10 citations · 18 across the 11 of their papers we have counts for
13 papers
Compound Krylov subspace methods for parametric linear systems
Antti Autio, Antti Hannukainen
In this work, we propose a reduced basis method for efficient solution of parametric linear systems. The coefficient matrix is assumed to be a linear matrix-valued function that is…
Distributed solution of Laplacian eigenvalue problems
Antti Hannukainen, Jarmo Malinen, Antti Ojalammi
The purpose of this article is to approximately compute the eigenvalues of the symmetric Dirichlet Laplacian within an interval . A novel domain decomposition Ritz method, p…
Inverse heat source problem and experimental design for determining iron loss distribution
Antti Hannukainen, Nuutti Hyvönen, Lauri Perkkiö
Iron loss determination in the magnetic core of an electrical machine, such as a motor or a transformer, is formulated as an inverse heat source problem. The sensor positions insid…
Computing homogenized coefficients via multiscale representation and hierarchical hybrid grids
A. Hannukainen, J. -C. Mourrat, H. Stoppels
We present an efficient method for the computation of homogenized coefficients of divergence-form operators with random coefficients. The approach is based on a multiscale represen…
Computational framework for applying electrical impedance tomography to head imaging
Valentina Candiani, Antti Hannukainen, Nuutti Hyvönen
This work introduces a computational framework for applying absolute electrical impedance tomography to head imaging without accurate information on the head shape or the electrode…
Efficient solution of symmetric eigenvalue problems from families of coupled systems
Antti Hannukainen, Jarmo Malinen, Antti Ojalammi
Efficient solution of the lowest eigenmodes is studied for a family of related eigenvalue problems with common block structure. It is assumed that the upper diagonal bl…
An inverse boundary value problem for the -Laplacian
Antti Hannukainen, Nuutti Hyvönen, Lauri Mustonen
This work tackles an inverse boundary value problem for a -Laplace type partial differential equation parametrized by a smoothening parameter . The aim is to numericall…
An acoustic glottal source for vocal tract physical models
Antti Hannukainen, Juha Kuortti, Jarmo Malinen +1
A sound source was proposed for acoustic measurements of physical models of the human vocal tract. The physical models are produced by Fast Prototyping, based on Magnetic Resonance…
Spectral Study of the Vocal Tract in Vowel Synthesis: A Comparison between 1D and 3D Acoustic Analysis
Negar M. Harandi, Daniel Aalto, Antti Hannukainen +2
A state-of-the-art 1D acoustic synthesizer has been previously developed, and coupled to speaker-specific biomechanical models of oropharynx in ArtiSynth. As expected, the formant…
Efficient inclusion of total variation type priors in quantitative photoacoustic tomography
Antti Hannukainen, Nuutti Hyvönen, Helle Majander +1
Quantitative photoacoustic tomography is an emerging imaging technique aimed at estimating the distribution of optical parameters inside tissues from photoacoustic images, which ar…
Convergence analysis of GMRES for the Helmholtz equation via pseudospectrum
Antti Hannukainen
Most finite element methods for solving time-harmonic wave-propagation problems lead to a linear system with a non-normal coefficient matrix. The non-normality is due to boundary c…
Edge-promoting reconstruction of absorption and diffusivity in optical tomography
Antti Hannukainen, Lauri Harhanen, Nuutti Hyvönen +1
In optical tomography a physical body is illuminated with near-infrared light and the resulting outward photon flux is measured at the object boundary. The goal is to reconstruct i…
Field of values analysis of preconditioners for the Helmholtz equation in lossy media
Antti Hannukainen
In this paper, we analyze the convergence of the preconditioned GMRES method for the first order finite element discretizations of the Helmholtz equation in media with losses. We c…