Results 21 to 30 of about 5,959 (267)
Optimization with multivariate conditional value-at-risk constraints [PDF]
, 2013 For many decision making problems under uncertainty, it is crucial to develop risk-averse models and specify the decision makers' risk preferences based on multiple stochastic performance measures (or criteria). Incorporating such multivariate preference
Noyan, Nilay, Rudolf, Gabor
core +5 more sources
Applied Sciences, 2018 Using Pareto optimization in Multi-Objective Reinforcement Learning (MORL) leads to better learning results for network defense games. This is particularly useful for network security agents, who must often balance several goals when choosing what action
Yang Sun +5 more
doaj +1 more source
Generic scalar potentials in geometric scalar gravity [PDF]
Journal of Theoretical and Applied Physics, 2016 We discuss a generic form of the scalar potential appearing in the geometric scalar theory of gravity. We find the conditions on the potential by considering weak and strong gravity. The modified black hole solutions are obtained for generic potentials and the inverse problems on a black hole and on a spherical body (`pseudo-gravastar') are ...
Nahomi Kan, Kiyoshi Shiraishi
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Horizon curvature and spacetime structure influences on black hole scalarization
European Physical Journal C: Particles and Fields, 2021 Black hole spontaneous scalarization has been attracting more and more attention as it circumvents the well-known no-hair theorems. In this work, we study the scalarization in Einstein–scalar-Gauss–Bonnet theory with a probe scalar field in a black hole ...
Hong Guo +3 more
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Modeling dynamical scalarization with a resummed post-Newtonian expansion [PDF]
, 2016 Despite stringent constraints set by astrophysical observations, there remain viable scalar-tensor theories that could be distinguished from general relativity with gravitational-wave detectors.
Buonanno, Alessandra, Sennett, Noah
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Complex scalar fields in scalar-tensor and scalar-torsion theories
Modern Physics Letters A, 2022 In this paper, we investigate the cosmological dynamics in a spatially flat Friedmann–Lemaître–Robertson–Walker geometry in scalar-tensor and scalar-torsion theories where the nonminimally coupled scalar field is a complex field. We derive the cosmological field equations and we make use of dimensionless variables in order to determine the stationary ...
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Scalar glueball, scalar quarkonia, and their mixing [PDF]
Physical Review D, 2006 The isosinglet scalar mesons $f_0(1710)$, $f_0(1500)$, $f_0(1370)$ and their mixing are studied. We employ two recent lattice results as the starting point; one is the isovector scalar meson $a_0(1450)$ which displays an unusual property of being nearly independent of quark mass for quark masses smaller than that of the strange, and the other is the ...
Cheng, Hai-Yang +2 more
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A review of multi-objective optimization: Methods and its applications
Cogent Engineering, 2018 Several reviews have been made regarding the methods and application of multi-objective optimization (MOO). There are two methods of MOO that do not require complicated mathematical equations, so the problem becomes simple.
Nyoman Gunantara
doaj +1 more source
Spin-induced scalarization and magnetic fields
Physics Letters B, 2022 In the presence of certain non-minimal couplings between a scalar field and the Gauss-Bonnet curvature invariant, Kerr black holes can scalarize, as long as they are spinning fast enough.
Lorenzo Annulli +2 more
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Spontaneous scalarization in generalized scalar-tensor theory [PDF]
Physical Review D, 2019 Spontaneous scalarization is a mechanism that endows relativistic stars and black holes with a nontrivial configuration only when their spacetime curvature exceeds some threshold. The standard way to trigger spontaneous scalarization is via a tachyonic instability at the linear level, which is eventually quenched due to the effect of non-linear terms ...
Andreou, Nikolas +3 more
openaire +2 more sources