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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
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Optimization and Optimizers for Adversarial Robustness
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
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Constrained ear decompositions in graphs and digraphs [PDF]
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
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Optimal Solvers for PDE-Constrained Optimization [PDF]
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
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9 pages, 4 figures. Accompanying paper of arXiv:2111.12130.
Kamil Korzekwa, Matteo Lostaglio
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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
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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
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Development of spatially variant photonic crystals to control light in the near-infrared spectrum
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
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Optimal growth and Pareto optimality [PDF]
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
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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
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