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

Encontrado 926 documentos, página mostrada 1 de 93

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

Direct solvers performance on h-adapted grids

Description: We analyse the performance of direct solvers when applied to a system of linear equations arising from an $h$-adapted, $C^0$ finite element space. Theoretical estimates are derived for typical $h$-refinement patterns arising as a result of a point, edge, or face singularity as well as boundary layer...
Language(s): Inglés

Fractional Laguerre spectral methods and their applications to fractional differential equations on unbounded domain

Description: In this article, we first introduce a singular fractional Sturm-Liouville problem (SFSLP) on unbounded domain. The associated fractional differential operator is both Weyl and Caputo type. The properties of spectral data for fractional operator on unbounded domain have been investigated. Moreover, i...
Language(s): Inglés

Stabilized dual-mixed method for the problem of linear elasticity with mixed boundary conditions

Author(s): Gonzalez M.
Description: We extend the applicability of the augmented dual-mixed method introduced recently in Gatica (2007), Gatica et al. (2009) to the problem of linear elasticity with mixed boundary conditions. The method is based on the Hellinger-Reissner principle and the symmetry of the stress tensor is imposed in a ...
Language(s): Inglés

High-accuracy adaptive modeling of the energy distribution of a meniscus-shaped cell culture in a Petri dish

Description: Cylindrical Petri dishes embedded in a rectangular waveguide and exposed to a polarized electromagnetic wave are often used to grow cell cultures. To guarantee the success of these cultures, it is necessary to enforce that the specific absorption rate distribution is sufficiently high and uniform ov...
Language(s): Inglés

Multi-objective hierarchic memetic solver for inverse parametric problems

Description: We propose a multi-objective approach for solving challenging inverse parametric problems. The objectives are misfits for several physical descriptions of a phenomenon under consideration, whereas their domain is a common set of admissible parameters. The resulting Pareto set, or parameters close to...
Language(s): Inglés

Semi-analytical response of acoustic logging measurements in frequency domain

Description: This work proposes a semi-analytical method for simulation of the acoustic response of multipole eccentered sources in a fluid-filled borehole. Assuming a geometry that is invariant with respect to the azimuthal and vertical directions, the solution in frequency domain is expressed in terms of a Fou...
Language(s): Inglés

The Modellers' Halting Foray into Ecological Theory: Or, What is This Thing Called 'Growth Rate'?

Description: This discussion paper describes the attempt of an imagined group of non-ecologists ("Modellers" ) to determine the population growth rate from field data. The Modellers wrestle with the multiple definitions of the growth rate available in the literature and the fact that, in their modelling, it appe...
Language(s): Inglés

Towards efficient 5-axis flank CNC machining of free-form surfaces via fitting envelopes of surfaces of revolution

Description: We introduce a new method that approximates free-form surfaces by envelopes of one-parameter motions of surfaces of revolution. In the context of 5-axis computer numerically controlled (CNC) machining, we propose a flank machining methodology which is a preferable scallop-free scenario when the mill...
Language(s): Inglés

Optimal quadrature rules for odd-degree spline spaces and their application to tensor-product-based isogeometric analysis

Author(s): Bartoň M. , Calo V.M.
Description: We introduce optimal quadrature rules for spline spaces that are frequently used in Galerkin discretizations to build mass and stiffness matrices. Using the homotopy continuation concept (Barton and Calo, 2016) that transforms optimal quadrature rules from source spaces to target spaces, we derive o...
Language(s): Inglés

Encontrado 926 documentos, página mostrada 1 de 93

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