{"id":"https://openalex.org/W50220408","doi":"https://doi.org/10.21437/eurospeech.2003-183","title":"Nonlinear analysis of speech signals: generalized dimensions and lyapunov exponents","display_name":"Nonlinear analysis of speech signals: generalized dimensions and lyapunov exponents","publication_year":2003,"publication_date":"2003-09-01","ids":{"openalex":"https://openalex.org/W50220408","doi":"https://doi.org/10.21437/eurospeech.2003-183","mag":"50220408"},"language":"en","primary_location":{"id":"doi:10.21437/eurospeech.2003-183","is_oa":false,"landing_page_url":"https://doi.org/10.21437/eurospeech.2003-183","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"8th European Conference on Speech Communication and Technology (Eurospeech 2003)","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"http://hdl.handle.net/123456789/26723","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5040922549","display_name":"Vassilis Pitsikalis","orcid":"https://orcid.org/0000-0002-1593-7491"},"institutions":[{"id":"https://openalex.org/I174458059","display_name":"National Technical University of Athens","ror":"https://ror.org/03cx6bg69","country_code":"GR","type":"education","lineage":["https://openalex.org/I174458059"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Vassilis Pitsikalis","raw_affiliation_strings":["National Technical University Of Athens"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Technical University Of Athens","institution_ids":["https://openalex.org/I174458059"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5077035803","display_name":"Iasonas Kokkinos","orcid":"https://orcid.org/0000-0002-2606-6476"},"institutions":[{"id":"https://openalex.org/I174458059","display_name":"National Technical University of Athens","ror":"https://ror.org/03cx6bg69","country_code":"GR","type":"education","lineage":["https://openalex.org/I174458059"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Iasonas Kokkinos","raw_affiliation_strings":["National Technical University Of Athens"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Technical University Of Athens","institution_ids":["https://openalex.org/I174458059"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5079243420","display_name":"Petros Maragos","orcid":"https://orcid.org/0000-0003-0534-2707"},"institutions":[{"id":"https://openalex.org/I174458059","display_name":"National Technical University of Athens","ror":"https://ror.org/03cx6bg69","country_code":"GR","type":"education","lineage":["https://openalex.org/I174458059"]}],"countries":["GR"],"is_corresponding":false,"raw_author_name":"Petros Maragos","raw_affiliation_strings":["National Technical University Of Athens"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Technical University Of Athens","institution_ids":["https://openalex.org/I174458059"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I174458059"],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":27,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"817","last_page":"820"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10244","display_name":"Chaos control and synchronization","score":0.9983999729156494,"subfield":{"id":"https://openalex.org/subfields/3109","display_name":"Statistical and Nonlinear Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10244","display_name":"Chaos control and synchronization","score":0.9983999729156494,"subfield":{"id":"https://openalex.org/subfields/3109","display_name":"Statistical and Nonlinear Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12946","display_name":"Fractal and DNA sequence analysis","score":0.9970999956130981,"subfield":{"id":"https://openalex.org/subfields/1312","display_name":"Molecular Biology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},{"id":"https://openalex.org/T10320","display_name":"Neural Networks and Applications","score":0.9896000027656555,"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"}}],"keywords":[{"id":"https://openalex.org/keywords/lyapunov-exponent","display_name":"Lyapunov exponent","score":0.8389064073562622},{"id":"https://openalex.org/keywords/attractor","display_name":"Attractor","score":0.7970483899116516},{"id":"https://openalex.org/keywords/nonlinear-system","display_name":"Nonlinear system","score":0.6882738471031189},{"id":"https://openalex.org/keywords/fractal","display_name":"Fractal","score":0.6378255486488342},{"id":"https://openalex.org/keywords/phase-space","display_name":"Phase space","score":0.6278435587882996},{"id":"https://openalex.org/keywords/chaotic","display_name":"Chaotic","score":0.6141820549964905},{"id":"https://openalex.org/keywords/invariant","display_name":"Invariant (physics)","score":0.5668534636497498},{"id":"https://openalex.org/keywords/divergence","display_name":"Divergence (linguistics)","score":0.5443801283836365},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.45253002643585205},{"id":"https://openalex.org/keywords/feature-vector","display_name":"Feature vector","score":0.4462340474128723},{"id":"https://openalex.org/keywords/exponential-function","display_name":"Exponential function","score":0.421644389629364},{"id":"https://openalex.org/keywords/fractal-dimension","display_name":"Fractal dimension","score":0.41942986845970154},{"id":"https://openalex.org/keywords/applied-mathematics","display_name":"Applied mathematics","score":0.4164339005947113},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.39364972710609436},{"id":"https://openalex.org/keywords/statistical-physics","display_name":"Statistical physics","score":0.32642972469329834},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.2816639244556427},{"id":"https://openalex.org/keywords/mathematical-analysis","display_name":"Mathematical analysis","score":0.26106590032577515},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.10767626762390137}],"concepts":[{"id":"https://openalex.org/C191544260","wikidata":"https://www.wikidata.org/wiki/Q1238630","display_name":"Lyapunov exponent","level":3,"score":0.8389064073562622},{"id":"https://openalex.org/C164380108","wikidata":"https://www.wikidata.org/wiki/Q507187","display_name":"Attractor","level":2,"score":0.7970483899116516},{"id":"https://openalex.org/C158622935","wikidata":"https://www.wikidata.org/wiki/Q660848","display_name":"Nonlinear system","level":2,"score":0.6882738471031189},{"id":"https://openalex.org/C40636538","wikidata":"https://www.wikidata.org/wiki/Q81392","display_name":"Fractal","level":2,"score":0.6378255486488342},{"id":"https://openalex.org/C151342819","wikidata":"https://www.wikidata.org/wiki/Q62542","display_name":"Phase space","level":2,"score":0.6278435587882996},{"id":"https://openalex.org/C2777052490","wikidata":"https://www.wikidata.org/wiki/Q5072826","display_name":"Chaotic","level":2,"score":0.6141820549964905},{"id":"https://openalex.org/C190470478","wikidata":"https://www.wikidata.org/wiki/Q2370229","display_name":"Invariant (physics)","level":2,"score":0.5668534636497498},{"id":"https://openalex.org/C207390915","wikidata":"https://www.wikidata.org/wiki/Q1230525","display_name":"Divergence (linguistics)","level":2,"score":0.5443801283836365},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.45253002643585205},{"id":"https://openalex.org/C83665646","wikidata":"https://www.wikidata.org/wiki/Q42139305","display_name":"Feature vector","level":2,"score":0.4462340474128723},{"id":"https://openalex.org/C151376022","wikidata":"https://www.wikidata.org/wiki/Q168698","display_name":"Exponential function","level":2,"score":0.421644389629364},{"id":"https://openalex.org/C26546657","wikidata":"https://www.wikidata.org/wiki/Q1412452","display_name":"Fractal dimension","level":3,"score":0.41942986845970154},{"id":"https://openalex.org/C28826006","wikidata":"https://www.wikidata.org/wiki/Q33521","display_name":"Applied mathematics","level":1,"score":0.4164339005947113},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.39364972710609436},{"id":"https://openalex.org/C121864883","wikidata":"https://www.wikidata.org/wiki/Q677916","display_name":"Statistical physics","level":1,"score":0.32642972469329834},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.2816639244556427},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.26106590032577515},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.10767626762390137},{"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/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C37914503","wikidata":"https://www.wikidata.org/wiki/Q156495","display_name":"Mathematical physics","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.21437/eurospeech.2003-183","is_oa":false,"landing_page_url":"https://doi.org/10.21437/eurospeech.2003-183","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"8th European Conference on Speech Communication and Technology (Eurospeech 2003)","raw_type":"proceedings-article"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.119.7910","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.119.7910","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://www.stat.ucla.edu/~jkokkin/Pitsikalis_Kokkinos_Maragos_Eurospeech2003.pdf","raw_type":"text"},{"id":"pmh:oai:dspace.lib.ntua.gr:123456789/26723","is_oa":true,"landing_page_url":"http://hdl.handle.net/123456789/26723","pdf_url":null,"source":{"id":"https://openalex.org/S4377196837","display_name":"DSpace - NTUA (National Technical University of Athens)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I174458059","host_organization_name":"National Technical University of Athens","host_organization_lineage":["https://openalex.org/I174458059"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/article"},{"id":"pmh:oai:eprints.ucl.ac.uk.OAI2:1520180","is_oa":false,"landing_page_url":"http://discovery.ucl.ac.uk/1520180/","pdf_url":null,"source":{"id":"https://openalex.org/S4306400024","display_name":"UCL Discovery (University College London)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I45129253","host_organization_name":"University College London","host_organization_lineage":["https://openalex.org/I45129253"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"     In:    (pp. pp. 817-820).   (2003)     ","raw_type":"Proceedings paper"}],"best_oa_location":{"id":"pmh:oai:dspace.lib.ntua.gr:123456789/26723","is_oa":true,"landing_page_url":"http://hdl.handle.net/123456789/26723","pdf_url":null,"source":{"id":"https://openalex.org/S4377196837","display_name":"DSpace - NTUA (National Technical University of Athens)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I174458059","host_organization_name":"National Technical University of Athens","host_organization_lineage":["https://openalex.org/I174458059"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/article"},"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/4","score":0.47999998927116394,"display_name":"Quality Education"}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":18,"referenced_works":["https://openalex.org/W1520377010","https://openalex.org/W1536822605","https://openalex.org/W2010187498","https://openalex.org/W2019207321","https://openalex.org/W2053255464","https://openalex.org/W2068844879","https://openalex.org/W2073955790","https://openalex.org/W2077186504","https://openalex.org/W2079325629","https://openalex.org/W2101680822","https://openalex.org/W2139364442","https://openalex.org/W2143908786","https://openalex.org/W2148044000","https://openalex.org/W2165006208","https://openalex.org/W2167453906","https://openalex.org/W2179264759","https://openalex.org/W2798909945","https://openalex.org/W2798982815"],"related_works":["https://openalex.org/W2973136064","https://openalex.org/W2562509657","https://openalex.org/W1168863844","https://openalex.org/W2618142611","https://openalex.org/W2394617381","https://openalex.org/W4280554182","https://openalex.org/W2144002436","https://openalex.org/W2171160532","https://openalex.org/W2095454919","https://openalex.org/W2012691558"],"abstract_inverted_index":{"In":[0],"this":[1],"paper,":[2],"we":[3,80],"explore":[4],"modern":[5],"methods":[6],"and":[7,22,31,69,112],"algorithms":[8],"from":[9],"fractal/chaotic":[10],"systems":[11],"theory":[12],"for":[13,40],"modeling":[14],"speech":[15],"signals":[16],"in":[17],"a":[18],"multidimensional":[19,45],"phase":[20,46],"space":[21],"extracting":[23],"characteristic":[24],"invariant":[25],"measures":[26,35],"like":[27],"generalized":[28],"fractal":[29],"dimensions":[30],"Lyapunov":[32],"exponents.":[33],"Such":[34],"can":[36],"capture":[37],"valuable":[38],"information":[39,102],"the":[41,44,52,60,64,70,82,101],"characterisation":[42],"of":[43,72,75,85,95],"space-":[47],"which":[48,63],"is":[49,110],"closer":[50],"to":[51,59],"true":[53],"dynamics-":[54],"since":[55],"they":[56],"are":[57],"sensitive":[58],"frequency":[61],"with":[62],"attractor":[65],"visits":[66],"different":[67],"regions":[68],"rate":[71],"exponential":[73],"divergence":[74],"nearby":[76],"orbits,":[77],"respectively.":[78],"Further":[79],"examine":[81],"classification":[83],"capability":[84],"related":[86],"nonlinear":[87,107],"features":[88],"over":[89],"broad":[90],"phoneme":[91],"classes.":[92],"The":[93],"results":[94],"these":[96,105],"preliminary":[97],"experiments":[98],"indicate":[99],"that":[100],"carried":[103],"by":[104],"novel":[106],"feature":[108],"sets":[109],"important":[111],"useful.":[113],"1.":[114]},"counts_by_year":[{"year":2021,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":2},{"year":2013,"cited_by_count":2},{"year":2012,"cited_by_count":3}],"updated_date":"2026-07-15T18:14:33.161393","created_date":"2025-10-10T00:00:00"}
