Results 21 to 30 of about 4,843 (209)

Variational approach to eikonal function computation [PDF]

open access: yesКомпьютерная оптика, 2018
The problem of calculating the eikonal function from the condition of focusing into a prescribed region is formulated as a variational problem and as a Monge-Kantorovich mass transportation problem.
Leonid Doskolovich   +3 more
doaj   +1 more source

On the Eikonal approximation in AdS space [PDF]

open access: yesJournal of High Energy Physics, 2009
We explore the eikonal approximation to graviton exchange in AdS_5 space, as relevant to scattering in gauge theories. We restrict ourselves to the regime where conformal invariance of the dual gauge theory holds, and to large 't Hooft coupling where the computation involves pure gravity.
Brower, Richard C.   +2 more
openaire   +3 more sources

Hybrid of differential quadrature and sub-gradients methods for solving the system of Eikonal equations

open access: yesNonlinear Engineering, 2021
Many important natural phenomena of wave propagations are modeled by Eikonal equations and a variety of new methods are needed to solve them. The differential quadrature method (DQM) is an effective numerical method for solving the system of differential
Meher Mehrollah, Rostamy Davood
doaj   +1 more source

THE METHOD OF CALCULATION OF COEFFICIENTS OF THE PHASE ABERRATIONS OF AXIALLY ASYMMETRIC DUAL REFLECTOR ANTENNAS

open access: yesНаучный вестник МГТУ ГА, 2019
Aerodrome-enroute surveillance radar systems (ARSR) of civil aviation are designed for detection of aerial objects and determination of their range and movement parameters.
B. N. Laskin, E. A. Bolelov
doaj   +1 more source

Software for the numerical solution of first-order partial differential equations

open access: yesDiscrete and Continuous Models and Applied Computational Science, 2019
Partial differential equations of the first order, arising in applied problems of optics and optoelectronics, often contain coefficients that are not defined by a single analytical expression in the entire considered domain.
Yaroslav Yu Kuziv
doaj   +1 more source

Variational interpretation of the eikonal calculation problem from the condition of generating a prescribed irradiance distribution [PDF]

open access: yesКомпьютерная оптика, 2018
The problem of calculation of the light field eikonal defined on a certain surface from the condition of generating a prescribed irradiance distribution on another surface is formulated as a Monge-Kantorovich mass transportation problem. We show that the
Albert Mingazov   +3 more
doaj   +1 more source

Eikonal Equation Reproduces Natural Landscapes With Threshold Hillslopes

open access: yesGeophysical Research Letters, 2023
Many natural landscapes maintain steep planar hillslopes bounded at a typical angle, beyond which shallow landslides or slope failures remove the excess sediment volume by mass wasting.
Shashank Kumar Anand   +3 more
doaj   +1 more source

Simplified dynamical eikonal approximation

open access: yes, 2020
Background: Breakup reactions are often used to probe the nuclear structure of halo nuclei. The eikonal model diverges for Coulomb breakup since it relies on the adiabatic approximation.
Hebborn, Chloë, Baye, Daniel Jean
core   +1 more source

Non-factorizable virtual corrections to Higgs boson production in weak boson fusion beyond the eikonal approximation

open access: yesJournal of High Energy Physics, 2023
Non-factorizable virtual corrections to Higgs boson production in weak boson fusion at next-to-next-to-leading order in QCD were estimated in the eikonal approximation [1]. This approximation corresponds to the expansion of relevant amplitudes around the
Ming-Ming Long   +2 more
doaj   +1 more source

Sub-eikonal corrections to scattering amplitudes at high energy

open access: yesJournal of High Energy Physics, 2019
Most of the progress in high-energy Quantum Chromodynamics has been obtained within the eikonal approximation and infinite Wilson-line operators. Evolution equations of Wilson lines with respect to the rapidity parameter encode the dynamics of the ...
Giovanni Antonio Chirilli
doaj   +1 more source

Home - About - Disclaimer - Privacy