Results 11 to 20 of about 3,983 (122)
Winter Subtropical Highs, the Hadley Circulation and Baroclinic Instability
Journal of Geophysical Research: Atmospheres, Volume 128, Issue 22, 27 November 2023., 2023 Abstract Subtropical highs have a profound influence on the weather and climate of adjacent continents. In this study, we use reanalysis data to investigate the interannual variability and trends in winter subtropical highs from 1979 to 2021. We find dynamical relationships between subtropical high intensity, the Hadley and Ferrel Circulation intensity,
Weiteng Qiu +2 more
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Poisson Manifold Reconstruction — Beyond Co‐dimension One
Computer Graphics Forum, Volume 42, Issue 5, August 2023., 2023 Abstract Screened Poisson Surface Reconstruction creates 2D surfaces from sets of oriented points in 3D (and can be extended to co‐dimension one surfaces in arbitrary dimensions). In this work we generalize the technique to manifolds of co‐dimension larger than one.
M. Kohlbrenner +3 more
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Computer Graphics Forum, Volume 42, Issue 2, Page 309-320, May 2023., 2023 Abstract The humble loop shrinking property played a central role in the inception of modern topology but it has been eclipsed by more abstract algebraic formalisms. This is particularly true in the context of detecting relevant non‐contractible loops on surfaces where elaborate homological and/or graph theoretical constructs are favored in algorithmic
A. Weinrauch +4 more
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Numerical Linear Algebra with Applications, Volume 29, Issue 4, August 2022., 2022 Abstract Topology optimization aims to find the best material layout subject to given constraints. The so‐called material distribution methods cast the governing equation as an extended or fictitious domain problem, in which a coefficient field represents the design. When solving the governing equation using the finite element method, a large number of
Quoc Khanh Nguyen +3 more
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ARGOS: An adaptive refinement goal‐oriented solver for the linearized Poisson–Boltzmann equation
Journal of Computational Chemistry, Volume 42, Issue 26, Page 1832-1860, October 5, 2021., 2021 An adaptive refinement goal oriented solver (ARGOS) of the linearized Poisson–Boltzmann equation for the calculation of the electrostatic interaction between molecules is developed and tested. It can efficiently handle discontinuous dielectric coefficients, singular charge densities, and the complicated geometry of molecular domains in three spatial ...
Svetoslav Nakov +3 more
wiley +1 more source
A stochastic approach for automated brain MRI segmentation
IET Image Processing, Volume 15, Issue 3, Page 735-745, February 2021., 2021 Abstract This paper presents an approach to segment lesions from brain magnetic resonance images in a fully automatic manner. The proposed idea leverages the strength of classical random walker algorithm and graph cut optimization technique in a single framework.
Pubali Chatterjee +2 more
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An Improved Fractional‐Order Variational Optical Flow Model Combining Structure Tensor
Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021 Dealing with problems of illumination changes in optical flow estimation, an improved variational optical flow model is proposed in this paper. The local structure constancy constraint (LSCC) is applied in the data term of the traditional HS (Horn & Schunck) optical flow model to substitute the brightness constancy constraint.
Bin Zhu +6 more
wiley +1 more source
The close limit of colliding black holes: an update [PDF]
, 1999 This is the writeup of the talk I gave at the Yukawa International Symposium at Kyoto, Japan on June 29, 1999. The talk summarizes the present status of the close limit approximation for colliding black holes.Comment: LaTeX with PTP macros, 8 figures, 14
Pullin, Jorge
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Preconditioned fully implicit PDE solvers for monument conservation [PDF]
, 2010 Mathematical models for the description, in a quantitative way, of the damages induced on the monuments by the action of specific pollutants are often systems of nonlinear, possibly degenerate, parabolic equations. Although some the asymptotic properties
Berger A. E. +3 more
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New conformally flat initial data for spinning black holes [PDF]
, 2002 We obtain an explicit solution of the momentum constraint for conformally flat, maximal slicing, initial data which gives an alternative to the purely longitudinal extrinsic curvature of Bowen and York.
Dain, S., Lousto, C. O., Takahashi, R.
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