Results 51 to 60 of about 75,899 (299)
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Background X‐linked adrenoleukodystrophy (X‐ALD) is a neurometabolic disorder caused by pathogenic variants in ABCD1, leading to slowly progressive spinal cord disease in nearly all affected men. Sensitive biomarkers to quantify disease severity and predict progression are needed for clinical care and trial design.
Eda G. Kabak +4 more
wiley +1 more source
Breaking the Limits: Redefining the Instantaneous Frequency [PDF]
Circuits, Systems, and Signal Processing, 2017 The Carson and Fry (1937) introduced the concept of variable frequency as a generalization of the constant frequency. The instantaneous frequency (IF) is the time derivative of the instantaneous phase and it is well-defined only when this derivative is positive.
openaire +4 more sources
Deep Learning Pose Estimation for Phenotyping of Co‐Occurring Hyperkinetic Movement Disorders
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To explore whether routine outpatient video combined with deep learning‐based pose estimation and clinically interpretable kinematic features can support multi‐label phenotyping of co‐occurring hyperkinetic movement disorders (HMDs).
Laura Cif +17 more
wiley +1 more source
Adaptive instantaneous frequency estimation: Techniques and algorithms [PDF]
, 2002 This thesis deals with the problem of the instantaneous frequency (IF) estimation of sinusoidal signals. This topic plays significant role in signal processing and communications.\ud \ud Depending on the type of the signal, two major approaches are ...
Hussain, Zahir M
core
An Instantaneous Frequency Estimation Approach in a High Noise Environment [PDF]
, 2012 An instantaneous frequency (IF) estimation algorithm in a high noise environment is proposed based on singular value decomposition (SVD) and Wigner Ville distribution (WVD).The signal is demodulated with the estimated phase to make the time frequency ...
Xianglong, Luo
core +1 more source
Global Rather Than Vertical‐Selective Saccadic Abnormalities in Progressive Supranuclear Palsy
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To test whether vertical saccades are preferentially affected in Progressive Supranuclear Palsy (PSP). Methods PSP patients (n = 24) were compared to age‐matched controls (n = 94) and two degenerative groups (Alzheimer's disease, n = 20; Lewy body disease, n = 50).
Duy Duan Nguyen +6 more
wiley +1 more source
Radon spectrogram-based approach for automatic IFs separation
EURASIP Journal on Advances in Signal Processing, 2020 The separation of overlapping components is a well-known and difficult problem in multicomponent signals analysis and it is shared by applications dealing with radar, biosonar, seismic, and audio signals.
Vittoria Bruni +2 more
doaj +1 more source
Measurement: Sensors, 2023 The basic concepts and methods of joint time-frequency distributions are discussed. The primary purpose is to demonstrate how a signal's spectral composition alters over time as well as to modify the underlying physical and mathematical concepts of a ...
Shaik Mohammed Shareef +1 more
doaj +1 more source
Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane +3 more
wiley +1 more source
Local instantaneous frequency estimation of multi-component signals [PDF]
, 2008 We present a method for estimating the instantaneous frequency (IF) of multi-component signals. This method involves the calculation of a time-frequency energy density of the signal, then obtaining a local IF estimate from this joint density.
Oeztuerk, Mahmut, Akan, AYDIN
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