Results 11 to 20 of about 343,728 (300)

Accurate Simulation of Neutrons in Less Than One Minute Pt. 2: Sandman—GPU-Accelerated Adjoint Monte-Carlo Sampled Acceptance Diagrams

open access: yesQuantum Beam Science, 2020
A computational method in the modelling of neutron beams is described that blends neutron acceptance diagrams, GPU-based Monte-Carlo sampling, and a Bayesian approach to efficiency.
Phillip Bentley
doaj   +1 more source

Multifunctional 25D metastructures enabled by adjoint optimization

open access: yesOptica, 2020
Optical metasurfaces are two-dimensional arrays of meta-atoms that modify different characteristics of light such as phase, amplitude, and polarization.
M. Mansouree   +5 more
semanticscholar   +1 more source

Solute Transport Control at Channel Junctions Using Adjoint Sensitivity

open access: yesMathematics, 2021
Water quality control and the control of contaminant spill in water in particular are becoming a primary need today. Gradient descent sensitivity methods based on the adjoint formulation have proved to be encouraging techniques in this context for river ...
Geovanny Gordillo   +2 more
doaj   +1 more source

Adjoint-Based Aerodynamic Design Optimization and Drag Reduction Analysis of a Military Transport Aircraft Afterbody

open access: yesAerospace, 2023
Based on the adjoint method, the afterbody of a military transport aircraft was optimized and designed to meet engineering constraints under real flight conditions.
Hanyue Rao   +4 more
doaj   +1 more source

Adjoints, multi-adjoints, pluri-adjoints

open access: yesBulletin of the Belgian Mathematical Society - Simon Stevin, 1995
Let \((G_p: {\mathcal A}_p\to {\mathcal X})_{p\in P}\) be a small family of functors having left adjoints, between small categories. If \({\mathcal A}\) is the coproduct of \(({\mathcal A}_p )_{p\in P}\) in \({\mathcal C}at\), the functor \(G: {\mathcal A}\to {\mathcal X}\) defined by \((G_p )_{p\in P}\) is proved to have a left multiadjoint in the ...
Solian, Alexandru, Viswanathan, T. M.
openaire   +3 more sources

Discrete adjoint approximations with shocks [PDF]

open access: yes, 2002
This paper is concerned with the formulation and discretisation of adjoint equations when there are shocks in the underlying solution to the original nonlinear hyperbolic p.d.e. For the model problem of a scalar unsteady one-dimensional p.d.e.
DR Lindquist   +5 more
core   +4 more sources

Adjoint-Based Multi-Point and Multi-Objective Optimization of a Turbocharger Radial Turbine

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2019
This paper presents a gradient-based design optimization of a turbocharger radial turbine for automotive applications. The aim is to improve both the total-to-static efficiency and the moment of inertia of the turbine wheel.
Lasse Mueller, Tom Verstraete
doaj   +1 more source

DAFoam: An Open-Source Adjoint Framework for Multidisciplinary Design Optimization with OpenFOAM

open access: yes, 2020
The adjoint method is an efficient approach for computing derivatives that allow gradient-based optimization to handle systems parameterized with a large number of design variables.
P. He, C. Mader, J. Martins, K. Maki
semanticscholar   +1 more source

Sources of air pollution-related health impacts and benefits of radially applied transportation policies in 14 US cities

open access: yesFrontiers in Sustainable Cities, 2023
As the world becomes increasingly urbanized, growing populations are exposed to poor ambient air quality and at risk of the associated health outcomes. Urban air quality is affected both by local sources of air pollution and sources outside city borders.
M. Omar Nawaz   +6 more
doaj   +1 more source

Analytic Adjoint Solutions for the Quasi-1D Euler Equations [PDF]

open access: yes, 2000
The analytic properties of adjoint solutions are examined for the quasi-1D Euler equations. For shocked flow, the derivation of the adjoint problem reveals that the adjoint variables are continuous with zero gradient at the shock, and that an internal ...
Giles, M. B., Pierce, Niles A.
core   +2 more sources

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