repositories = "BIRD: BCAM's Institutional Repository Data"

Encontrado 976 documentos, página mostrada 1 de 98

Computational cost of isogeometric multi-frontal solvers on parallel distributed memory machines

Description: This paper derives theoretical estimates of the computational cost for isogeometric multi-frontal direct solver executed on parallel distributed memory machines. We show theoretically that for the $C^{p-1}$ global continuity of the isogeometric solution, both the computational cost and the communica...
Language(s): Inglés

Improved fractional Poincaré type inequalities in John domains

Description: We obtain improved fractional Poincaré inequalities in John domains of a metric space $(X, d)$ endowed with a doubling measure $\mu$ under some mild regularity conditions on the measure $\mu$. We also give sufficient conditions on a bounded domain to support fractional Poincaré type inequalities i...
Language(s): Inglés

Modified Hamiltonian Monte Carlo for Bayesian Inference

Description: The Hamiltonian Monte Carlo (HMC) method has been recognized as a powerful sampling tool in computational statistics. We show that performance of HMC can be significantly improved by incorporating importance sampling and an irreversible part of the dynamics into a chain. This is achieved by replacin...
Language(s): Inglés

On the propagation of nonlinear transients of temperature and pore pressure in a thin porous boundary layer between two rocks.

Description: The dynamics of transients of fluid-rock temperature, pore pressure, pollutants in porous rocks are of vivid interest for fundamental problems in hydrological, volcanic, hydrocarbon systems, deep oil drilling. This can concern rapid landslides or the fault weakening during coseismic slips and also a...
Language(s): Inglés

Hypocoercivity of linear kinetic equations via Harris's Theorem

Description: We study convergence to equilibrium of the linear relaxation Boltzmann (also known as linear BGK) and the linear Boltzmann equations either on the torus $(x,v) \in \mathbb{T}^d \times \mathbb{R}^d$ or on the whole space $(x,v) \in \mathbb{R}^d \times \mathbb{R}^d$ with a confining potential. We pres...
Language(s): Inglés

On the absolute divergence of Fourier series in the infinite dimensional torus

Author(s): Fernández E. , Roncal L.
Description: In this note we present some simple counterexamples, based on quadratic forms in infinitely many variables, showing that the implication $f\in C^{(\infty}(\mathbb{T}^\omega)\Longrightarrow\sum_{\bar{p}\in\mathbb{Z}^\infty}|\widehat{f}(\bar{p})|<\infty$ is false. There are functions of the class $C^{...
Language(s): Inglés

$A_1$ theory of weights for rough homogeneous singular integrals and commutators

Description: Quantitative $A_1-A_\infty$ estimates for rough homogeneous singular integrals $T_{\Omega}$ and commutators of $\BMO$ symbols and $T_{\Omega}$ are obtained. In particular the following estimates are proved: \[ \|T_\Omega \|_{L^p(w)}\le c_{n,p}\|\Omega\|_{L^\infty} [w]_{A_1}^{\frac{1}{p}}\,[w]_{A_{\...
Language(s): Inglés

Reduced description method in the kinetic theory of Brownian motion with active fluctuations

Description: We develop a microscopic approach to the kinetic theory of many-particle systems with dissipative and potential interactions in presence of active fluctuations. The approach is based on a generalization of Bogolyubov–Peletminskii reduced description method applied to the systems of many active parti...
Language(s): Inglés

A mathematical analysis of edas with distance-based exponential models

Description: Estimation of Distribution Algorithms have been successfully used for solving many combinatorial optimization problems. One type of problems in which Estimation of Distribution Algorithms have presented strong competitive results are permutation-based combinatorial optimization problems. In this cas...
Language(s): Inglés

Variational Formulations for Explicit Runge-Kutta Methods

Description: Variational space-time formulations for partial di fferential equations have been of great interest in the last decades, among other things, because they allow to develop mesh-adaptive algorithms. Since it is known that implicit time marching schemes have variational structure, they are often employ...
Language(s): Inglés

Encontrado 976 documentos, página mostrada 1 de 98

Uso de cookies: Este sitio web utiliza cookies propias y de terceros para dar un mejor servicio. Si continúa navegando se considera que acepta su uso. OKMás información