Zobrazeno 1 - 10
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pro vyhledávání: '"Ulander, A."'
Boundary-preserving weak approximations of some semilinear stochastic partial differential equations
Autor:
Ulander, Johan
We propose and analyse a boundary-preserving numerical scheme for the weak approximations of some stochastic partial differential equations (SPDEs) with bounded state-space. We impose regularity assumptions on the drift and diffusion coefficients onl
Externí odkaz:
http://arxiv.org/abs/2412.10800
Autor:
Ulander, Johan
We develop the novel method of artificial barriers for scalar stochastic differential equations (SDEs) and use it to construct boundary-preserving numerical schemes for strong approximations of scalar SDEs, possibly with non-globally Lipschitz drift
Externí odkaz:
http://arxiv.org/abs/2410.04850
Autor:
Ankel, Martin, Jonsson, Robert S., Tholen, Mats, Bryllert, Tomas, Ulander, Lars M. H., Delsing, Per
Publikováno v:
2023 20th European Radar Conference (EuRAD) (pp. 213-216). IEEE
In this article, the effect a moving target has on the signal-to-interference-plus-noise-ratio (SINR) for high time-bandwidth noise radars is investigated. To compensate for cell migration we apply a computationally efficient stretch processing algor
Externí odkaz:
http://arxiv.org/abs/2405.01023
Autor:
Ulander, Johan
We propose and analyse boundary-preserving schemes for the strong approximations of some scalar SDEs with non-globally Lipschitz drift and diffusion coefficients whose state-space is bounded. The schemes consists of a Lamperti transform followed by a
Externí odkaz:
http://arxiv.org/abs/2308.04075
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 8, Pp 1217-1234 (2024)
Abstract A method is proposed for reconstructing an Orthogonal Frequency Division Multiplexing (OFDM) signal that contains data gaps, with the aim to improve demodulation. The main objective is to use the method in a passive radar application with mi
Externí odkaz:
https://doaj.org/article/d95188e9f1234c0eb2320827d3bd026b
We introduce a positivity-preserving numerical scheme for a class of nonlinear stochastic heat equations driven by a purely time-dependent Brownian motion. The construction is inspired by a recent preprint by the authors where one-dimensional equatio
Externí odkaz:
http://arxiv.org/abs/2304.11064
We construct a positivity-preserving Lie--Trotter splitting scheme with finite difference discretization in space for approximating the solutions to a class of nonlinear stochastic heat equations with multiplicative space-time white noise. We prove t
Externí odkaz:
http://arxiv.org/abs/2302.08858
Autor:
Elzana Odzakovic, Monika Allgurin, Lise-Lotte Jonasson, Sandra Öberg, Bengt Fridlund, Martin Ulander, Jonas Lind, Anders Broström
Publikováno v:
International Journal of Qualitative Studies on Health & Well-Being, Vol 19, Iss 1 (2024)
Purpose Restless Legs Syndrome (RLS) is a widespread condition that affects sleep leading to daytime sleepiness, depression, and reduced quality of life. This study aims to determine and describe how patients with RLS experience their everyday life,
Externí odkaz:
https://doaj.org/article/85ae1310359b4233a7aa2c862e6f4785
Publikováno v:
IET Radar, Sonar & Navigation, Vol 18, Iss 7, Pp 1002-1013 (2024)
Abstract The utilisation of continuous random waveforms for radar, that is, noise radar, has been extensively studied as a candidate for low probability of intercept operation. However, compared with the more traditional pulse‐Doppler radar, noise
Externí odkaz:
https://doaj.org/article/d867e975642545228e5210ca33f70c56
Autor:
Grote, Ludger a, b, ⁎, Jonzon, Yvonne Asp c, Barta, Peter d, Murto, Tarmo e, Nilsson, Zarita f, Nygren, Anna g, Theorell-Haglöw, Jenny h, Sunnergren, Ola i, j, Ulander, Martin k, l, Ekström, Magnus m, Palm, Andreas h, Hedner, Jan a, b
Publikováno v:
In Sleep Medicine December 2024 124:362-370