no code implementations • 31 Dec 2023 • Giulia Bertaglia, Lorenzo Pareschi, Giuseppe Toscani
The temporal evolution of a contagious viral disease is modelled as the dynamic progression of different classes of population with individuals interacting pairwise.
no code implementations • 30 Nov 2022 • Lorenzo Pareschi, Giuseppe Toscani
The Luria--Delbr\"uck mutation model is a cornerstone of evolution theory and has been mathematically formulated in a number of ways.
no code implementations • 25 Jun 2022 • Giulia Bertaglia, Chuan Lu, Lorenzo Pareschi, Xueyu Zhu
To allow the neural network to operate uniformly with respect to the small scales, it is desirable that the neural network satisfies an Asymptotic-Preservation (AP) property in the learning process.
no code implementations • 1 Oct 2021 • Giacomo Albi, Giulia Bertaglia, Walter Boscheri, Giacomo Dimarco, Lorenzo Pareschi, Giuseppe Toscani, Mattia Zanella
In this survey we report some recent results in the mathematical modeling of epidemic phenomena through the use of kinetic equations.
no code implementations • 14 Jun 2021 • Giulia Bertaglia, Walter Boscheri, Giacomo Dimarco, Lorenzo Pareschi
Because of the high uncertainty in the data reported in the early phase of the epidemic, the presence of random inputs in both the initial data and the epidemic parameters is included in the model.
no code implementations • 9 Jun 2021 • Giacomo Albi, Lorenzo Pareschi, Mattia Zanella
After the introduction of drastic containment measures aimed at stopping the epidemic contagion from SARS-CoV2, many governments have adopted a strategy based on a periodic relaxation of such measures in the face of a severe economic crisis caused by lockdowns.
no code implementations • 29 May 2021 • Giulia Bertaglia, Lorenzo Pareschi
The importance of spatial networks in the spread of an epidemic is an essential aspect in modeling the dynamics of an infectious disease.
no code implementations • 4 Feb 2021 • Lorenzo Pareschi, Torsten Trimborn, Mattia Zanella
In this paper, we extend a recently introduced multi-fidelity control variate for the uncertainty quantification of the Boltzmann equation to the case of kinetic models arising in the study of multiagent systems.
Numerical Analysis Statistical Mechanics Numerical Analysis Adaptation and Self-Organizing Systems
no code implementations • 10 Dec 2020 • Sara Grassi, Lorenzo Pareschi
A regularization process for the global best permits to formally derive the respective mean-field description.
1 code implementation • 31 Jan 2020 • Massimo Fornasier, Hui Huang, Lorenzo Pareschi, Philippe Sünnen
To quantify the performances of the new approach, we show that the algorithm is able to perform essentially as good as ad hoc state of the art methods in challenging problems in signal processing and machine learning, namely the phase retrieval problem and the robust subspace detection.
no code implementations • 31 Jan 2020 • Massimo Fornasier, Hui Huang, Lorenzo Pareschi, Philippe Sünnen
We introduce a new stochastic differential model for global optimization of nonconvex functions on compact hypersurfaces.