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Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images

The development of satellite sensors and interferometry synthetic aperture radar (InSAR) technology has enabled the exploitation of their benefits for long-term structural health monitoring (SHM). However, some restrictions cause this process to provide a small number of images leading to the proble...

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Autores principales: Entezami, Alireza, De Michele, Carlo, Arslan, Ali Nadir, Behkamal, Bahareh
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269802/
https://www.ncbi.nlm.nih.gov/pubmed/35808455
http://dx.doi.org/10.3390/s22134964
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author Entezami, Alireza
De Michele, Carlo
Arslan, Ali Nadir
Behkamal, Bahareh
author_facet Entezami, Alireza
De Michele, Carlo
Arslan, Ali Nadir
Behkamal, Bahareh
author_sort Entezami, Alireza
collection PubMed
description The development of satellite sensors and interferometry synthetic aperture radar (InSAR) technology has enabled the exploitation of their benefits for long-term structural health monitoring (SHM). However, some restrictions cause this process to provide a small number of images leading to the problem of small data for SAR-based SHM. Conversely, the major challenge of the long-term monitoring of civil structures pertains to variations in their inherent properties by environmental and/or operational variability. This article aims to propose new hybrid unsupervised learning methods for addressing these challenges. The methods in this work contain three main parts: (i) data augmentation by the Markov Chain Monte Carlo algorithm, (ii) feature normalization, and (iii) decision making via Mahalanobis-squared distance. The first method presented in this work develops an artificial neural network-based feature normalization by proposing an iterative hyperparameter selection of hidden neurons of the network. The second method is a novel unsupervised teacher–student learning by combining an undercomplete deep neural network and an overcomplete single-layer neural network. A small set of long-term displacement samples extracted from a few SAR images of TerraSAR-X is applied to validate the proposed methods. The results show that the methods can effectively deal with the major challenges in the SAR-based SHM applications.
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spelling pubmed-92698022022-07-09 Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images Entezami, Alireza De Michele, Carlo Arslan, Ali Nadir Behkamal, Bahareh Sensors (Basel) Article The development of satellite sensors and interferometry synthetic aperture radar (InSAR) technology has enabled the exploitation of their benefits for long-term structural health monitoring (SHM). However, some restrictions cause this process to provide a small number of images leading to the problem of small data for SAR-based SHM. Conversely, the major challenge of the long-term monitoring of civil structures pertains to variations in their inherent properties by environmental and/or operational variability. This article aims to propose new hybrid unsupervised learning methods for addressing these challenges. The methods in this work contain three main parts: (i) data augmentation by the Markov Chain Monte Carlo algorithm, (ii) feature normalization, and (iii) decision making via Mahalanobis-squared distance. The first method presented in this work develops an artificial neural network-based feature normalization by proposing an iterative hyperparameter selection of hidden neurons of the network. The second method is a novel unsupervised teacher–student learning by combining an undercomplete deep neural network and an overcomplete single-layer neural network. A small set of long-term displacement samples extracted from a few SAR images of TerraSAR-X is applied to validate the proposed methods. The results show that the methods can effectively deal with the major challenges in the SAR-based SHM applications. MDPI 2022-06-30 /pmc/articles/PMC9269802/ /pubmed/35808455 http://dx.doi.org/10.3390/s22134964 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Entezami, Alireza
De Michele, Carlo
Arslan, Ali Nadir
Behkamal, Bahareh
Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images
title Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images
title_full Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images
title_fullStr Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images
title_full_unstemmed Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images
title_short Detection of Partially Structural Collapse Using Long-Term Small Displacement Data from Satellite Images
title_sort detection of partially structural collapse using long-term small displacement data from satellite images
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269802/
https://www.ncbi.nlm.nih.gov/pubmed/35808455
http://dx.doi.org/10.3390/s22134964
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