{"id":"https://openalex.org/W1554248744","doi":"https://doi.org/10.1109/iscas.2015.7168571","title":"Effects of two new features of approximate entropy and sample entropy on cardiac arrest prediction","display_name":"Effects of two new features of approximate entropy and sample entropy on cardiac arrest prediction","publication_year":2015,"publication_date":"2015-05-01","ids":{"openalex":"https://openalex.org/W1554248744","doi":"https://doi.org/10.1109/iscas.2015.7168571","mag":"1554248744"},"language":"en","primary_location":{"id":"doi:10.1109/iscas.2015.7168571","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iscas.2015.7168571","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 IEEE International Symposium on Circuits and Systems (ISCAS)","raw_type":"proceedings-article"},"type":"conference-paper","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/A5000172050","display_name":"Yumeng Gao","orcid":"https://orcid.org/0000-0002-2718-0684"},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Yumeng Gao","raw_affiliation_strings":["School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore","School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore","institution_ids":["https://openalex.org/I172675005"]},{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5049506273","display_name":"Zhiping Lin","orcid":"https://orcid.org/0000-0002-1587-1226"},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Zhiping Lin","raw_affiliation_strings":["School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore, SG","School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, Singapore, SG","institution_ids":["https://openalex.org/I172675005"]},{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5087003724","display_name":"Tong Tong Zhang","orcid":null},"institutions":[{"id":"https://openalex.org/I2251586001","display_name":"Singapore General Hospital","ror":"https://ror.org/036j6sg82","country_code":"SG","type":"healthcare","lineage":["https://openalex.org/I2251586001"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Tong Tong Zhang","raw_affiliation_strings":["Department of Emergency Medicine, Singapore","Department of Emergency Medicine, Singapore General Hospital, Singapore 169608"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Emergency Medicine, Singapore","institution_ids":[]},{"raw_affiliation_string":"Department of Emergency Medicine, Singapore General Hospital, Singapore 169608","institution_ids":["https://openalex.org/I2251586001"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5100367554","display_name":"Nan Liu","orcid":"https://orcid.org/0000-0003-3610-4883"},"institutions":[{"id":"https://openalex.org/I2251586001","display_name":"Singapore General Hospital","ror":"https://ror.org/036j6sg82","country_code":"SG","type":"healthcare","lineage":["https://openalex.org/I2251586001"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Nan Liu","raw_affiliation_strings":["Department of Emergency Medicine, Singapore","Department of Emergency Medicine, Singapore General Hospital, Singapore 169608"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Emergency Medicine, Singapore","institution_ids":[]},{"raw_affiliation_string":"Department of Emergency Medicine, Singapore General Hospital, Singapore 169608","institution_ids":["https://openalex.org/I2251586001"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101486718","display_name":"Tianchi Liu","orcid":"https://orcid.org/0000-0001-6733-3924"},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Tianchi Liu","raw_affiliation_strings":["School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore","School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore","institution_ids":["https://openalex.org/I172675005"]},{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5113686034","display_name":"Wee Ser","orcid":null},"institutions":[{"id":"https://openalex.org/I172675005","display_name":"Nanyang Technological University","ror":"https://ror.org/02e7b5302","country_code":"SG","type":"education","lineage":["https://openalex.org/I172675005"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Wee Ser","raw_affiliation_strings":["School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore","School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore","institution_ids":["https://openalex.org/I172675005"]},{"raw_affiliation_string":"School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798,#TAB#","institution_ids":["https://openalex.org/I172675005"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5059452714","display_name":"Zhi Xiong Koh","orcid":"https://orcid.org/0000-0001-6440-1709"},"institutions":[{"id":"https://openalex.org/I2251586001","display_name":"Singapore General Hospital","ror":"https://ror.org/036j6sg82","country_code":"SG","type":"healthcare","lineage":["https://openalex.org/I2251586001"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Zhi Xiong Koh","raw_affiliation_strings":["Department of Emergency Medicine, Singapore General Hospital, Singapore","Department of Emergency Medicine, Singapore General Hospital, Singapore 169608"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Emergency Medicine, Singapore General Hospital, Singapore","institution_ids":["https://openalex.org/I2251586001"]},{"raw_affiliation_string":"Department of Emergency Medicine, Singapore General Hospital, Singapore 169608","institution_ids":["https://openalex.org/I2251586001"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5087685316","display_name":"Marcus Eng Hock Ong","orcid":"https://orcid.org/0000-0001-7874-7612"},"institutions":[{"id":"https://openalex.org/I2251586001","display_name":"Singapore General Hospital","ror":"https://ror.org/036j6sg82","country_code":"SG","type":"healthcare","lineage":["https://openalex.org/I2251586001"]}],"countries":["SG"],"is_corresponding":false,"raw_author_name":"Marcus Eng Hock Ong","raw_affiliation_strings":["Department of Emergency Medicine, Singapore General Hospital, Singapore, SG","Department of Emergency Medicine, Singapore General Hospital, Singapore 169608"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Emergency Medicine, Singapore General Hospital, Singapore, SG","institution_ids":["https://openalex.org/I2251586001"]},{"raw_affiliation_string":"Department of Emergency Medicine, Singapore General Hospital, Singapore 169608","institution_ids":["https://openalex.org/I2251586001"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":6,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"65","last_page":"68"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.9993000030517578,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},"topics":[{"id":"https://openalex.org/T10745","display_name":"Heart Rate Variability and Autonomic Control","score":0.9993000030517578,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}},{"id":"https://openalex.org/T11196","display_name":"Non-Invasive Vital Sign Monitoring","score":0.9976000189781189,"subfield":{"id":"https://openalex.org/subfields/2204","display_name":"Biomedical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11021","display_name":"ECG Monitoring and Analysis","score":0.9952999949455261,"subfield":{"id":"https://openalex.org/subfields/2705","display_name":"Cardiology and Cardiovascular Medicine"},"field":{"id":"https://openalex.org/fields/27","display_name":"Medicine"},"domain":{"id":"https://openalex.org/domains/4","display_name":"Health Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/approximate-entropy","display_name":"Approximate entropy","score":0.874761700630188},{"id":"https://openalex.org/keywords/sample-entropy","display_name":"Sample entropy","score":0.8522994518280029},{"id":"https://openalex.org/keywords/principal-component-analysis","display_name":"Principal component analysis","score":0.6211693286895752},{"id":"https://openalex.org/keywords/dimensionality-reduction","display_name":"Dimensionality reduction","score":0.6104606986045837},{"id":"https://openalex.org/keywords/pattern-recognition","display_name":"Pattern recognition (psychology)","score":0.5897105932235718},{"id":"https://openalex.org/keywords/entropy","display_name":"Entropy (arrow of time)","score":0.5561366081237793},{"id":"https://openalex.org/keywords/support-vector-machine","display_name":"Support vector machine","score":0.5387682914733887},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5334800481796265},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.5027501583099365},{"id":"https://openalex.org/keywords/nonlinear-system","display_name":"Nonlinear system","score":0.43101391196250916},{"id":"https://openalex.org/keywords/electrocardiography","display_name":"Electrocardiography","score":0.41032010316848755},{"id":"https://openalex.org/keywords/cardiology","display_name":"Cardiology","score":0.24380680918693542},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.12262380123138428},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.08765968680381775}],"concepts":[{"id":"https://openalex.org/C86859247","wikidata":"https://www.wikidata.org/wiki/Q4781760","display_name":"Approximate entropy","level":3,"score":0.874761700630188},{"id":"https://openalex.org/C66696666","wikidata":"https://www.wikidata.org/wiki/Q17105612","display_name":"Sample entropy","level":3,"score":0.8522994518280029},{"id":"https://openalex.org/C27438332","wikidata":"https://www.wikidata.org/wiki/Q2873","display_name":"Principal component analysis","level":2,"score":0.6211693286895752},{"id":"https://openalex.org/C70518039","wikidata":"https://www.wikidata.org/wiki/Q16000077","display_name":"Dimensionality reduction","level":2,"score":0.6104606986045837},{"id":"https://openalex.org/C153180895","wikidata":"https://www.wikidata.org/wiki/Q7148389","display_name":"Pattern recognition (psychology)","level":2,"score":0.5897105932235718},{"id":"https://openalex.org/C106301342","wikidata":"https://www.wikidata.org/wiki/Q4117933","display_name":"Entropy (arrow of time)","level":2,"score":0.5561366081237793},{"id":"https://openalex.org/C12267149","wikidata":"https://www.wikidata.org/wiki/Q282453","display_name":"Support vector machine","level":2,"score":0.5387682914733887},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5334800481796265},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.5027501583099365},{"id":"https://openalex.org/C158622935","wikidata":"https://www.wikidata.org/wiki/Q660848","display_name":"Nonlinear system","level":2,"score":0.43101391196250916},{"id":"https://openalex.org/C2780040984","wikidata":"https://www.wikidata.org/wiki/Q79785","display_name":"Electrocardiography","level":2,"score":0.41032010316848755},{"id":"https://openalex.org/C164705383","wikidata":"https://www.wikidata.org/wiki/Q10379","display_name":"Cardiology","level":1,"score":0.24380680918693542},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.12262380123138428},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.08765968680381775},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1109/iscas.2015.7168571","is_oa":false,"landing_page_url":"https://doi.org/10.1109/iscas.2015.7168571","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"2015 IEEE International Symposium on Circuits and Systems (ISCAS)","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":19,"referenced_works":["https://openalex.org/W120395821","https://openalex.org/W1506806321","https://openalex.org/W1862394037","https://openalex.org/W2019451125","https://openalex.org/W2077204677","https://openalex.org/W2104960492","https://openalex.org/W2108270639","https://openalex.org/W2113723055","https://openalex.org/W2116507356","https://openalex.org/W2129374946","https://openalex.org/W2130999320","https://openalex.org/W2133589238","https://openalex.org/W2139212933","https://openalex.org/W2143053797","https://openalex.org/W2155116952","https://openalex.org/W2262009215","https://openalex.org/W2285072859","https://openalex.org/W6604889410","https://openalex.org/W6679269391"],"related_works":["https://openalex.org/W2093589470","https://openalex.org/W2415751681","https://openalex.org/W2889925888","https://openalex.org/W1862394037","https://openalex.org/W3121271574","https://openalex.org/W2579148721","https://openalex.org/W2084594947","https://openalex.org/W4205160129","https://openalex.org/W2890995276","https://openalex.org/W4381804751"],"abstract_inverted_index":{"Sixteen":[0],"conventional":[1],"heart":[2,56],"beat":[3],"variability":[4],"(HRV)":[5],"parameters":[6,52,101,133,142],"and":[7,42,47,66,128],"eight":[8],"vital":[9],"signs":[10],"have":[11],"shown":[12],"promise":[13],"in":[14],"the":[15,69,92,117,122,131,140,152],"prediction":[16,123,153],"of":[17,54,94,125],"cardiac":[18,34,103],"arrest":[19,35,104],"within":[20],"72":[21],"hours.":[22],"Besides":[23],"these":[24],"24":[25,71,100,132,141],"parameters,":[26],"we":[27],"proposed":[28],"adding":[29,126],"two":[30,59],"new":[31],"features":[32,72],"for":[33],"prediction,":[36],"which":[37],"are":[38,49],"approximate":[39],"entropy":[40,44],"(ApEn)":[41],"sample":[43],"(SpEn).":[45],"ApEn":[46,127],"SpEn":[48,97,129],"nonlinear":[50],"HRV":[51],"capable":[53],"characterizing":[55],"conditions.":[57],"These":[58],"entropies":[60],"were":[61,79],"derived":[62],"from":[63],"electrocardiography":[64],"recordings":[65],"combined":[67],"with":[68,99],"existing":[70],"to":[73,90,115,130,138],"form":[74],"feature":[75],"combinations.":[76],"The":[77,106],"experiments":[78],"conducted":[80],"by":[81],"using":[82,95,139],"linear":[83],"kernel":[84],"Support":[85],"Vector":[86],"Machine":[87],"classification":[88],"technique":[89],"investigate":[91],"effects":[93,149],"ApEn,":[96],"together":[98],"on":[102,150],"prediction.":[105],"dimensionality":[107],"reduction":[108,145],"approach,":[109],"Principal":[110],"Component":[111],"Analysis,":[112],"was":[113],"applied":[114],"suppress":[116],"dimensionality.":[118],"Results":[119],"reveal":[120],"that":[121],"performance":[124],"is":[134],"improved":[135],"significantly":[136],"compared":[137],"only.":[143],"Dimension":[144],"has":[146],"additional":[147],"positive":[148],"improving":[151],"results.":[154]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2022,"cited_by_count":1},{"year":2018,"cited_by_count":4}],"updated_date":"2026-07-14T23:27:15.235271","created_date":"2025-10-10T00:00:00"}