Results 21 to 30 of about 393,171 (263)
Two Multi-Sigmoidal Diffusion Models for the Study of the Evolution of the COVID-19 Pandemic
Mathematics, 2021 A proposal is made to employ stochastic models, based on diffusion processes, to represent the evolution of the SARS-CoV-2 virus pandemic. Specifically, two diffusion processes are proposed whose mean functions obey multi-sigmoidal Gompertz and Weibull ...
Antonio Barrera +3 more
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Fractal and Fractional, 2019 New aspects of electron transport in quantum wires with Lévy-type disorder are described. We study the weak scattering and the incoherent sequential tunneling in one-dimensional quantum systems characterized by a tempered Lévy stable ...
Renat T. Sibatov, HongGuang Sun
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DIFFUSION PROCESSES AND COHERENT STATES [PDF]
Modern Physics Letters B, 1994 It is shown that uncertanity relations, as well as coherent and squeezed states, are structural properties of stochastic processes with Fokker–Planck dynamics. The quantum mechanical coherent and squeezed states are explicitly constructed via Nelson stochastic quantization.
DE MARTINO, Salvatore +3 more
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Parametric Estimation of Diffusion Processes: A Review and Comparative Study
Mathematics, 2021 This paper provides an in-depth review about parametric estimation methods for stationary stochastic differential equations (SDEs) driven by Wiener noise with discrete time observations.
Alejandra López-Pérez +2 more
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ANOVA for diffusions and Itô processes [PDF]
The Annals of Statistics, 2006 Itô processes are the most common form of continuous semimartingales, and include diffusion processes. This paper is concerned with the nonparametric regression relationship between two such Itô processes. We are interested in the quadratic variation (integrated volatility) of the residual in this regression, over a unit of time (such as a day). A main
Mykland, Per Aslak, Zhang, Lan
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Crystals, 2022 This work compares the tribological behavior of surface layers obtained by three different hardening processes. The layers were formed on the surface of AISI 4140 steel by applying three different thermochemical treatments.
Pablo Alfredo Ruiz-Trabolsi +6 more
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Discrete Dynamics in Nature and Society, 2001 We revise the interrelations between the classical Black Scholes equation, the diffusion equation and Burgers equation. Some of the algebraic properties the diffusion equation shows are elaborated and qualitatively presented.
Andreas Ruffing +2 more
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Investigating Peer and Sorting Effects within an Adaptive Multiplex Network Model
Games, 2019 Individuals have a strong tendency to coordinate with all their neighbors on social and economics networks. Coordination is often influenced by intrinsic preferences among the available options, which drive people to associate with similar peers, i.e ...
Francesca Lipari +2 more
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Mixed Similarity Diffusion for Recommendation on Bipartite Networks
IEEE Access, 2017 In recommender systems, collaborative filtering technology is an important method to evaluate user preference through exploiting user feedback data, and has been widely used in industrial areas.
Ximeng Wang +5 more
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On the Importance of Electron Diffusion in a Bulk-Matter Test of the Pauli Exclusion Principle
Entropy, 2018 The VIolation of Pauli (VIP) experiment (and its upgraded version, VIP-2) uses the Ramberg and Snow (RS) method (Phys. Lett. B 1990, 238, 438) to search for violations of the Pauli exclusion principle in the Gran Sasso underground laboratory.
Edoardo Milotti +25 more
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