| |
|
We perform direct numerical simulations of an unstably stratified turbulent channel flow to address the effects of buoyancy on the boundary layer dynamics and mean field quantities. We systematically span a range of parameters in the space of friction Reynolds number (Re<inf>?</inf>)and… |
| |
|
|
| |
|
We consider 2D discrete systems, described by scalar functions and governed by periodic interaction potentials. We focus on anisotropic nearest neighbors interactions in the hexagonal lattice and on isotropic long range interactions in the square lattice. In both these cases, we perform a complete… |
| |
|
Direct numerical approximation of a continuous-time infinite horizon control problem, requires to recast the model as a discrete-time, finite-horizon control model. The quality of the optimization results can be heavily degraded if the discretization process does not take into account features of… |
| |
|
We consider explicit symplectic partitioned Runge-Kutta (ESPRK) methods for the numerical integration of non-autonomous dynamical systems. It is known that, in general, the accuracy of a numerical method can diminish considerably whenever an explicit time dependence enters the differential… |
| |
|
|
| |
|
The paper deals with a special filtered approximation method, which originates interpolation polynomials at Chebyshev zeros by using de la Vallée Poussin filters. In order to get an optimal approximation in spaces of locally continuous functions equipped with weighted uniform norms, the related… |
| |
|
|
| |
|
Heat exchange between a conducting plate and the environment is described
here by means of an unknown nonlinear function F of the temperature u. In
this paper we construct a method for recovering F by means of polynomial
expansion, perturbation theory and the toolbox of thermal inverse problems.
We… |
| |
|
Accurate quantitation of Magnetic Resonance Spectroscopy (MRS) signals is an essential step before converting the estimated
signal parameters, such as frequencies, damping factors, and amplitudes, into biochemical quantities (concentration, pH). Several
subspace-based parameter estimators have been… |
