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A Study on Instantaneous Time-Frequency Methods for Damage Detection of Nonlinear Moment-Resisting Frames
Published 2014-01-01“…A probabilistic approach is implemented to investigate capability of the procedure for different ground motion records using incremental dynamic analysis. Results show that frequency is not an appropriate feature to detect damage in nonlinear structures.…”
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An Optimally Oriented Coherence Attribute Method and Its Application to Faults and Fracture Sets Detection in Carbonate Reservoirs
Published 2025-07-01Subjects: Get full text
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Sensitivity of Dynamic Methods for Damage Detection in Structural Concrete Bridges
Published 2004-01-01Get full text
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Clinical and epidemiological characteristics of the frequency and structure of edentulism in elderly and senile people of the Republic of Sakha (Yakutia)
Published 2023-11-01“…Based on the results of the study of the frequency and structure of complete loss of teeth in the upper and lower jaws, to determine the need of elderly and senile people in prosthetics with complete removable orthopedic structures. …”
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Self-Supervised ECG Anomaly Detection Based on Time-Frequency Specific Waveform Mask Feature Fusion
Published 2025-01-01“…To address this issue, we propose an anomaly detection framework TFMAD that integrates ECG signal mask reconstruction with time-frequency contrastive learning, leveraging the correlation between time- and frequency-domain features for anomaly detection. …”
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Performance of Fitness Functions Based on Natural Frequencies in Defect Detection Using the Standard PSO-FEM Approach
Published 2021-01-01“…Structural defect detection based on finite element model (FEM) updating is an optimization problem by minimizing the discrepancy of responses between model and measurement. …”
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Ultrasonic Lamb Wave Detection Based on a Tunable, Narrow-Linewidth, and Frequency-Locked Fiber Laser
Published 2017-01-01“…The sensing system exhibits a high signal-to-noise ratio for ultrasonic detection and further application of the system for lamb wave detection makes it especially attractive for structural health monitoring.…”
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Modeling of Preload Bolted Flange Connection Structure for Loosening Analysis and Detection
Published 2022-01-01“…As bolt loosening leads to changes in the time and frequency domain of response, a new loosening detection method for the preload bolted flange connection is provided. …”
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Structural Fault Detection and Diagnosis for Combine Harvesters: A Critical Review
Published 2025-06-01“…Combine harvesters, as essential equipment in agricultural engineering, frequently experience structural faults due to their complex structure and harsh working conditions, which severely affect their reliability and operational efficiency, leading to significant downtime and reduced agricultural productivity during critical harvesting periods. …”
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A Model-Based Substructuring Method for Local Damage Detection of Structure
Published 2014-01-01“…Dividing a global structure into several substructures and regarding the frequency response functions (FRFs) measured at the interfaces between the adjacent substructures as the constraints, the constraint forces at the substructure nodes are calculated to decide the resultant responses. …”
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Influence of changes in the prestress force on dynamic specifications of the prestressed concrete beam
Published 2020-09-01Subjects: Get full text
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Fault detection in beam structure using adaptive immune based approach
Published 2024-01-01“…Here dynamic analysis of structure has been conducted as the forward method to find out the modal natural frequencies related with the damage. …”
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A Synchronous Tuning Control System for Very Low Frequency Communication Based on Real-Time Impedance Detection
Published 2024-11-01“…In this paper, a synchronous control algorithm based on real-time impedance detection and a synchronous control system structure are proposed. …”
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Application Research of Frequency-Modulated Continuous-Wave Displacement Sensor Based on Zero-Crossing Phase Detecting Algorithm
Published 2021-01-01“…Frequency-modulated continuous-wave (FMCW) interference, as a new technology of laser interferometry, has the advantages of length traceability, large range, high accuracy, simple structure, and optical fiber transmission. …”
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Partial Discharge Fault Detection of Substation GIS Based on CEEMDAN Fusion Processing Algorithm of Multi‐Frequency Signals
Published 2025-06-01“…By analyzing the typical GIS partial discharge fault state structure, segmented collection of substation GIS partial discharge data is carried out; Based on the window function method and nonlinear gain adjustment method, a limited impulse response filter with precise linear phase characteristics is selected for multi‐frequency signal enhancement processing; Simultaneously combining wavelet reconstruction technology and Fisher criterion to improve the CEEMDAN algorithm, obtaining a fused signal containing frequency feature information; Using CNN network model to fuse feature signals as input, achieve accurate detection of partial discharge faults in substation GIS. …”
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Terahertz Frequency-Modulated Continuous-Wave Inspection of an Ancient Enamel Plate
Published 2025-05-01Get full text
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UMFNet: Frequency-Guided Multi-Scale Fusion with Dynamic Noise Suppression for Robust Low-Light Object Detection
Published 2025-05-01“…The dominant low-light object detectors face the following <i>spectral trilemma</i>: (1) the loss of high-frequency structural details during denoising, (2) the amplification of low-frequency illumination distortion, and (3) cross-band interference in multi-scale features. …”
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Miniaturized Pathogen Detection System Using Magnetic Nanoparticles and Microfluidics Technology
Published 2024-10-01“…The detection device is based on flat, multilayer coils associated with microfluidic structures to detect magnetic nanoparticles linked to pathogen agents. …”
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Application of Particle Swarm Algorithm in Nanoscale Damage Detection and Identification of Steel Structure
Published 2022-01-01Get full text
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