Results 31 to 40 of about 10,707,489 (316)

MULTIPLE FOURIER SERIES AND FOURIER INTEGRALS WITH NON-SEPARABLE VARIABLES

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2020
Background. Integral transforms for functions of several variables are an actively developing area of mathematical analysis. Numerous applications in integral transforms method for solving equations of mathematical physics, in signal processing of ...
O. E. Yaremko   +2 more
doaj   +1 more source

New approach for the determination of the characteristics of signals containing fluctuating harmonics [PDF]

open access: yesInternational Journal of Metrology and Quality Engineering, 2011
This paper describes a new approach for the analysis of signals containing fluctuating harmonics. It is based on the Fourier transform, using windowing to reduce the error arising from analysing the signal over a non integer number of signal periods and ...
Poletaeff A., Espel P.
doaj   +1 more source

Hybrid Fourier series and smoothing spline path non-parametrics estimation model

open access: yesFrontiers in Applied Mathematics and Statistics, 2023
Pathway analysis is one way to determine whether there is a causal relationship between extrinsic and intrinsic factors. The linearity assumption is something that can change the model. The shape of the model is subject to linearity assumptions.
Atiek Iriany   +1 more
doaj   +1 more source

Nonlinear Solution to a Non-Fourier Heat Conduction Problem in a Slab Heated by Laser Source

open access: yesArchive of Mechanical Engineering, 2016
The effect of laser, as a heat source, on a one-dimensional finite body was studied in this paper. The Cattaneo-Vernotte non-Fourier heat conduction model was used for thermal analysis.
Noroozi Mohammad Javad   +2 more
doaj   +1 more source

Dissociation of first- and second-order motion systems by perceptual learning [PDF]

open access: yes, 2012
Published in final edited form as: Atten Percept Psychophys. 2012 July ; 74(5): 1009–1019. doi:10.3758/s13414-012-0290-3.Previous studies investigating transfer of perceptual learning between luminance-defined (LD) motion and texture-contrast-defined (CD)
Chubb, Charles., Vaina, Lucia M.
core   +1 more source

Element Differential Method for Non-Fourier Heat Conduction in the Convective-Radiative Fin with Mixed Boundary Conditions

open access: yesCoatings, 2022
Fin is an efficient and straightforward way to enhance heat transfer rate. When the heat source varies dramatically in a very short time, non-Fourier heat conduction should be considered.
Jing Ma, Yasong Sun, Sida Li
semanticscholar   +1 more source

A Distance-Limited Imaging Survey of Sub-Stellar Companions to Solar Neighborhood Stars [PDF]

open access: yes, 2008
We report techniques and results of a Palomar 200-inch (5 m) adaptive optics imaging survey of sub-stellar companions to solar-type stars. The survey consists of Ks coronagraphic observations of 21 FGK dwarfs out to 20 pc (median distance about 17 pc ...
Alexander L. Rudolph   +37 more
core   +1 more source

A new solution for nonlinear Dual Phase

open access: yesAlexandria Engineering Journal, 2016
The application of new methods to solution of non-Fourier heat transfer problems has always been one of the interesting topics among thermal science researchers. In this paper, the effect of laser, as a heat source, on a thin film was studied.
Mohammad Javad Noroozi   +2 more
doaj   +1 more source

Models of ballistic propagation of heat at low temperatures [PDF]

open access: yes, 2016
Heat conduction at low temperatures show various effects that cannot be described by the Fourier law, like the second sound and ballistic propagation.
Kovács, R., Ván, P.
core   +2 more sources

Discrete Quadratic-Phase Fourier Transform: Theory and Convolution Structures

open access: yesEntropy, 2022
The discrete Fourier transform is considered as one of the most powerful tools in digital signal processing, which enable us to find the spectrum of finite-duration signals.
Hari M. Srivastava   +3 more
doaj   +1 more source

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