Results 31 to 40 of about 436,878 (286)
On the Analytic Wavelet Transform
, 2010 An exact and general expression for the analytic wavelet transform of a real-valued signal is constructed, resolving the time-dependent effects of non-negligible amplitude and frequency modulation.
Lilly, Jonathan M., Olhede, Sofia C.
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Hospital Readmission After Traumatic Brain Injury Hospitalization in Community‐Dwelling Older Adults
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective To examine the risk of hospital readmission after an index hospitalization for TBI in older adults. Methods Using data from the Atherosclerosis Risk in Communities (ARIC) study, we used propensity score matching of individuals with an index TBI‐related hospitalization to individuals with (1) non‐TBI hospitalizations (primary analysis)
Rachel Thomas +7 more
wiley +1 more source
Varactor-Tuned Dual-Mode Frequency Discriminator for Instantaneous Frequency Measurements [PDF]
, 2013 In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated which doubles the discriminator tuning bandwidth.
Hong, Jiasheng +2 more
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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
Franklin OpenMany real-life non-stationary signals, such as jammers or communication signals, exhibit abrupt transitions in instantaneous frequency. Estimating instantaneous frequencies of such signals is vital in applications involving interference mitigation in ...
Sadiq Ali, Nabeel Ali Khan
doaj +1 more source
CT Lilun yu yingyong yanjiu, 2023 Natural gas hydrate is a new energy source with great potential. Studying the seismic response characteristics of natural gas hydrate in permafrost area is crucial to the exploration and development of natural gas hydrate in China's land area.
Wenhai YANG +3 more
doaj +1 more source
Comparison of techniques for estimating the frequency selectivity of bandlimited channels [PDF]
, 2000 A transmission channel used in application such as telecommunications can be modeled as a bandpass filter. Measurement of the frequency selectivity of the channel is important to ensure that the information-bearing signal has minimal distortion and loss ...
Sha’ameri, Ahmad Zuri
core
Analyse des signaux AM-FM basée sur une version B-splines de l'EMD-ESA [PDF]
, 2012 In this paper a signal analysis framework for estimating time-varying amplitude and frequency functions of multicomponent amplitude and frequency modulated (AM–FM) signals is introduced.
BOUCHIKHI, Abdelkhalek +1 more
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Instantaneous Frequency Estimation and Localization
, 2016 In many applications, a critical feature of a non-stationary signal is provided by its instantaneous frequency (IF), which accounts for the signal spectral variations as a function of time. This chapter presents methods and algorithms for the localization and estimation of the signal IF using time-frequency (t,f) based methods.
El-Jaroudi, A. +13 more
openaire +3 more sources
A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller
International Journal of Adaptive Control and Signal Processing, EarlyView.Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg +5 more
wiley +1 more source