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Book Chapter: Data quality evaluation, outlier detection and missing data imputation methods for IoT in smart cities
Title | Data quality evaluation, outlier detection and missing data imputation methods for IoT in smart cities |
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Authors | |
Keywords | Data quality Outlier detection Missing data imputation Air quality Smart city |
Issue Date | 2021 |
Publisher | Springer |
Citation | Data quality evaluation, outlier detection and missing data imputation methods for IoT in smart cities. In Ghosh, U ... et al (Eds.), Machine Intelligence and Data Analytics for Sustainable Future Smart Cities, p. 1-18. Cham: Springer, 2021 How to Cite? |
Abstract | Low-cost IoT devices allow data collection in smart cities at a high spatio-temporal resolution. Data quality evaluation is needed to investigate the pre-processing steps required to use these data. Besides data pre-processing, outlier detection techniques are required to detect anomalies in the spatio-temporal IoT dataset. We distinguish between erroneous outliers and events based on spatio-temporal autocorrelation patterns, as well as correlations with other dynamic processes in the environment. We consider missing data imputation to fill gaps caused by sensor failures, maintenance, pre-processing and outlier detection. In this study, we use the temporal covariance structure within the data to impute missing data. We apply the methods for outlier detection and missing data imputation to an IoT testbed for air quality monitoring in the city of Eindhoven, the Netherlands. The methods can be applied in a more general sense to other continuous environmental variables which show a similarly strong spatio-temporal autocorrelation structure. |
Persistent Identifier | http://hdl.handle.net/10722/312710 |
ISBN | |
Series/Report no. | Studies in Computational Intelligence (SCI) ; v. 971 |
DC Field | Value | Language |
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dc.contributor.author | van Zoest, V | - |
dc.contributor.author | Liu, X | - |
dc.contributor.author | Ngai, CHE | - |
dc.date.accessioned | 2022-05-12T10:54:31Z | - |
dc.date.available | 2022-05-12T10:54:31Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Data quality evaluation, outlier detection and missing data imputation methods for IoT in smart cities. In Ghosh, U ... et al (Eds.), Machine Intelligence and Data Analytics for Sustainable Future Smart Cities, p. 1-18. Cham: Springer, 2021 | - |
dc.identifier.isbn | 9783030720643 | - |
dc.identifier.uri | http://hdl.handle.net/10722/312710 | - |
dc.description.abstract | Low-cost IoT devices allow data collection in smart cities at a high spatio-temporal resolution. Data quality evaluation is needed to investigate the pre-processing steps required to use these data. Besides data pre-processing, outlier detection techniques are required to detect anomalies in the spatio-temporal IoT dataset. We distinguish between erroneous outliers and events based on spatio-temporal autocorrelation patterns, as well as correlations with other dynamic processes in the environment. We consider missing data imputation to fill gaps caused by sensor failures, maintenance, pre-processing and outlier detection. In this study, we use the temporal covariance structure within the data to impute missing data. We apply the methods for outlier detection and missing data imputation to an IoT testbed for air quality monitoring in the city of Eindhoven, the Netherlands. The methods can be applied in a more general sense to other continuous environmental variables which show a similarly strong spatio-temporal autocorrelation structure. | - |
dc.language | eng | - |
dc.publisher | Springer | - |
dc.relation.ispartof | Machine Intelligence and Data Analytics for Sustainable Future Smart Cities | - |
dc.relation.ispartofseries | Studies in Computational Intelligence (SCI) ; v. 971 | - |
dc.subject | Data quality | - |
dc.subject | Outlier detection | - |
dc.subject | Missing data imputation | - |
dc.subject | Air quality | - |
dc.subject | Smart city | - |
dc.title | Data quality evaluation, outlier detection and missing data imputation methods for IoT in smart cities | - |
dc.type | Book_Chapter | - |
dc.identifier.email | Ngai, CHE: chngai@eee.hku.hk | - |
dc.identifier.authority | Ngai, CHE=rp02656 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1007/978-3-030-72065-0_1 | - |
dc.identifier.hkuros | 333061 | - |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 18 | - |
dc.publisher.place | Cham | - |