no code implementations • 12 Oct 2023 • Teemu Härkönen, Erik M. Vartiainen, Lasse Lensu, Matthew T. Moores, Lassi Roininen
We train two Bayesian neural networks to estimate parameters of the gamma process which can then be used to estimate the underlying Raman spectrum and simultaneously provide uncertainty through the estimation of parameters of a probability distribution.
no code implementations • 26 Aug 2022 • Teemu Härkönen, Sara Wade, Kody Law, Lassi Roininen
Gaussian processes are a key component of many flexible statistical and machine learning models.
no code implementations • 20 Jun 2022 • Sebastian Springer, Aldo Glielmo, Angelina Senchukova, Tomi Kauppi, Jarkko Suuronen, Lassi Roininen, Heikki Haario, Andreas Hauptmann
Thus, here we propose the use of a Dimension reduced Kalman Filter to accumulate information between slices and allow for sufficiently accurate reconstructions for further assessment of the object.
no code implementations • 22 Jul 2020 • Arttu Arjas, Lassi Roininen, Mikko J. Sillanpää, Andreas Hauptmann
Deconvolution is a fundamental inverse problem in signal processing and the prototypical model for recovering a signal from its noisy measurement.
1 code implementation • 28 Jun 2020 • Muhammad Emzir, Sari Lasanen, Zenith Purisha, Lassi Roininen, Simo Särkkä
In this article, we study Bayesian inverse problems with multi-layered Gaussian priors.
Statistics Theory Statistics Theory
no code implementations • 12 Dec 2019 • Petteri Piiroinen, Lassi Roininen, Martin Simon
We construct a data-driven statistical indicator for quantifying the tail risk perceived by the EURGBP option market surrounding Brexit-related events.
no code implementations • 4 Apr 2018 • Karla Monterrubio-Gómez, Lassi Roininen, Sara Wade, Theo Damoulas, Mark Girolami
Gaussian processes are valuable tools for non-parametric modelling, where typically an assumption of stationarity is employed.
Computation
no code implementations • 9 Dec 2016 • Lassi Roininen, Mark Girolami, Sari Lasanen, Markku Markkanen
We introduce non-stationary Mat\'ern field priors with stochastic partial differential equations, and construct correlation length-scaling with hyperpriors.
Statistics Theory Statistics Theory