Results 21 to 30 of about 2,429,878 (317)

Analysis of Wellhead Uplift in Offshore Thermal Recovery by Using Finite Element Numerical Simulation

open access: yesJournal of Engineering, 2018
Pilot test of complex thermal fluid recovery technology was conducted in NB35-2 heavy oil field. Wellhead uplift was detected among some oil wells, and development of offshore thermal recovery technology could be restricted by the serious safety problems
Shexia Dong   +4 more
doaj   +1 more source

Optimization and Optimizers for Adversarial Robustness

open access: yesCoRR, 2023
Empirical robustness evaluation (RE) of deep learning models against adversarial perturbations entails solving nontrivial constrained optimization problems. Existing numerical algorithms that are commonly used to solve them in practice predominantly rely on projected gradient, and mostly handle perturbations modeled by the $\ell_1$, $\ell_2$ and $\ell_\
Hengyue Liang   +5 more
openaire   +2 more sources

Constrained ear decompositions in graphs and digraphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2019
Ear decompositions of graphs are a standard concept related to several major problems in graph theory like the Traveling Salesman Problem. For example, the Hamiltonian Cycle Problem, which is notoriously N P-complete, is equivalent to deciding whether a ...
Frédéric Havet, Nicolas Nisse
doaj   +1 more source

Optimal Solvers for PDE-Constrained Optimization [PDF]

open access: yesSIAM Journal on Scientific Computing, 2010
Optimization problems with constraints which require the solution of a partial differential equation arise widely in many areas of the sciences and engineering, in particular in problems of design. The solution of such PDE-constrained optimization problems is usually a major computational task.
Tyrone Rees   +2 more
openaire   +4 more sources

Optimizing Thermalization

open access: yesPhysical Review Letters, 2022
9 pages, 4 figures. Accompanying paper of arXiv:2111.12130.
Kamil Korzekwa, Matteo Lostaglio
openaire   +6 more sources

Identification of tyrosine sulfation in the variable region of a bispecific antibody and its effect on stability and biological activity

open access: yesmAbs, 2023
Despite tyrosine sulfation being a relatively common post-translational modification (PTM) on the secreted proteins of higher eukaryotic organisms, there have been surprisingly few reports of this modification occurring in recombinant monoclonal ...
Christopher B. Lietz   +8 more
doaj   +1 more source

Rapid and reliable re-design of miniaturized microwave passives by means of concurrent parameter scaling and intermittent local tuning

open access: yesScientific Reports, 2023
Re-design of microwave passive components for the assumed operating frequencies or substrate parameters is an important yet a tedious process. It requires simultaneous tuning of relevant circuit variables, often over broad ranges thereof, to ensure ...
Slawomir Koziel   +1 more
doaj   +1 more source

Development of spatially variant photonic crystals to control light in the near-infrared spectrum

open access: yesScientific Reports, 2022
Spatially Variant Photonic Crystals (SVPCs) have shown the ability to control the propagation and direction of light in the near-infrared spectrum. Using a novel approach for simplified modeling and fabrication techniques, we designed unique, spatially ...
Andrew Volk   +5 more
doaj   +1 more source

Optimal growth and Pareto optimality [PDF]

open access: yesJournal of Mathematical Economics, 1991
Using the McKenzie-Montrucchio approach to optimal growth problems the authors show that in a stationary intertemporal economy with discrete infinite time span and recursive utilities for each of a finite numbers of agents, every Pareto optimum solution is a solution to a generalized McKenzie problem.
Dana Rose-anne, Le Van Cuong
openaire   +1 more source

Study on Synergistic Effect of Directional Chemical Reaction⁃Assisted SAGD under Three⁃Dimensional Physical Simulationon

open access: yesShiyou huagong gaodeng xuexiao xuebao
In the process of heavy oil thermal recovery using SAGD (Steam⁃Assisted Gravity Drainage) technology, conventional thermal recovery boilers are mainly used for heat generation.
Tao LIN   +4 more
doaj   +1 more source

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