Citation notice #60 · 2026-07-11 03:18:47.924832+00:00

Operator-Theoretic Energy Functionals for Impulse-Excited Nonstationary Signal Analysis

cites Instantaneous frequency identification for nonstationary signals of time-varying structures using enhanced synchroextracting wavelet transform and dynamic optimiza- tion,, which carries a retraction notice dated 2025-12-18. One-hop deterministic notice: the citation edge exists in the Pith bibliography graph; no model judged whether the citation was load-bearing.

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01Evidence

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basis for energy-driven defect detection in structural monitoring applications. Index Terms-Defect detection, Energy functional, Fault diag- nosis, Operator theory, Spectral analysis, Time-frequency analysis, Wavelet transform. I. INTRODUCTION Impulse-excited engineering systems constitute a broad class of physical structures in which transient responses reveal intrinsic dynamic characteristics [1], [2]. When a system is subjected to short-duration excitation, the measured response reflects structural parameters such as damping, stiffness, res- onance frequencies, or electromechanical coupling properties [4]. Variations in these parameters may arise from material degradation, structural defects, thermal stress, fatigue, or electrical instability [5], [6].

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basis for energy-driven defect detection in structural monitoring applications. Index Terms-Defect detection, Energy functional, Fault diag- nosis, Operator theory, Spectral analysis, Time-frequency analysis, Wavelet transform. I. INTRODUCTION Impulse-excited engineering systems constitute a broad class of physical structures in which transient responses reveal intrinsic dynamic characteristics [1], [2]. When a system is subjected to short-duration excitation, the measured response reflects structural parameters such as damping, stiffness, res- onance frequencies, or electromechanical coupling properties [4]. Variations in these parameters may arise from material degradation, structural defects, thermal stress, fatigue, or electrical instability [5], [6]

02Event

Type

Retraction

Source

Crossref

Original DOI

10.1177/14613484241233392

Notice DOI

10.1177/14613484251401366

Date

2025-12-18

Title

Retraction: Instantaneous frequency identification for nonstationary signals of time-varying structures using enhanced synchroextracting wavelet transform and dynamic optimization

Reasons

['Retraction']

Work

Instantaneous frequency identification for nonstationary signals of time-varying structures using enhanced synchroextracting wavelet transform and dynamic optimiza- tion, (2024)

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