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of 1 391
pro vyhledávání: '"Espanol P."'
We combine experiments in a von K\'arm\'an flow with numerical simulations of Taylor-Green and homogeneous and isotropic turbulence to study the effect of the local flow geometry on particle pair dispersion. To characterize particle dispersion we use
Externí odkaz:
http://arxiv.org/abs/2412.12334
Autor:
Simavilla, David Nieto, Bonfanti, Andrea, de Beristain, Imanol García, Español, Pep, Ellero, Marco
We present a versatile framework that employs Physics-Informed Neural Networks (PINNs) to discover the entropic contribution that leads to the constitutive equation for the extra-stress in rheological models of polymer solutions. In this framework th
Externí odkaz:
http://arxiv.org/abs/2409.07545
We consider an $\ell_1$-regularized inverse problem where both the forward and regularization operators have a Kronecker product structure. By leveraging this structure, a joint decomposition can be obtained using generalized singular value decomposi
Externí odkaz:
http://arxiv.org/abs/2409.00883
$\ell_1$ regularization is used to preserve edges or enforce sparsity in a solution to an inverse problem. We investigate the Split Bregman and the Majorization-Minimization iterative methods that turn this non-smooth minimization problem into a sequ
Externí odkaz:
http://arxiv.org/abs/2404.19156
Intrinsic thermal fluctuations within a real solid challenge the rigid body assumption that is central to Euler's equations for the motion of a free body. Recently, we have introduced a dissipative and stochastic version of Euler's equations in a the
Externí odkaz:
http://arxiv.org/abs/2404.16613
Autor:
Español, Malena I., Jeronimo, Gabriela
Variable projection methods prove highly efficient in solving separable nonlinear least squares problems by transforming them into a reduced nonlinear least squares problem, typically solvable via the Gauss-Newton method. When solving large-scale sep
Externí odkaz:
http://arxiv.org/abs/2402.08568
Autor:
de la Torre, J. A., Español, Pep
The phenomenon known as the tennis racket effect is observed when a rigid body experiences unstable rotation around its intermediate axis. In free space, this leads to the Dzhanibekov effect, where triaxial objects like a spinning wing bolt may conti
Externí odkaz:
http://arxiv.org/abs/2312.15448
The motion of a rigid body is described in Classical Mechanics with the venerable Euler's equations which are based on the assumption that the relative distances among the constituent particles are fixed in time. Real bodies, however, cannot satisfy
Externí odkaz:
http://arxiv.org/abs/2303.15295
Autor:
Breckling, Sean, Español, Malena I., Uribe, Victoria, Bobmara, Chrisitan, Pillow, Jordan, Baldonado, Brandon
We present a note on the implementation and efficacy of a box-constrained $L_1/L_2$ regularization in numerical optimization approaches to performing tomographic reconstruction from a single projection view. The constrained $L_1/L_2$ minimization pro
Externí odkaz:
http://arxiv.org/abs/2303.08292
Publikováno v:
Phys. Rev. E 107, 024217 (2023)
Krylov complexity is a novel approach to study how an operator spreads over a specific basis. Recently, it has been stated that this quantity has a long-time saturation that depends on the amount of chaos in the system. Since this quantity not only d
Externí odkaz:
http://arxiv.org/abs/2212.06619