{"id":"https://openalex.org/W2070330801","doi":"https://doi.org/10.1007/s11222-014-9485-x","title":"Fast covariance estimation for high-dimensional functional data","display_name":"Fast covariance estimation for high-dimensional functional data","publication_year":2014,"publication_date":"2014-06-25","ids":{"openalex":"https://openalex.org/W2070330801","doi":"https://doi.org/10.1007/s11222-014-9485-x","mag":"2070330801","pmid":"https://pubmed.ncbi.nlm.nih.gov/26903705"},"language":"en","primary_location":{"id":"doi:10.1007/s11222-014-9485-x","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s11222-014-9485-x","pdf_url":null,"source":{"id":"https://openalex.org/S5437875","display_name":"Statistics and Computing","issn_l":"0960-3174","issn":["0960-3174","1573-1375"],"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":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Statistics and Computing","raw_type":"journal-article"},"type":"article","indexed_in":["arxiv","crossref","pubmed"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/1306.5718","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5048612717","display_name":"Luo Xiao","orcid":"https://orcid.org/0000-0001-8707-0914"},"institutions":[{"id":"https://openalex.org/I145311948","display_name":"Johns Hopkins University","ror":"https://ror.org/00za53h95","country_code":"US","type":"education","lineage":["https://openalex.org/I145311948"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Luo Xiao","raw_affiliation_strings":["Department of Biostatistics, Johns Hopkins University, Baltimore, MD","Department of Biostatistics, Johns Hopkins University, Baltimore, USA;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Biostatistics, Johns Hopkins University, Baltimore, MD","institution_ids":["https://openalex.org/I145311948"]},{"raw_affiliation_string":"Department of Biostatistics, Johns Hopkins University, Baltimore, USA;","institution_ids":["https://openalex.org/I145311948"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012738138","display_name":"Vadim Zipunnikov","orcid":null},"institutions":[{"id":"https://openalex.org/I145311948","display_name":"Johns Hopkins University","ror":"https://ror.org/00za53h95","country_code":"US","type":"education","lineage":["https://openalex.org/I145311948"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Vadim Zipunnikov","raw_affiliation_strings":["Department of Biostatistics, Johns Hopkins University, Baltimore, MD","Department of Biostatistics, Johns Hopkins University, Baltimore, USA;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Biostatistics, Johns Hopkins University, Baltimore, MD","institution_ids":["https://openalex.org/I145311948"]},{"raw_affiliation_string":"Department of Biostatistics, Johns Hopkins University, Baltimore, USA;","institution_ids":["https://openalex.org/I145311948"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5061514978","display_name":"David Ruppert","orcid":"https://orcid.org/0000-0002-6713-2257"},"institutions":[{"id":"https://openalex.org/I145311948","display_name":"Johns Hopkins University","ror":"https://ror.org/00za53h95","country_code":"US","type":"education","lineage":["https://openalex.org/I145311948"]},{"id":"https://openalex.org/I205783295","display_name":"Cornell University","ror":"https://ror.org/05bnh6r87","country_code":"US","type":"education","lineage":["https://openalex.org/I205783295"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"David Ruppert","raw_affiliation_strings":["Department of Biostatistics, Johns Hopkins University, Baltimore, MD","\u00a0Department of Statistical Science and School of Operations Research and Information Engineering, Cornell University, Ithaca, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Biostatistics, Johns Hopkins University, Baltimore, MD","institution_ids":["https://openalex.org/I145311948"]},{"raw_affiliation_string":"\u00a0Department of Statistical Science and School of Operations Research and Information Engineering, Cornell University, Ithaca, USA","institution_ids":["https://openalex.org/I205783295"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5089030792","display_name":"Ciprian M. Crainiceanu","orcid":"https://orcid.org/0000-0001-6601-3881"},"institutions":[{"id":"https://openalex.org/I145311948","display_name":"Johns Hopkins University","ror":"https://ror.org/00za53h95","country_code":"US","type":"education","lineage":["https://openalex.org/I145311948"]},{"id":"https://openalex.org/I205783295","display_name":"Cornell University","ror":"https://ror.org/05bnh6r87","country_code":"US","type":"education","lineage":["https://openalex.org/I205783295"]},{"id":"https://openalex.org/I4210157790","display_name":"Statistical Research (United States)","ror":"https://ror.org/058eg8775","country_code":"US","type":"company","lineage":["https://openalex.org/I4210157790"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"Ciprian Crainiceanu","raw_affiliation_strings":["Department of Statistical Science and School of Operations Research and Information Engineering, Cornell University, Ithaca, NY","Department of Biostatistics, Johns Hopkins University, Baltimore, USA;"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Statistical Science and School of Operations Research and Information Engineering, Cornell University, Ithaca, NY","institution_ids":["https://openalex.org/I205783295","https://openalex.org/I4210157790"]},{"raw_affiliation_string":"Department of Biostatistics, Johns Hopkins University, Baltimore, USA;","institution_ids":["https://openalex.org/I145311948"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":["https://openalex.org/A5048612717"],"corresponding_institution_ids":["https://openalex.org/I145311948"],"apc_list":{"value":2690,"currency":"USD","value_usd":2690},"apc_paid":null,"fwci":4.2909,"has_fulltext":false,"cited_by_count":102,"citation_normalized_percentile":{"value":0.94724192,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":89,"max":100},"biblio":{"volume":"26","issue":"1-2","first_page":"409","last_page":"421"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10136","display_name":"Statistical Methods and Inference","score":0.9987999796867371,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10136","display_name":"Statistical Methods and Inference","score":0.9987999796867371,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10243","display_name":"Statistical Methods and Bayesian Inference","score":0.9940999746322632,"subfield":{"id":"https://openalex.org/subfields/2613","display_name":"Statistics and Probability"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13487","display_name":"Statistical and numerical algorithms","score":0.98089998960495,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/smoothing","display_name":"Smoothing","score":0.8831638097763062},{"id":"https://openalex.org/keywords/covariance","display_name":"Covariance","score":0.749885082244873},{"id":"https://openalex.org/keywords/singular-value-decomposition","display_name":"Singular value decomposition","score":0.6170816421508789},{"id":"https://openalex.org/keywords/covariance-function","display_name":"Covariance function","score":0.6170793771743774},{"id":"https://openalex.org/keywords/covariance-matrix","display_name":"Covariance matrix","score":0.5490097403526306},{"id":"https://openalex.org/keywords/algorithm","display_name":"Algorithm","score":0.5204334855079651},{"id":"https://openalex.org/keywords/dimension","display_name":"Dimension (graph theory)","score":0.5184702277183533},{"id":"https://openalex.org/keywords/software","display_name":"Software","score":0.5179771184921265},{"id":"https://openalex.org/keywords/estimation-of-covariance-matrices","display_name":"Estimation of covariance matrices","score":0.5055744647979736},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.5036551356315613},{"id":"https://openalex.org/keywords/eigenvalues-and-eigenvectors","display_name":"Eigenvalues and eigenvectors","score":0.46961623430252075},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.4137195646762848},{"id":"https://openalex.org/keywords/mathematical-optimization","display_name":"Mathematical optimization","score":0.35708922147750854},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.15159747004508972}],"concepts":[{"id":"https://openalex.org/C3770464","wikidata":"https://www.wikidata.org/wiki/Q775963","display_name":"Smoothing","level":2,"score":0.8831638097763062},{"id":"https://openalex.org/C178650346","wikidata":"https://www.wikidata.org/wiki/Q201984","display_name":"Covariance","level":2,"score":0.749885082244873},{"id":"https://openalex.org/C22789450","wikidata":"https://www.wikidata.org/wiki/Q420904","display_name":"Singular value decomposition","level":2,"score":0.6170816421508789},{"id":"https://openalex.org/C137250428","wikidata":"https://www.wikidata.org/wiki/Q5178897","display_name":"Covariance function","level":3,"score":0.6170793771743774},{"id":"https://openalex.org/C185142706","wikidata":"https://www.wikidata.org/wiki/Q1134404","display_name":"Covariance matrix","level":2,"score":0.5490097403526306},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5204334855079651},{"id":"https://openalex.org/C33676613","wikidata":"https://www.wikidata.org/wiki/Q13415176","display_name":"Dimension (graph theory)","level":2,"score":0.5184702277183533},{"id":"https://openalex.org/C2777904410","wikidata":"https://www.wikidata.org/wiki/Q7397","display_name":"Software","level":2,"score":0.5179771184921265},{"id":"https://openalex.org/C180877172","wikidata":"https://www.wikidata.org/wiki/Q5401390","display_name":"Estimation of covariance matrices","level":3,"score":0.5055744647979736},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.5036551356315613},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.46961623430252075},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.4137195646762848},{"id":"https://openalex.org/C126255220","wikidata":"https://www.wikidata.org/wiki/Q141495","display_name":"Mathematical optimization","level":1,"score":0.35708922147750854},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.15159747004508972},{"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/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C202444582","wikidata":"https://www.wikidata.org/wiki/Q837863","display_name":"Pure mathematics","level":1,"score":0.0}],"mesh":[],"locations_count":7,"locations":[{"id":"doi:10.1007/s11222-014-9485-x","is_oa":false,"landing_page_url":"https://doi.org/10.1007/s11222-014-9485-x","pdf_url":null,"source":{"id":"https://openalex.org/S5437875","display_name":"Statistics and Computing","issn_l":"0960-3174","issn":["0960-3174","1573-1375"],"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":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Statistics and Computing","raw_type":"journal-article"},{"id":"pmid:26903705","is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/26903705","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Statistics and computing","raw_type":null},{"id":"pmh:oai:arXiv.org:1306.5718","is_oa":true,"landing_page_url":"http://arxiv.org/abs/1306.5718","pdf_url":"https://arxiv.org/pdf/1306.5718","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"pmh:oai:europepmc.org:4103350","is_oa":false,"landing_page_url":"https://www.ncbi.nlm.nih.gov/pmc/articles/4758990","pdf_url":null,"source":{"id":"https://openalex.org/S4306400806","display_name":"Europe PMC (PubMed Central)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I1303153112","host_organization_name":"European Bioinformatics Institute","host_organization_lineage":["https://openalex.org/I1303153112"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.697.9030","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.697.9030","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://people.orie.cornell.edu/davidr/papers/face.pdf","raw_type":"text"},{"id":"pmh:oai:CiteSeerX.psu:10.1.1.766.9602","is_oa":false,"landing_page_url":"http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.766.9602","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"http://arxiv.org/pdf/1306.5718.pdf","raw_type":"text"},{"id":"pmh:oai:biostats.bepress.com:jhubiostat-1254","is_oa":false,"landing_page_url":"https://biostats.bepress.com/jhubiostat/paper249","pdf_url":null,"source":{"id":"https://openalex.org/S4377196124","display_name":"Collection of Biostatistics Research Archive","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Johns Hopkins University, Dept. of Biostatistics Working Papers","raw_type":"text"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:1306.5718","is_oa":true,"landing_page_url":"http://arxiv.org/abs/1306.5718","pdf_url":"https://arxiv.org/pdf/1306.5718","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"awards":[{"id":"https://openalex.org/G3090714985","display_name":null,"funder_award_id":"R01 NS060910","funder_id":"https://openalex.org/F4320337359","funder_display_name":"National Institute of Neurological Disorders and Stroke"},{"id":"https://openalex.org/G3545918724","display_name":null,"funder_award_id":"R01 EB012547","funder_id":"https://openalex.org/F4320337363","funder_display_name":"National Institute of Biomedical Imaging and Bioengineering"}],"funders":[{"id":"https://openalex.org/F4320337359","display_name":"National Institute of Neurological Disorders and Stroke","ror":"https://ror.org/01s5ya894"},{"id":"https://openalex.org/F4320337363","display_name":"National Institute of Biomedical Imaging and Bioengineering","ror":"https://ror.org/00372qc85"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":60,"referenced_works":["https://openalex.org/W98797825","https://openalex.org/W161334779","https://openalex.org/W163215356","https://openalex.org/W206706296","https://openalex.org/W610284107","https://openalex.org/W612421432","https://openalex.org/W1423766661","https://openalex.org/W1521342285","https://openalex.org/W1576898078","https://openalex.org/W1893329038","https://openalex.org/W1966252828","https://openalex.org/W1970646187","https://openalex.org/W1982959792","https://openalex.org/W1983960282","https://openalex.org/W1986670423","https://openalex.org/W1990420052","https://openalex.org/W1995405579","https://openalex.org/W1998577249","https://openalex.org/W1999142863","https://openalex.org/W2003524333","https://openalex.org/W2011970434","https://openalex.org/W2026118200","https://openalex.org/W2027106381","https://openalex.org/W2027505483","https://openalex.org/W2027515083","https://openalex.org/W2027680244","https://openalex.org/W2029220640","https://openalex.org/W2038151662","https://openalex.org/W2040669081","https://openalex.org/W2056362049","https://openalex.org/W2058140676","https://openalex.org/W2089785797","https://openalex.org/W2115991079","https://openalex.org/W2119753634","https://openalex.org/W2121972618","https://openalex.org/W2122604185","https://openalex.org/W2140170995","https://openalex.org/W2140308441","https://openalex.org/W2140819685","https://openalex.org/W2144148350","https://openalex.org/W2147349265","https://openalex.org/W2153675946","https://openalex.org/W2169886352","https://openalex.org/W2269263220","https://openalex.org/W2949445324","https://openalex.org/W2949537047","https://openalex.org/W3000332379","https://openalex.org/W3021971632","https://openalex.org/W3101791986","https://openalex.org/W3103653611","https://openalex.org/W3105257613","https://openalex.org/W3123938811","https://openalex.org/W4205462863","https://openalex.org/W4205685297","https://openalex.org/W4238124278","https://openalex.org/W4242746719","https://openalex.org/W4244637328","https://openalex.org/W4254345832","https://openalex.org/W4292156489","https://openalex.org/W4308789267"],"related_works":["https://openalex.org/W1991005374","https://openalex.org/W2022823194","https://openalex.org/W2050026105","https://openalex.org/W2126916073","https://openalex.org/W2887132723","https://openalex.org/W2921280830","https://openalex.org/W2756533552","https://openalex.org/W4291433997","https://openalex.org/W1539641106","https://openalex.org/W2901862782"],"abstract_inverted_index":null,"counts_by_year":[{"year":2026,"cited_by_count":11},{"year":2025,"cited_by_count":10},{"year":2024,"cited_by_count":11},{"year":2023,"cited_by_count":4},{"year":2022,"cited_by_count":9},{"year":2021,"cited_by_count":12},{"year":2020,"cited_by_count":11},{"year":2019,"cited_by_count":10},{"year":2018,"cited_by_count":9},{"year":2017,"cited_by_count":7},{"year":2016,"cited_by_count":2},{"year":2015,"cited_by_count":2},{"year":2014,"cited_by_count":3},{"year":2013,"cited_by_count":1}],"updated_date":"2026-08-11T07:18:39.950985","created_date":"2025-10-10T00:00:00"}