Results 31 to 40 of about 2,483 (203)

The Continuous Classical Optimal Control Problems for Triple Elliptic Partial Differential Equations

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2020
In this paper the Galerkin method is used to prove the existence and uniqueness theorem for the solution of the state vector of the triple linear elliptic partial differential equations for fixed continuous classical optimal control vector.
J. A. Al-Hawasy, Doaa Kateb Jasim
doaj   +1 more source

Estimation of Continuous Distribution of Iterated Fission Probability Using an Artificial Neural Network with Monte Carlo-Based Training Data

Journal of Nuclear Engineering, 2023
The Monte Carlo neutron transport method is used to accurately estimate various quantities, such as k-eigenvalue and integral neutron flux. However, in the case of estimating a distribution of a desired quantity, the Monte Carlo method does not typically
Delgersaikhan Tuya, Yasunobu Nagaya
doaj   +1 more source

Optimal control of a transitional jet using a continuous adjoint method

Computers & Fluids, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Asim Önder, Johan Meyers
openaire   +1 more source

Neural Fields for Highly Accelerated 2D Cine Phase Contrast MRI

Advanced 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, Martin J. Graves, Mary McLean, Carolin Pirkl, Carola‐Bibiane Schönlieb, Timo Schirmer, Florian Wiesinger, Matthias J. Ehrhardt   +7 more
wiley   +1 more source

The Cut-Cell Method for the Conjugate Heat Transfer Topology Optimization of Turbulent Flows Using the “Think Discrete–Do Continuous” Adjoint

Energies
This paper presents a topology optimization (TopO) method for conjugate heat transfer (CHT), with turbulent flows. Topological changes are controlled by an artificial material distribution field (design variables), defined at the cells of a background ...
Nikolaos Galanos, Evangelos M. Papoutsis-Kiachagias, Kyriakos C. Giannakoglou   +2 more
doaj   +1 more source

Exact Discrete Stochastic Simulation With Deep‐Learning‐Scale Gradient Optimization

Advanced Science, EarlyView.
A 203,796‐parameter gene regulatory network classifies handwritten digits with 98.4% accuracy using exact stochastic dynamics. The framework decouples forward simulation from backward differentiation, making continuous‐time Markov chain models compatible with deep‐learning optimization.
Jose M. G. Vilar, Leonor Saiz
wiley   +1 more source

Gradient-Based Aerodynamic Optimization of an Airfoil with Morphing Leading and Trailing Edges

Applied Sciences, 2021
This article presents a gradient-based aerodynamic optimization framework and investigates optimum deformations for a transonic airfoil equipped with morphing leading and trailing edges.
Zhenkai Zhang, Alessandro De Gaspari, Sergio Ricci, Chen Song, Chao Yang   +4 more
doaj   +1 more source

An Adjoint-Based Method for Continuous-Thrust Relative Maneuver Computation in the Restricted Three-Body Problem

2021 American Control Conference (ACC), 2021
A method for computing continuous-thrust maneuvers for relative motion control in the restricted three-body problem (R3BP) is proposed. The maneuvers are computed with respect to a local-vertical local-horizon (LVLH) frame centered at the target. The relative dynamics in such scenario is characterized by time-varying parameters associated to the target
FRANZINI, G., INNOCENTI, M., CASASCO, M.
openaire   +2 more sources

Gap‐Free Information Transfer in 4D‐STEM via Fusion of Complementary Scattering Channels

Advanced Science, EarlyView.
Fused Full‐Field STEM (FF‐STEM) is introduced as a 4D‐STEM imaging modality that combines direct ptychography with tilt‐corrected dark‐field reconstruction in a single acquisition. Fourier‐space fusion using Wiener‐type spectral weighting closes the low‐frequency contrast gap inherent to bright‐field methods, delivering gap‐free, dose‐efficient, near ...
Shengbo You, Georgios Varnavides, Sagar Khavnekar, Nikita Palatkin, Sihan Shao, Mingjian Wu, Daniel Stroppa, Darya Chernikova, Baixu Zhu, Ricardo Egoavil, Stefano Vespucci, Dileep Krishnan, Xingchen Ye, Florian K. M. Schur, Erdmann Spiecker, Philipp Pelz   +15 more
wiley   +1 more source

Adjoint-based calibration of inlet boundary condition for atmospheric computational fluid dynamics solvers [PDF]

Wind Energy Science, 2019
A continuous adjoint solver is developed for calibration of the inlet velocity profile boundary condition (BC) for computational fluid dynamics (CFD) simulations of the neutral atmospheric boundary layer (ABL).
S. Akbarzadeh, H. Kassem, R. Buhr, G. Steinfeld, B. Stoevesandt   +4 more
doaj   +1 more source