Results 41 to 50 of about 4,125 (123)

A constrained scheme for Einstein equations based on Dirac gauge and spherical coordinates

open access: yes, 2003
We propose a new formulation for 3+1 numerical relativity, based on a constrained scheme and a generalization of Dirac gauge to spherical coordinates.
A. Lichnerowicz   +13 more
core   +1 more source

Kinematics of Multigrid Monte Carlo

open access: yes, 1992
We study the kinematics of multigrid Monte Carlo algorithms by means of acceptance rates for nonlocal Metropolis update proposals. An approximation formula for acceptance rates is derived. We present a comparison of different coarse-to-fine interpolation
A. S. Kronfeld   +26 more
core   +1 more source

Efficient Real Space Solution of the Kohn-Sham Equations with Multiscale Techniques

open access: yes, 1999
We present a multigrid algorithm for self consistent solution of the Kohn-Sham equations in real space. The entire problem is discretized on a real space mesh with a high order finite difference representation. The resulting self consistent equations are
Beck, Thomas L., Wang, Jian
core   +2 more sources

Initial Conditions for Numerical Relativity -- Introduction to numerical methods for solving elliptic PDEs

open access: yes, 2013
Numerical relativity became a powerful tool to investigate the dynamics of binary problems with black holes or neutron stars as well as the very structure of General Relativity.
Okawa, Hirotada
core   +1 more source

A Real-Space Full Multigrid study of the fragmentation of Li11+ clusters

open access: yes, 1998
We have studied the fragmentation of Li11+ clusters into the two experimentally observed products (Li9+,Li2) and (Li10+,Li) The ground state structures for the two fragmentation channels are found by Molecular Dynamics Simulated Annealing in the ...
A. Brandt   +40 more
core   +1 more source

Multilinear Wavelets: A Statistical Shape Space for Human Faces

open access: yes, 2014
We present a statistical model for $3$D human faces in varying expression, which decomposes the surface of the face using a wavelet transform, and learns many localized, decorrelated multilinear models on the resulting coefficients.
A. Salazar   +15 more
core   +1 more source

Phase field modeling and computation of vesicle growth or shrinkage. [PDF]

open access: yesJ Math Biol, 2023
Tang X, Li S, Lowengrub JS, Wise SM.
europepmc   +1 more source

Convergence Analysis of the Fast Subspace Descent Methods for Convex Optimization Problems

open access: yes, 2019
The full approximation storage (FAS) scheme is a widely used multigrid method for nonlinear problems. In this paper, a new framework to design and analyze FAS-like schemes for convex optimization problems is developed.
Chen, Long, Hu, Xiaozhe, Wise, Steven M.
core  

Infinite-Dimensional Adaptive Boundary Observer for Inner-Domain Temperature Estimation of 3D Electrosurgical Processes using Surface Thermography Sensing. [PDF]

open access: yesProc IEEE Conf Decis Control, 2022
El-Kebir H   +5 more
europepmc   +1 more source

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