Results 91 to 100 of about 2,306,950 (285)

A Thermodynamic 3D Model for the Simulation of Diffusion‐Controlled Alloying Processes in Heterogeneous Material Structures

Advanced Engineering Materials, EarlyView.
A numerical model resulting from irreversible thermodynamics for describing transport processes is introduced, focusing on thermodynamic activity gradients as the actual driving force for diffusion. Implemented in CUDA C++ and using CalPhaD methods for determining the necessary activity data, the model accurately simulates interdiffusion in aluminum ...
Ulrich Holländer, Leonhard Holländer, André Langohr, Hans Jürgen Maier   +3 more
wiley   +1 more source

The Optimal Frequency Control Problem of a Nonlinear Oscillator

Mathematics
We study a minimum-time (time-optimal) control problem for a nonlinear pendulum-type oscillator, in which the control input is the system’s natural frequency constrained to a prescribed interval.
Victor Ilyutko, Dmitrii Kamzolkin, Vladimir Ternovski   +2 more
doaj   +1 more source

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

Fractional optimal control problem for an age-structured model of COVID-19 transmission. [PDF]

Chaos Solitons Fractals, 2021
Khajji B, Kouidere A, Elhia M, Balatif O, Rachik M.   +4 more
europepmc   +1 more source

Numerical solution of optimal control problems with constant control delays [PDF]

We investigate a class of optimal control problems that exhibit constant exogenously given delays in the control in the equation of motion of the differential states.
Johannes P. Schlöder, Ralph Winkler, Sebastian Sager, Ulf Moslener, Ulrich Brandt-Pollmann   +4 more
core  

Darcy-type law associated to an optimal control problem

Electronic Journal of Differential Equations, 2008
The aim of this paper is to study the asymptotic behaviour (homogenization) of an optimal control problem in a periodically perforated domain with Dirichlet condition on the boundary of the holes.
A. K. Nandakumaran, T. Muthukumar
doaj  

Impact of Sustainable Binders Based on Lignin and Collagen on the Volume Stability and Mechanical Properties of MgO‐C Refractories with MgO‐C Recyclates

Advanced Engineering Materials, EarlyView.
Collagen hydrolysate is evaluated as a sustainable binder for MgO‐C refractories. Its thermally induced cross‐linking and gas release lead to expansion and cracking in large bricks, but tailored batches with lignin, recyclates, or fine graphite improve the gas release while thermal treatment and stability.
Till M. J. Stadtmüller, Florian Kerber, Kirsten Moritz, Steffen Dudczig, Konstantin Kraushaar, Thomas Schemmel, Jana Hubálková, Patrick Gehre, Christos G. Aneziris   +8 more
wiley   +1 more source

SUPG-Stabilized Virtual Element Method for Optimal Control Problem Governed by a Convection Dominated Diffusion Equation. [PDF]

Entropy (Basel), 2021
Wang Q, Zhou Z.
europepmc   +1 more source

Quasi-Invariant Optimal Control Problems

, 2003
Partially presented at the Invited Session "Control, Optimization and Computation", 10th Mediterranean Conference on Control and Automation (MED2002), Lisbon, July 9-12, 2002. Accepted for publication (21.Feb.03) in the journal Portugaliae Mathematica.
openaire   +3 more sources

Constraints Optimal Control Problem For Quaternary Nonlinear Elliptic System

Academic Science Journal
This paper is concerned with the study of the constraints quaternary continuous classical optimal control vector problem (CQCCOCVP) with equality and inequality constraint (EINC) controlled by quaternary nonlinear elliptic partial differential equations
Jamil Al-Hawasy, Haider H. Diwan, Waffa F. Keidan   +2 more
doaj   +1 more source