Contribution of Singular Spectral Analysis to Forecasting and Anomalies Detection of Indoors Air Quality

• Main Authors: Bartolomé, A.B (Author), Espinosa, F. (Author), Hernández, P.V (Author), Rodriguez‐sanchez, M.C (Author)
• Format: Article
• Language: English
• Published: MDPI 2022
• Subjects: Air quality; air quality monitoring; Air quality monitoring; anomalies detection; Anomaly detection; forecasting; Forecasting; High impact; Indoor air pollution; Indoor air quality; Quality control; Singular spectral analyse; Singular Spectral Analysis; Spectrum analysis; Time derivative; Time series; Time series analysis; time series modelling; Times series; Times series models; Tree-partition; Treepartition modeling; treepartition modelling
• Online Access: View Fulltext in Publisher

 The high impact of air quality on environmental and human health justifies the increasing research activity regarding its measurement, modelling, forecasting and anomaly detection. Raw data offered by sensors usually makes the mentioned time series disciplines difficult. This is why the application of techniques to improve time series processing is a challenge. In this work, Singular Spectral Analysis (SSA) is applied to air quality analysis from real recorded data as part of the Help Responder research project. Authors evaluate the benefits of working with SSA processed data instead of raw data for modelling and estimation of the resulting time series. However, what is more relevant is the proposal to detect indoor air quality anomalies based on the analysis of the time derivative SSA signal when the time derivative of the noisy original data is useless. A dual methodology, evaluating level and dynamics of the SSA signal variation, contributes to identifying risk situations derived from air quality degradation. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.