Results 21 to 30 of about 2,687,450 (307)
Archives of Metallurgy and Materials, 2015 In this work, we present a novel Hilbert-twin method to compute an envelope and the logarithmic decrement, δ, from exponentially damped time-invariant harmonic strain signals embedded in noise.
Magalas L.B., Majewski M.
doaj +1 more source
Time-Frequency Analysis of Noisy Vibration Signal Based on Improved Hilbert-Huang Transform
Shanghai Jiaotong Daxue xuebao, 2023 Aimed at the phenomenon of modal confusion and lack of practical significance of instantaneous frequency caused by Hilbert-Huang transform (HHT) noisy vibration signal time-frequency analysis, complete ensemble empirical mode decomposition with adaptive ...
SUN Miao, YANG Junkai, WU Li
doaj +1 more source
A Hilbert transform for hermitean matrix functions on fractal domains [PDF]
, 2012 We consider Holder continuous circulant (2 × 2) matrix functions defined on the fractal boundary of a Jordan domain in R2n. The main goal is to establish a Hilbert transform for such functions, within the framework of Hermitean Clifford analysis. This is
Abreu Blaya, Ricardo +4 more
core +2 more sources
Pulse Signal Analysis Method Based on Improved HHT [PDF]
Jisuanji gongcheng, 2019 The traditional Hilbert-Huang Transform(HHT) has low accuracy in Empirical Mode Decomposition(EMD) when processing pulse signals,and there are mode mixing problems.In response to this problem,this paper proposes an improved HHT method.Combined with Time ...
KUANG Xue, LI Zhi, WANG Yongjun, ZHANG Shaorong
doaj +1 more source
Invisibility on demand based on a generalized Hilbert transform [PDF]
Physical Review A, 2017 We propose a feasible invisibility approach to suppress the scattering of waves from or to given directions and for particular frequencies, i.e., invisibility on demand.
Z. Hayran +4 more
semanticscholar +1 more source
Vector valued inequalities for families of bilinear Hilbert transforms and applications to bi-parameter problems [PDF]
, 2012 Muscalu, Pipher, Tao and Thiele \cite{MPTT} showed that the tensor product between two one dimensional paraproducts (also known as bi-parameter paraproduct) satisfies all the expected $L^p$ bounds.
Bateman +11 more
core +1 more source
Reduced Leakage Synchrophasor Estimation: Hilbert Transform Plus Interpolated DFT
IEEE Transactions on Instrumentation and Measurement, 2019 Synchrophasor estimation is typically performed by means of spectral analysis based on the discrete Fourier transform (DFT). Traditional DFT approaches, though, suffer from several uncertainty contributions due to the stationarity assumption, spectral ...
G. Frigo, A. Derviškadić, M. Paolone
semanticscholar +1 more source
Directionality Fields Generated by a Local Hilbert Transform in Optics [PDF]
2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2017 Conventional Hilbert transform in time (Kramers Kronig relation) is due to causality, in other words to time asymmetry, i.e. to the arrow of time.
K. Staliūnas +5 more
semanticscholar +1 more source
On the $X$-ray transform of planar symmetric 2-tensors [PDF]
, 2015 In this paper we study the attenuated $X$-ray transform of 2-tensors supported in strictly convex bounded subsets in the Euclidean plane. We characterize its range and reconstruct all possible 2-tensors yielding identical $X$-ray data.
Sadiq, Kamran +2 more
core +1 more source
Criterion on Lp1×Lp2→Lq-Boundedness for Oscillatory Bilinear Hilbert Transform
Abstract and Applied Analysis, 2014 We investigate the bilinear Hilbert transform with oscillatory factors and the truncated bilinear Hilbert transform.
Zuoshunhua Shi, Dunyan Yan
doaj +1 more source