Blar i Brage NMBU på forfatter "Nielsen, Bjørn Fredrik"
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Adapting a deep bed filtration model to real-world data
Øydvin, Erlend (Master thesis, 2017)Reint og trygt drikkevatn er ein begrensa ressurs i verda, og patogene mikroorganismar i drikkevatnet kan utgjere ein fare for konsumentane dersom vatnet ikkje vert behandla riktig. Koagulering- og filtrering og er ein ... -
Generalized spectrum of second order differential operators
Gergelits, Tomas; Nielsen, Bjørn Fredrik; Strakos, Zdenek (Peer reviewed; Journal article, 2020)We analyze the spectrum of the operator $\Delta^{-1} [\nabla \cdot (K\nabla u)]$, where $\Delta$ denotes the Laplacian and $K=K(x,y)$ is a symmetric tensor. Our main result shows that this spectrum can be derived from the ... -
Ill-posed Point Neuron Models
Nielsen, Bjørn Fredrik; Wyller, John Andreas (Journal article; Peer reviewed, 2016) -
PDE-constrained optimization : preconditioners and diffuse domain methods
Elvetun, Ole Løseth (PhD Thesis;2015:84, Doctoral thesis, 2018-04-30)This thesis is mainly concerned with the efficient numerical solution of optimization problems subject to linear PDE-constraints, with particular focus on robust preconditioners and diffuse domain methods. Associated with ... -
Preconditioners for PDE-constrained optimization problems with box constraints: Towards high resolution inverse ECG images
Elvetun, Ole Løseth; Nielsen, Bjørn Fredrik (Journal article; Peer reviewed, 2017) -
Regularization of Ill-Posed Point Neuron Models
Nielsen, Bjørn Fredrik (Journal article; Peer reviewed, 2017)