Results 21 to 30 of about 1,144,435 (297)

Bayesian spectral modeling for multiple time series [PDF]

open access: yes, 2019
We develop a novel Bayesian modeling approach to spectral density estimation for multiple time series. The log-periodogram distribution for each series is modeled as a mixture of Gaussian distributions with frequency-dependent weights and mean functions.
Cadonna, Annalisa   +2 more
core   +1 more source

Determination of optimal damping parameters for seismic isolation systems [PDF]

open access: yesИнженерно-строительный журнал, 2013
If seismic isolation system consists of elastic-damping bearings, it transforms protected object into the flow-frequency system. Thus, damping in SIS should be high enough to eliminate resonance effect. Therefore application of damping makes a problem of
N.V. Kovaleva   +2 more
doaj   +1 more source

CORRELATION-SPECTRAL ANALYSIS OF THE TOPOGRAPHY OF ENGINEERING SURFACES AT THE NANOSCALE LEVEL

open access: yesФизико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2021
The nanotopography of some typical technical surfaces is investigated and the characteristics of the nanoroughness profile as a random process are experimentally determined – the autocorrelation function and spectral density.
V.V. Izmailov, M.V. Novoselova
doaj   +1 more source

Energy spectrum and phase diagrams of two-sublattice hard-core boson model

open access: yesCondensed Matter Physics, 2013
The energy spectrum, spectral density and phase diagrams have been obtained for two-sublattice hard-core boson model in frames of random phase approximation approach.
I.V. Stasyuk, O. Vorobyov
doaj   +1 more source

Simulation and experimental development of a temperature control system of a radiation calibration source based on a PID-regulyator

open access: yesВестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2017
Improvement of methods of radiometric correction for multichannel spectral hardware and wide usage of LED-sources require the development of both mathematical and experimental methods of calibration of the obtained spectral data.
V. V. Volkov
doaj   +1 more source

Comparison Between the Exact Likelihood and Whittle Likelihood for Moving Average Processes

open access: yesStatistica, 2022
For Gaussian stationary processes, the likelihood functions include the inverse and determinant of the covariance matrices, and Whittle likelihood is considered as a standard technique to avoid expensive matrix determinant and inversions under large ...
Xiaofei Xu   +2 more
doaj   +1 more source

Complex quantum networks as structured environments: engineering and probing [PDF]

open access: yes, 2016
We consider structured environments modeled by bosonic quantum networks and investigate the probing of their spectral density, structure, and topology. We demonstrate how to engineer a desired spectral density by changing the network structure.
Galve, Fernando   +4 more
core   +2 more sources

Spectrum Concentration in Deep Residual Learning: A Free Probability Approach

open access: yesIEEE Access, 2019
We revisit the weight initialization of deep residual networks (ResNets) by introducing a novel analytical tool in free probability to the community of deep learning.
Zenan Ling, Robert C. Qiu
doaj   +1 more source

Simulation of loads on operating device of peat-cutting unit with regard to errors in the cutting elements arrangement

open access: yesГорные науки и технологии, 2022
The practice of using units with milling-type operating devices showed their insufficient reliability, which leads to deterioration of the units’ performance. The reasons for this are high dynamic loads in structural members, which are caused by external
Konstantin V. Fomin
doaj   +1 more source

On the Effects of Structural Coupling on Piezoelectric Energy Harvesting Systems Subject to Random Base Excitation

open access: yesAerospace, 2020
The current research investigates the novel approach of coupling separate energy harvesters in order to scavenge more power from a stochastic point of view.
Hamidreza Masoumi   +3 more
doaj   +1 more source

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