Results 41 to 50 of about 1,487,794 (276)

Continuous energy adjoint transport for photons in PHITS

open access: yesEPJ Web of Conferences, 2017
Adjoint Monte Carlo can be an effcient algorithm for solving photon transport problems where the size of the tally is relatively small compared to the source. Such problems are typical in environmental radioactivity calculations, where natural or fallout
Malins Alex   +2 more
doaj   +1 more source

Gauging 1-form center symmetries in simple SU(N) gauge theories

open access: yesJournal of High Energy Physics, 2020
Consequences of gauging exact ℤ k C $$ {\mathbb{Z}}_k^C $$ center symmetries in several simple SU(N) gauge theories, where k is a divisor of N, are investigated.
Stefano Bolognesi   +2 more
doaj   +1 more source

Backpropagation and F-adjoint

open access: yes, 2023
This paper presents a concise mathematical framework for investigating both feed-forward and backward process, during the training to learn model weights, of an artificial neural network (ANN).
Ahmed Boughammoura (15294187)
core   +1 more source

Development of a variational flux inversion system (INVICAT v1.0) using the TOMCAT chemical transport model [PDF]

open access: yesGeoscientific Model Development, 2014
We present a new variational inverse transport model, named INVICAT (v1.0), which is based on the global chemical transport model TOMCAT, and a new corresponding adjoint transport model, ATOMCAT.
C. Wilson   +3 more
doaj   +1 more source

Scalable Design and Optimization of Reconfigurable Sb2S3 Metasurfaces

open access: yesAdvanced Optical Materials, EarlyView.
Scalable optimization methodologies are developed for reconfigurable Sb2S3 Huygens metasurfaces by combining localized phase‐match and overlap‐integral cost functions that account for inter‐element coupling. The framework enables computationally efficient design of large‐area, dual‐state flat optical devices with arbitrary wavefront transformations ...
Siddharth Padmanabha   +2 more
wiley   +1 more source

CAD Integrated Multipoint Adjoint-Based Optimization of a Turbocharger Radial Turbine

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2017
The adjoint method is considered as the most efficient approach to compute gradients with respect to an arbitrary number of design parameters. However, one major challenge of adjoint-based shape optimization methods is the integration into a computer ...
Lasse Mueller, Tom Verstraete
doaj   +1 more source

Efficient Algorithms for Solution of the Adjoint Compressible Navier-Stokes Equations with Applications [PDF]

open access: yes, 2006
The complete discrete adjoint equations for an unstructured finite volume compressible Navier-Stokes solver are discussed with respect to the memory and time efficient evaluation of their residuals, and their solution.
Brezillon, Joel   +2 more
core  

Neural Fields for Highly Accelerated 2D Cine Phase Contrast MRI

open access: yesAdvanced Science, EarlyView.
ABSTRACT 2D cine phase contrast (CPC) MRI provides quantitative information on blood velocity and flow within the human vasculature. However, data acquisition is time‐consuming, motivating the reconstruction of the velocity field from undersampled measurements to reduce scan times. In this work, neural fields are proposed as a continuous spatiotemporal
Pablo Arratia   +7 more
wiley   +1 more source

Partition function of free conformal fields in 3-plet representation

open access: yesJournal of High Energy Physics, 2017
Simplest examples of AdS/CFT duality correspond to free CFTs in d dimensions with fields in vector or adjoint representation of an internal symmetry group dual in the large N limit to a theory of massless or massless plus massive higher spins in AdS d+1.
Matteo Beccaria, Arkady A. Tseytlin
doaj   +1 more source

THEORY OF LOOPS AND STRINGS WITH MATTER IN THE ADJOINT REPRESENTATION

open access: yesInternational Journal of Modern Physics A, 1995
We have presented canonical and path integral formulations of a theory of loops and closed strings with the matter field quanta transforming in the adjoint representation of the SU (N) gauge group. The physical processes arising out of the interactions of loops and closed strings are discussed.
Maharana, Jnanadeva, Singh, Lambodar P.
openaire   +2 more sources

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