2023
DOI: 10.3390/coatings13071294
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Multi-Scale Analysis of Terahertz Time-Domain Spectroscopy for Inversion of Thermal Growth Oxide Thickness in Thermal Barrier Coatings

Abstract: To address the inverse problem of thermal growth oxide (TGO) thickness in thermal barrier coatings (TBCs), a novel multi-scale analysis (MSA) method based on terahertz time-domain spectroscopy (THz-TDS) is introduced. The proposed method involves a MSA technique based on four wavelet basis functions (db4, sym3, haar, coif3). Informative feature parameters characterizing the TGO thickness were extracted by performing continuous wavelet transform (CWT) and max-pooling operations on representative wavelet coeffic… Show more

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Cited by 2 publications
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“…Additionally, methods based on machine learning and image processing have been applied to assess the quality of thermal barrier coatings. Li et al [35,36] conducted analysis and processing of terahertz time-domain data using data-driven models and machine learning algorithms, facilitating feature extraction and classification for the evaluation of TBCs. This represented a major leap forward in combining machine learning with signal processing.…”
Section: Introductionmentioning
confidence: 99%
“…Additionally, methods based on machine learning and image processing have been applied to assess the quality of thermal barrier coatings. Li et al [35,36] conducted analysis and processing of terahertz time-domain data using data-driven models and machine learning algorithms, facilitating feature extraction and classification for the evaluation of TBCs. This represented a major leap forward in combining machine learning with signal processing.…”
Section: Introductionmentioning
confidence: 99%