Results 81 to 90 of about 1,401 (153)

Millennial Cycles in Greenland and Antarctic Ice Core Records: Evidence of Astronomical Influence on Global Climate

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 7, 16 April 2025.
Abstract Multimillennial‐scale climate events are well‐documented in ice‐core records from both Greenland and Antarctica, yet the role of orbital and solar input oscillations in shaping these events remains unresolved. In this study, we analyze two high‐resolution oxygen isotope records from Greenland and Antarctica to assess the influence of orbital ...
Vadim A. Kravchinsky, Rui Zhang, Ryan Borowiecki, Avto Goguitchaichvili, Jan Czarnecki, Andrzej Czarnecki, Niklas Boers, André Berger, Mirko van der Baan   +8 more
wiley   +1 more source

Extreme-Point Symmetric Mode Decomposition Method for Data Analysis

, 2013
An extreme-point symmetric mode decomposition (ESMD) method is proposed to improve the Hilbert-Huang Transform (HHT) through the following prospects: (1) The sifting process is implemented by the aid of 1, 2, 3 or more inner interpolating curves, which ...
Li, Zong-Jun, Wang, Jin-Liang
core   +1 more source

Damage detection for railway bridges using time‐frequency decomposition and conditional generative model

Computer-Aided Civil and Infrastructure Engineering, Volume 40, Issue 7, Page 959-977, 10 March 2025.
Abstract A novel damage detection model, which utilizes the spatiotemporal characteristics of the acceleration data, is proposed to assess the structural integrity of railway bridges. For this, the measured acceleration data are decomposed into several intrinsic mode functions (IMFs) using the sparse random mode decomposition model.
Jun S. Lee, Jeongjun Park, Hyun Min Kim, Robin Eunju Kim   +3 more
wiley   +1 more source

THE APPLICATION OF LCD AND SWT IN FAULT DIAGNOSIS OF ROLLING BEARING

Jixie qiangdu, 2019
In order to overcome the difficulty of feature extraction of non-stationary faulty signals in rolling bearing fault diagnosis under strong noise background, a method based on local characteristic-scale decomposition and synchrosqueezing wavelet transform
LIU YiYa, LI Ke, CHEN Peng
doaj  

Fourier Synchrosqueezing Transform-ICA-EMD Framework Based EOG-Biometric Sustainable and Continuous Authentication via Voluntary Eye Blinking Activities. [PDF]

Biomimetics (Basel), 2023
Gorur K.
europepmc   +1 more source

Inference of synchrosqueezing transform -- toward a unified statistical analysis of nonlinear-type time-frequency analysis

, 2019
We provide a statistical analysis of a tool in nonlinear-type time-frequency analysis, the synchrosqueezing transform (SST), for both the null and non-null cases.
Sourisseau, Matt, Wu, Hau-Tieng, Zhou, Zhou   +2 more
core  

Enhanced Synchrosqueezing Transform for Detecting Non-Traditional Flight Modes in High Angle of Attack Maneuvers

Mathematical and Computational Applications
Due to nonlinear aerodynamics, “non-traditional” flight modes may appear in longitudinal and lateral/directional dynamics once an aircraft experiences a high angle of attack and rapid maneuvers.
Seyed Amin Bagherzadeh, Hamed Mohammadkarimi, Mohammad Hossein Alizadeh   +2 more
doaj   +1 more source

High-Order Time-Reassigned Synchrosqueezing Transform and Its Application in Tight Sandstone Gas Reservoir

IEEE Access
Time-frequency analysis (TFA) can provide relevant information about subsurface reservoirs, which is essential in reservoir identification. Traditional TFA methods are limited by resolution, resulting in unreliable seismic interpretation.
Qiuxiang Zhu, Qifei Li, Yutao Xie, Hui Chen, Yiting Mao   +4 more
doaj   +1 more source

ULTRASONIC SIGNAL FEATURE EXTRACTION METHOD BASED ON GENERAL CROSS-VALIDATION THRESHOLDING IN SYNCHROSQUEEZING WAVELET DOMAIN

Jixie qiangdu, 2020
Using ultrasonic non-destructive testing technology,when detecting the surface crack of the shaft,the micro crack echo signal is often covered by various noises,which causes the crack to be unrecognizable and positioned. In order to solve this problem,in
XIAO ChangMing, XIAO Han, YI CanCan
doaj  

Intrapulse Modulation Radar Signal Recognition Using CNN with Second-Order STFT-Based Synchrosqueezing Transform

Remote Sensing
Intrapulse modulation classification of radar signals plays an important role in modern electronic reconnaissance, countermeasures, etc. In this paper, to improve the recognition rate at low signal-to-noise ratio (SNR), we propose a recognition method ...
Ning Dong, Hong Jiang, Yipeng Liu, Jingtao Zhang   +3 more
doaj   +1 more source