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This contribution reviews theory, algorithms, and validation results for system identification of continuous-time state-space models from finite input- output sequences. The algorithms developed are autoregressive methods, methods of subspace-based model identification and stochastic realization adapted to the continuous-time context. The resulting model can be decomposed into an input-output mode
Homogeneous Charge Compression Ignition (HCCI) holds promise for reduced emissions and increased efficiency compared to conventional internal combustion engines. As HCCI lacks direct actuation over the combustion phasing, much work has been devoted to designing controllers capable of set-point tracking and disturbance rejection. This paper presents results on model predictive control (MPC) of the
The transition from a fossil to a bio-based economy is of vital importance to stem the effects of ongoing climate change.This bio-based economy will necessitate the production of both biofuels and chemical compounds from biologicalsources. Hydrogen is a promising candidate as a renewable energy carrier due to its high energy density, carbonneutrality when combusted and its potential use as a reduc
Background: Non-alcoholic fatty liver disease (NAFLD) is highly associated with the metabolic syndrome, and due to increasing prevalence of for example obesity it is now the most common liver disease in the world. A minority progress to advanced fibrosis/cirrhosis, which is associated with increased mortality, but it is not entirely clear which patients who have an increased risk of fibrosis.Gener
BACKGROUND AND AIM: Progression to fibrosis in non-alcoholic fatty liver disease (NAFLD) is associated with an increased risk of liver-related events, overall mortality and possibly metabolic comorbidities. Our aim was to determine if non-invasive fibrosis scoring systems can predict the future risk of diabetes mellitus, cardiovascular disease (CVD), chronic kidney disease (CKD), liver-related eve
Background: Our aim was to investigate the frequency of elevated liver enzymes and NAFLD in patients with known insulin resistance during 15 years of follow-up. Methods: Subjects with insulin resistance were identified from a population-based prospective cohort study in Sweden, Malm? Diet and Cancer Study, conducted in 1991-1996. Inall, 285 non-diabetic subjects with insulin resistance established
M. Holm, P. Blomström, J. Brandt, R. Johansson, C. Lührs, and S. B. Olsson. Determination of preferable wavelet propagation directions in atrial fibrillation. In Erik K. Fernström Symp. Atrial Fibrillation, Lund, Sweden, June 1993.
M. Holm, P. Blomström, J. Brandt, R. Johansson, C. Lührs, and S. B. Olsson. Determination of the dominating wavelet propagation in atrial fibrillation. In I
A critical factor in analyzing the propagation of activation waves in the myocardium is the definition of local activation times (LAT) in the electrogram. The authors have formulated and tested a definition of LAT in bipolar electrograms applicable to atrial electrograms containing deflections with wide variation in complexity, e.g. those obtained during rapid, irregular atrial rhythm, i.e. atrial
A condensed treatment of conventional beam physics (both linear and nonlinear) is given for the non-expert; this constitutes a minimum knowhow for constructing simulations of rudimentary beamlines. The criteria for an ideal nonlinear charged-particle simulation algorithm are then presented, leading to the derivation of a symplectic, explicit, Lorentz-covariant integrator.Space charge (inter-particA condensed treatment of conventional beam physics (both linear and nonlinear) is given for the non-expert; this constitutes a minimum knowhow for constructing simulations of rudimentary beamlines. The criteria for an ideal nonlinear charged-particle simulation algorithm are then presented, leading to the derivation of a symplectic, explicit, Lorentz-covariant integrator.Space charge (inter-partic
BACKGROUND: Previous studies have shown that atrial fibrillation of recent onset in man is based on a varying number of simultaneously present activation waves reentering either themselves or each other. In the present study, right atrial activation during chronic atrial fibrillation in man was studied. METHODS AND RESULTS: In 16 patients with chronic atrial fibrillation multiple epicardial record
The topic of social equity in transport planning has been dealt with, in particular, by authorssuch as Martens (2012) and Martens and Golob (2012) using a social justice based-approach. However,such an approach, whilst valuable and analytically rigorous (based as it is on accessibility modelling),does not consider a wide range of possible other social impacts of transport, as set out in a framewor
Background: Delayed cord clamping (DCC) is associated with an improved iron status at 8 months, a reduction of anemia at 12 months, and an improved development at 4 years. Assessment of the development after DCC has not been performed earlier in a setting with a high prevalence of iron deficiency. Objective: The aim of this paper was to investigate the effects of DCC compared to early cord clampin
