PARAMETER ESTIMATION OF GUIDED-WAVE REFLECTION SIGNAL FOR QUANTITATIVE CHARACTERIZATION OF DEFECT IN PIPELINE

2010 ◽  
Author(s):  
Xiaojuan Wang ◽  
Peter W. Tse ◽  
Donald O. Thompson ◽  
Dale E. Chimenti
Keyword(s):  
Parameter Estimation ◽  
Wave Reflection ◽  
Guided Wave ◽  
Quantitative Characterization

Subwavelength Defect Characterization Using Guided Wave Scattering Matrix

2013 ◽  
Vol 330 ◽  
pp. 504-509
Author(s):  
Yang Zheng ◽  
Jin Jie Zhou ◽  
Hui Zheng
Keyword(s):  
Wave Scattering ◽  
Scattering Matrix ◽  
Guided Wave ◽  
Defect Characterization ◽  
Challenging Problem ◽  
Recognition Method ◽  
Quantitative Characterization ◽  
S Matrix ◽  
Imaging Algorithms

Although many imaging algorithms such as ellipse and hyperbola algorithm can roughly locate defects in large plate-like structures with sparse guided wave arrays, quantitative characterization of them is still a challenging problem, especially for those small defects known as subwavelength defects. Scattering signals of defects contain abundant information so that can be used to evaluate defects. A defects recognition method using the S-matrix (scattering matrix) was presented. S-matrices of hole and crack with S0 mode incident were experimentally measured. The results show that defects can be recognized from the morphology of 2D S-matrix chart. This method has great potential to achieve more specific parameters of small defects with sparse guided wave arrays.

Quantitative characterization of O-GalNAc glycosylation

2021 ◽  
Vol 68 ◽  
pp. 135-141
Author(s):  
Tomislav Čaval ◽  
Noortje de Haan ◽  
Andriana Konstantinidi ◽  
Sergey Y Vakhrushev
Keyword(s):  
Quantitative Characterization
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