coimbra, Polo II, P-3030-290, Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]},{"raw_affiliation_string":"School of Technology and Management of the Polytechnic Institute of Leiria, Morro do Lena - Alto do Vieiro, Portugal, P-2411-901, Leiria, Portugal","institution_ids":["https://openalex.org/I169427155"]}]},{"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, Center for Informatics and Systems (CISUC), University of Coimbra, Polo II, P-3030-290, Coimbra, Portugal"],"affiliations":[{"raw_affiliation_string":"Department of Informatics Engineering, Center for Informatics and Systems (CISUC), University of Coimbra, Polo II, P-3030-290, Coimbra, Portugal","institution_ids":["https://openalex.org/I76903346"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5100371897"],"corresponding_institution_ids":["https://openalex.org/I169427155","https://openalex.org/I76903346"],"apc_list":{"value":5000,"currency":"EUR","value_usd":5392},"apc_paid":null,"fwci":0.5789,"has_fulltext":false,"cited_by_count":4,"citation_normalized_percentile":{"value":0.69118745,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":95},"biblio":{"volume":null,"issue":null,"first_page":"300","last_page":"308"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11550","display_name":"Text and Document Classification Technologies","score":0.9994000196456909,"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"}},"topics":[{"id":"https://openalex.org/T11550","display_name":"Text and Document Classification Technologies","score":0.9994000196456909,"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/T13083","display_name":"Advanced Text Analysis Techniques","score":0.9955999851226807,"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/T10824","display_name":"Image Retrieval and Classification Techniques","score":0.991100013256073,"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/computer-science","display_name":"Computer science","score":0.811002790927887},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5528584718704224},{"id":"https://openalex.org/keywords/non-negative-matrix-factorization","display_name":"Non-negative matrix factorization","score":0.47397488355636597},{"id":"https://openalex.org/keywords/matrix-decomposition","display_name":"Matrix decomposition","score":0.46293798089027405},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.43104174733161926},{"id":"https://openalex.org/keywords/natural-language-processing","display_name":"Natural language processing","score":0.355604887008667}],"concepts":[{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.811002790927887},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5528584718704224},{"id":"https://openalex.org/C152671427","wikidata":"https://www.wikidata.org/wiki/Q10843505","display_name":"Non-negative matrix factorization","level":4,"score":0.47397488355636597},{"id":"https://openalex.org/C42355184","wikidata":"https://www.wikidata.org/wiki/Q1361088","display_name":"Matrix decomposition","level":3,"score":0.46293798089027405},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.43104174733161926},{"id":"https://openalex.org/C204321447","wikidata":"https://www.wikidata.org/wiki/Q30642","display_name":"Natural language processing","level":1,"score":0.355604887008667},{"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},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/978-3-642-04394-9_37","is_oa":false,"landing_page_url":"https://doi.org/10.1007/978-3-642-04394-9_37","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"}],"best_oa_location":null,"sustainable_development_goals":[{"display_name":"Quality Education","id":"https://metadata.un.org/sdg/4","score":0.7300000190734863}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":27,"referenced_works":["https://openalex.org/W1512430500","https://openalex.org/W1793885322","https://openalex.org/W1902027874","https://openalex.org/W1997851541","https://openalex.org/W2013029404","https://openalex.org/W2017288758","https://openalex.org/W2059745395","https://openalex.org/W2094934653","https://openalex.org/W2107743791","https://openalex.org/W2110096996","https://openalex.org/W2113359929","https://openalex.org/W2118718620","https://openalex.org/W2132538571","https://openalex.org/W2135029798","https://openalex.org/W2136787567","https://openalex.org/W2142515059","https://openalex.org/W2148429804","https://openalex.org/W2148694408","https://openalex.org/W2152320972","https://openalex.org/W2152698810","https://openalex.org/W2156909104","https://openalex.org/W2531326634","https://openalex.org/W2561675875","https://openalex.org/W3143596294","https://openalex.org/W4230674625","https://openalex.org/W4233135949","https://openalex.org/W4292023222"],"related_works":["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/W2045265907","https://openalex.org/W2972997031","https://openalex.org/W34555840","https://openalex.org/W2146544734"],"abstract_inverted_index":null,"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2013,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}