Results 41 to 50 of about 193,905 (317)

On the global boundedness of Fourier integral operators [PDF]

open access: yesAnnals of Global Analysis and Geometry, 2010
30 ...
CORDERO, Elena   +2 more
openaire   +4 more sources

On the Definition of Energy Flux in One-Dimensional Chains of Particles

open access: yesEntropy, 2019
We review two well-known definitions present in the literature, which are used to define the heat or energy flux in one dimensional chains. One definition equates the energy variation per particle to a discretized flux difference, which we here show it ...
Paolo De Gregorio
doaj   +1 more source

Fourier integral operators with fold singularities. [PDF]

open access: yesJournal für die reine und angewandte Mathematik (Crelles Journal), 1994
Sharp \(L^ 2 \to L^ q_ \alpha\) estimates are proved for a class of Fourier integral operators with associated canonical relation \({\mathcal C} \subset T^*X \times T^*Y\). It is assumed that one of the projection to \({\mathcal C} \to T^*X\) or \({\mathcal C} \to T^*Y\) is a fold or a submersion with folds.
Greenleaf, Allan, Seeger, Andreas
openaire   +1 more source

Inverse Problem for a Partial Differential Equation with Gerasimov–Caputo-Type Operator and Degeneration

open access: yesFractal and Fractional, 2021
In the three-dimensional open rectangular domain, the problem of the identification of the redefinition function for a partial differential equation with Gerasimov–Caputo-type fractional operator, degeneration, and integral form condition is considered ...
Tursun K. Yuldashev   +1 more
doaj   +1 more source

Multigrid method for pricing European options under the CGMY process

open access: yesAIMS Mathematics, 2019
We propose a fast multigrid method for solving the discrete partial integro-differential equations (PIDEs) arising from pricing European options when the underlying asset is driven by an infinite activity Lévy process.
Justin W. L. Wan
doaj   +1 more source

One result on boundedness of the Hilbert transform in Marcinkiewics spaces

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
In mathematics and in signal theory, the Hilbert transform is an important linear operator that takes a real-valued function and produces another real-valued function.
Nurken Tursynbayuly Bekbayev   +1 more
doaj   +1 more source

Optimized Time–Frequency Analysis for Induction Motor Fault Detection Using Hybrid Differential Evolution and Deep Learning Techniques

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
Workflow of the parameter optimization process for ITSC fault detection, applying Differential Evolution optimization and the Smooth Pseudo Wigner‐Ville Distribution for signal processing. The optimized parameters are then used in the failure identification pipeline, which combines the signal processing with a YOLO‐based architecture for fault severity
Rafael Martini Silva   +4 more
wiley   +1 more source

ON THE SPECTRUM OF THE ONE-DIMENSIONAL SCHRÖDINGER HAMILTONIAN PERTURBED BY AN ATTRACTIVE GAUSSIAN POTENTIAL

open access: yesActa Polytechnica, 2017
We propose a new approach to the problem of finding the eigenvalues (energy levels) in the discrete spectrum of the one-dimensional Hamiltonian with an attractive Gaussian potential by using the well-known Birman-Schwinger technique. However, in place of
Silvestro Fassari   +3 more
doaj   +1 more source

Analytical solutions to the advection-diffusion equation with Atangana-Baleanu time-fractional derivative and a concentrated loading

open access: yesAlexandria Engineering Journal, 2021
In this communication we have studied well known physical process of two-dimensional advection–diffusion phenomena. The advection–diffusion equation is time-fractionalized by exploiting Atangana-Baleanu fractional derivative operator.
Itrat Abbas Mirza   +4 more
doaj   +1 more source

Approximation of Fourier Integral Operators by Gabor Multipliers [PDF]

open access: yesJournal of Fourier Analysis and Applications, 2012
22 ...
CORDERO, Elena, K. Groechenig, F. Nicola
openaire   +5 more sources

Home - About - Disclaimer - Privacy