Results 31 to 40 of about 1,520,902 (172)
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT In this paper, an integrated digital twin‐based fault‐diagnosis framework is proposed to detect bolt loosening in flanged pipe connections. The approach combines finite element‐based numerical modeling, experimental modal analysis, and advanced signal processing‐assisted deep learning to achieve reliable loosening detection under operational ...
Milad Shabani Yousefabad +4 more
wiley +1 more source
Estimation of instantaneous frequency using the discrete Wigner distribution
Electronics Letters, 1990 Analytical expressions for the performance of the discrete Wigner distribution (DWD) in estimating the instantaneous frequency of linear frequency modulated signals in additive white noise are derived and verified using simulation. It is shown that the DWD peak provides an optimal estimate at high input signal-to-noise ratios.
P. Rao, F.J. Taylor
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Repeated Pleistocene Permafrost Episodes in the Western Pannonian Basin
Permafrost and Periglacial Processes, EarlyView.ABSTRACT Concerning the study of past periglacial processes, the Pannonian Basin is a key area as it contains the southernmost frost polygons found in Central Europe. The presence or absence of permafrost is still, however, a matter of debate, and data on the timing of frost action are also scarce.
Krisztina Sebe +5 more
wiley +1 more source
Pseudo Affine Wigner Distributions
, 2006 Conference PaperIn this paper, we introduce a new set of tools for time-varying spectral analysis: the pseudo affine Wigner distributions. Based on the affine Wigner distributions of J. and P.
Baraniuk, Richard G., Goncalves, Paulo
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Unlocking n‐alk‐1‐ynes conformers: Quantum “trigger finger” versus “stiff joint” conformations
Smart Molecules, EarlyView.Quantum chemical analysis reveals the unique function of n‐alk‐1‐yne terminus as a Quantum “Trigger Finger,” exhibiting two near‐isoenergetic conformers (Cs ${\mathrm{C}}_{s}$and C1 ${\mathrm{C}}_{1}$) locked by a symmetric high barrier. This contrasts with the lower asymmetric barrier of the conventional asymmetric “Stiff Joint” alkyl chain.
Ioan Bâldea
wiley +1 more source
Nanophotonics, Volume 15, Issue 17, 11 September 2026.A unified fiber‐wireless integrated sensing and communication system is enabled by a single microwave photonic platform with a time‐phase synthesis dimension waveform. This architecture simultaneously delivers high‐speed data transmission, high‐precision wireless ranging, and accurate fiber diagnostics over a high‐power analog radio‐over‐fiber link ...
Shengkun Chen +9 more
wiley +1 more source
Microbiome‐mediated plant‐soil feedbacks as a tool for resilient agriculture
iMetaOmics, Volume 3, Issue 3, September 2026.Translating plant‐soil feedbacks (PSFs) into reliable agricultural management requires shifting from input‐dependent practices toward endogenous, process‐driven crop resilience. To bridge this gap, we propose a predictive framework centered on three strategic interventions: engineering the crop holobiont, diversifying the soil habitat, and deploying ...
Muhammad Asif +4 more
wiley +1 more source
Wigner distributions for qudits
, 2006 Two new approaches to the problem of setting up Wigner distributions for finite level quantum systems are proposed. Both arise by looking at the structure of the familiar Wigner distribution for Cartesian quantum mechanics from different perspectives ...
Chaturvedi, S.
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On the linear relations connecting the components of the discrete Wigner distribution in the case of real-valued signals [PDF]
2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100), 2002 It was shown that information conveyed by the discrete Wigner distribution is highly redundant, linear relations connecting its time-frequency components. This means that every component of the discrete Wigner distribution can be expressed as a linear combination of the elements of a basis.
Richard, Cédric, Lengellé, Régis
openaire +3 more sources
Plasma Processes and Polymers, Volume 23, Issue 9, September 2026.The solid carbon growth rate and surface characteristics are assessed during microwave plasma conversion of methane. Increasing pressure from 50 to 100 mbar enhances the growth rate of wall‐deposited carbon. Dense, smooth carbon‐like films are observed at the near position at 50 mbar,whereas loose, fish‐scale‐like carbon black particles are observed at
Xiaoyu Wang +6 more
wiley +1 more source