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   Articles with "parametrization" as a keyword



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Matrix‐free crosshole elliptical‐anisotropy tomography: parametrization analysis and ground‐penetrating radar applications in carbonates

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recommendations! Published in 2020 at "Near Surface Geophysics"

DOI: 10.1002/nsg.12116

Abstract: ABSTRACT A novel traveltime tomographic approach is applied to anisotropic media, limited to 2D geometry at present. A general anisotropic Eikonal solver based on a discontinuous Galerkin method is combined with an efficient adjoint formulation… read more here.

Keywords: elliptical anisotropy; penetrating radar; parametrization; ground penetrating ... See more keywords
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Reduced‐precision parametrization: lessons from an intermediate‐complexity atmospheric model

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recommendations! Published in 2020 at "Quarterly Journal of the Royal Meteorological Society"

DOI: 10.1002/qj.3754

Abstract: Reducing numerical precision can save computational costs which can then be reinvested for more useful purposes. This study considers the effects of reducing precision in the parametrizations of an intermediate complexity atmospheric model (SPEEDY). We… read more here.

Keywords: complexity atmospheric; reduced precision; parametrization; model ... See more keywords
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Parametrizing the mesoscale enhancement of oceanic surface turbulent fluxes: A physical–statistical approach

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recommendations! Published in 2022 at "Quarterly Journal of the Royal Meteorological Society"

DOI: 10.1002/qj.4273

Abstract: The mesoscale enhancement of surface turbulent fluxes at the air–sea interface is driven by the mesoscale surface wind‐speed variability, especially the gustiness velocity and the mesoscale wind‐speed standard variation. This study proposes a parametrization of… read more here.

Keywords: surface turbulent; turbulent fluxes; parametrization; mesoscale enhancement ... See more keywords
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Development of ANCF tetrahedral finite elements for the nonlinear dynamics of flexible structures

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recommendations! Published in 2017 at "Nonlinear Dynamics"

DOI: 10.1007/s11071-017-3635-6

Abstract: In this paper, methods for developing isoparametric tetrahedral finite elements (FE) based on the absolute nodal coordinate formulation (ANCF) are presented. The proposed ANCF tetrahedral elements have twelve coordinates per node that include three position… read more here.

Keywords: parametrization; nonlinear dynamics; finite elements; ancf tetrahedral ... See more keywords
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A new method for simultaneous material and topology optimization of composite laminate structures using Hyperbolic Function Parametrization

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recommendations! Published in 2021 at "Composite Structures"

DOI: 10.1016/j.compstruct.2021.114374

Abstract: Abstract This paper presents a new discrete parametrization method for simultaneous topology and material optimization of composite laminate structures, referred to as Hyperbolic Function Parametrization (HFP). The novelty of HFP is the way the candidate… read more here.

Keywords: optimization; hfp; parametrization; topology ... See more keywords
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Robustification and Parametrization of Switching Controllers for a Class of Set Invariance Problems

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recommendations! Published in 2017 at "IFAC-PapersOnLine"

DOI: 10.1016/j.ifacol.2017.08.292

Abstract: Abstract In this paper, we consider the robustification and parametrization of an invariance switching controller with respect to a scalar variable (parameter) that affects the system dynamics. By robustification, we mean searching for a switching… read more here.

Keywords: invariance; parametrization; switching controller; parameter ... See more keywords
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Force Field Parametrization from the Hirshfeld Molecular Electronic Density.

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recommendations! Published in 2018 at "Journal of chemical theory and computation"

DOI: 10.1021/acs.jctc.8b00554

Abstract: The Hirshfeld charges are linearly increased to reproduce the experimental dielectric constant of 10 polar solvents having values between 13 (pyridine) and 182 ( N-methylformamide). The OPLS/AA force field is used to obtain the new… read more here.

Keywords: force field; parametrization; density; new parameters ... See more keywords
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A Posteriori Learning for Quasi‐Geostrophic Turbulence Parametrization

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recommendations! Published in 2022 at "Journal of Advances in Modeling Earth Systems"

DOI: 10.1029/2022ms003124

Abstract: The use of machine learning to build subgrid parametrizations for climate models is receiving growing attention. State‐of‐the‐art strategies address the problem as a supervised learning task and optimize algorithms that predict subgrid fluxes based on… read more here.

Keywords: posteriori learning; parametrization; subgrid parametrizations; quasi geostrophic ... See more keywords
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Parametrizations, weights, and optimal prediction

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recommendations! Published in 2019 at "Communications in Statistics - Theory and Methods"

DOI: 10.1080/03610926.2019.1642489

Abstract: Abstract The goal of the present paper is to predict the future value based on previously observed time series y0, yn which are correlated with the constant trend, i.e. We show that the construction of… read more here.

Keywords: parametrizations weights; parametrization; geometry; prediction ... See more keywords
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On the sensitivity of teleseismic full-waveform inversion to earth parametrization, initial model and acquisition design

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recommendations! Published in 2018 at "Geophysical Journal International"

DOI: 10.1093/gji/ggx480

Abstract: S U M M A R Y Full-waveform inversion (FWI) is not yet a mature imaging technology for lithospheric imaging from teleseismic data. Therefore, its promise and pitfalls need to be assessed more accurately according… read more here.

Keywords: full waveform; parametrization; initial model; model acquisition ... See more keywords
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General parametrization of wormhole spacetimes and its application to shadows and quasinormal modes

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recommendations! Published in 2021 at "Physical Review D"

DOI: 10.1103/physrevd.103.124062

Abstract: The general parametrization for spacetimes of spherically symmetric Lorentzian, traversable wormholes in an arbitrary metric theory of gravity is presented. The parametrization is similar in spirit to the post-Newtonian parametrized formalism, but with validity that… read more here.

Keywords: parametrization wormhole; shadows quasinormal; parametrization; wormhole spacetimes ... See more keywords