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(Research report / Forskningsrapport, 1994)
(Research report / Forskningsrapport, 2001)
We consider optimal control problems where the state X(t) at time t of the system is given by a stochastic differential delay equation. The growth at time t not only depends on the present value X(t), but also on X(t-d) ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
This is a follow-up to a paper with the same title and by the same authors. In that paper, all groups were assumed to be abelian, and we are now aiming to generalize the results to nonabelian groups. The motivating point ...
(Research report / Forskningsrapport, 1977)
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
Cox’s proportional hazards regression model is the standard method for modelling censored life-time data with covariates. In its standard form, this method relies on a semiparametric proportional hazards structure, leaving ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Numerical simulations of granular flows with Navier–Stokes type models emerged in the last decade, challenging the well established depth-averaged models. The structure of these equations allows for extension to general ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
Stratified gas–liquid flow is a flow regime typically encountered in multiphase pipelines. The understanding and modeling of this regime is of engineering importance especially for the oil and gas industry. In this work, ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
This paper deals with a homogeneous Neumann problem of a nonlinear diffusion system involving variable exponents dependent on spatial and time variables and cross-diffusion terms. We prove the existence of weak solutions ...