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Article: A Novel Interpolation-SVT Approach for Recovering Missing Low-Rank Air Quality Data

TitleA Novel Interpolation-SVT Approach for Recovering Missing Low-Rank Air Quality Data
Authors
KeywordsAir pollution
Pollution measurement
Atmospheric measurements
Interpolation
Monitoring
Issue Date2020
PublisherInstitute of Electrical and Electronics Engineers (IEEE): OAJ. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6287639
Citation
IEEE Access, 2020, v. 8, p. 74291-74305 How to Cite?
AbstractWith increasing public demands for timely and accurate air pollution reporting, more air quality monitoring stations have been deployed by the governments in urban metropolises to increase the coverage of urban air pollution monitoring. However, due to systematic or accidental failures, some air pollution measurements obtained from these stations are found to have missing values, which will adversely affect the accuracy of any follow-up air pollution analyses and the quality of environmental decision-makings. In this study, the mathematical property of air quality measurements is investigated to recover the missing air pollution values. A new algorithm, which matches meteorology data with air pollution data from different locations, to reconstruct the data matrix and recover missing entries, is proposed. Next, a Low Rank Matrix Completion problem is used to reconstruct the missing values, by transforming the data recovery problem to a sub-gradient primal-dual problem, based on the duality theory, with Singular Value Thresholding (SVT) employed to develop sub-optimal solutions. Next, an Interpolation-SVT (ISVT) approach is adopted to handle the sparsity of observed measurements. Comprehensive case studies are conducted to evaluate the performance of the proposed methods. The simulation results have demonstrated that the proposed SVT and ISVT methods can effectively recover the missing air pollution data and outperform existing interpolation methods and data imputation techniques. The proposed study can improve air pollution estimation and prediction whenever the low-rank data types that are used as proxies for air pollution estimation contain a lot of missing values and require data recovery.
Persistent Identifierhttp://hdl.handle.net/10722/287653
ISSN
2019 Impact Factor: 3.745
2015 SCImago Journal Rankings: 0.947

 

DC FieldValueLanguage
dc.contributor.authorYU, Y-
dc.contributor.authorYU, JJQ-
dc.contributor.authorLi, VOK-
dc.contributor.authorLam, JCK-
dc.date.accessioned2020-10-05T12:01:16Z-
dc.date.available2020-10-05T12:01:16Z-
dc.date.issued2020-
dc.identifier.citationIEEE Access, 2020, v. 8, p. 74291-74305-
dc.identifier.issn2169-3536-
dc.identifier.urihttp://hdl.handle.net/10722/287653-
dc.description.abstractWith increasing public demands for timely and accurate air pollution reporting, more air quality monitoring stations have been deployed by the governments in urban metropolises to increase the coverage of urban air pollution monitoring. However, due to systematic or accidental failures, some air pollution measurements obtained from these stations are found to have missing values, which will adversely affect the accuracy of any follow-up air pollution analyses and the quality of environmental decision-makings. In this study, the mathematical property of air quality measurements is investigated to recover the missing air pollution values. A new algorithm, which matches meteorology data with air pollution data from different locations, to reconstruct the data matrix and recover missing entries, is proposed. Next, a Low Rank Matrix Completion problem is used to reconstruct the missing values, by transforming the data recovery problem to a sub-gradient primal-dual problem, based on the duality theory, with Singular Value Thresholding (SVT) employed to develop sub-optimal solutions. Next, an Interpolation-SVT (ISVT) approach is adopted to handle the sparsity of observed measurements. Comprehensive case studies are conducted to evaluate the performance of the proposed methods. The simulation results have demonstrated that the proposed SVT and ISVT methods can effectively recover the missing air pollution data and outperform existing interpolation methods and data imputation techniques. The proposed study can improve air pollution estimation and prediction whenever the low-rank data types that are used as proxies for air pollution estimation contain a lot of missing values and require data recovery.-
dc.languageeng-
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE): OAJ. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6287639-
dc.relation.ispartofIEEE Access-
dc.rightsIEEE Access. Copyright © Institute of Electrical and Electronics Engineers (IEEE): OAJ.-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectAir pollution-
dc.subjectPollution measurement-
dc.subjectAtmospheric measurements-
dc.subjectInterpolation-
dc.subjectMonitoring-
dc.titleA Novel Interpolation-SVT Approach for Recovering Missing Low-Rank Air Quality Data-
dc.typeArticle-
dc.identifier.emailLi, VOK: vli@eee.hku.hk-
dc.identifier.emailLam, JCK: h9992013@hkucc.hku.hk-
dc.identifier.authorityLi, VOK=rp00150-
dc.identifier.authorityLam, JCK=rp00864-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1109/ACCESS.2020.2988684-
dc.identifier.scopuseid_2-s2.0-85084331542-
dc.identifier.hkuros315114-
dc.identifier.volume8-
dc.identifier.spage74291-
dc.identifier.epage74305-
dc.publisher.placeUnited States-

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