Åke Andersson

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In the present paper, the second order recursive algorithm for identification of ARX systems given in [1] is extended to an Instrumental Variables (IV) like second order recursive algorithm and a Prediction Error (PE) like second order recursive algorithm for identification of processes disturbed by colored noise. The proposed algorithms are demonstrated to(More)
The MAX IV facility, currently under construction in Lund, Sweden, features two electron storage rings operated at 3 GeV and 1.5 GeV and optimized for the hard X-ray and soft X-ray/VUV spectral ranges, respectively. A 3 GeV linear accelerator serves as a full-energy injector into both rings as well as a driver for a short-pulse facility, in which undulators(More)
Rates of dry weight loss and of colonization of litter samples of different plants by macro-invertebrates were estimated using litter bags submerged in different types of lake. Samples of Carex rostrata litter were submerged for 3 months, in summer, in two lakes, one with an acidic and nutrient-poor water and one with near-neutral and nutrient-rich water.(More)
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