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Publications associées (119)
Anomalous Dissipation and Lack of Selection in the Obukhov-Corrsin Theory of Scalar Turbulence
Maria Colombo, Massimo Sorella
The Obukhov-Corrsin theory of scalar turbulence [21, 54] advances quantitative predictions on passive-scalar advection in a turbulent regime and can be regarded as the analogue for passive scalars of Kolmogorov's K41 theory of fully developed turbulence [4 ...
London2023An Efficient Sampling Algorithm for Non-smooth Composite Potentials
Nicolas Henri Bernard Flammarion
We consider the problem of sampling from a density of the form p(x) ? exp(-f (x) - g(x)), where f : Rd-+ R is a smooth function and g : R-d-+ R is a convex and Lipschitz function. We propose a new algorithm based on the Metropolis-Hastings framework. Under ...
MICROTOME PUBL2022Sparse non-negative super-resolution - simplified and stabilised
We consider the problem of non-negative super-resolution, which concerns reconstructing a non-negative signal x = Sigma(k )(i=1)a(i)delta(ti) from m samples of its convolution with a window function phi(s - t), of the form y(s(j)) = Sigma(k)(i=1) a(i) phi( ...
ACADEMIC PRESS INC ELSEVIER SCIENCE2021Coarse graining and large-N behavior of the d-dimensional N-clock model
We study the asymptotic behavior of the N-clock model, a nearest neighbors ferromagnetic spin model on the d-dimensional cubic epsilon-lattice in which the spin field is constrained to take values in a discretization S-N of the unit circle S-1 consisting o ...
2021Sparsest piecewise-linear regression of one-dimensional data
Michaël Unser, Julien René Pierre Fageot, Thomas Jean Debarre, Quentin Alain Denoyelle
We study the problem of one-dimensional regression of data points with total-variation (TV) regularization (in the sense of measures) on the second derivative, which is known to promote piecewise-linear solutions with few knots. While there are efficient a ...
Elsevier2021