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- Eriksson, Sune, et al.
(författare)
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Alternative extraction techniques for analysis of acrylamide in food : Influence of pH and digestive enzymes
- 2006
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Ingår i: Journal of food science and technology. - : Elsevier Ltd.. - 0022-1155 .- 0975-8402 .- 0023-6438. ; 39:4, s. 393-399
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Tidskriftsartikel (refereegranskat)abstract
- Acrylamide in food is normally measured as “water-soluble free acrylamide”. However, it is shown that the technique of extraction, according to the method for extraction of dietary fibres or at high pH can affect the results. This has to be accounted for, particularly in the assessment of exposure and in studies of bioavailability and, in the long term, health risk assessment.
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- Interdonato, Giovanni, 1986-, et al.
(författare)
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Downlink Training in Cell-Free Massive MIMO : A Blessing in Disguise
- 2019
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Ingår i: IEEE Transactions on Wireless Communications. - : Institute of Electrical and Electronics Engineers (IEEE). - 1536-1276 .- 1558-2248. ; 18:11, s. 5153-5169
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Tidskriftsartikel (refereegranskat)abstract
- Cell-free Massive MIMO (multiple-input multipleoutput) refers to a distributed Massive MIMO system where all the access points (APs) cooperate to coherently serve all the user equipments (UEs), suppress inter-cell interference and mitigate the multiuser interference. Recent works 1, 2 demonstrated that, unlike co-located Massive MIMO, the channel hardening is, in general, less pronounced in cell-free Massive MIMO, thus there is much to benefit from estimating the downlink channel. In this study, we investigate the gain introduced by the downlink beamforming training, extending the analysis in 1 to non-orthogonal uplink and downlink pilots. Assuming singleantenna APs, conjugate beamforming and independent Rayleigh fading channel, we derive a closed-form expression for the peruser achievable downlink rate that addresses channel estimation errors and pilot contamination both at the AP and UE side. The performance evaluation includes max-min fairness power control, greedy pilot assignment methods, and a comparison between achievable rates obtained from different capacitybounding techniques. Numerical results show that downlink beamforming training, although increases pilot overhead and introduces additional pilot contamination, improves significantly the achievable downlink rate. Even for large number of APs, it is not fully efficient for the UE relying on the statistical channel state information for data decoding.
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- Geiger, Matthias, et al.
(författare)
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On the Evolution of BPMN 2.0 Support and Implementation
- 2016
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Ingår i: Service-Oriented System Engineering (SOSE), 2016 IEEE Symposium on Service-Oriented System Engineering (SOSE). - : IEEE. - 9781509022533 ; , s. 119-128
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Konferensbidrag (refereegranskat)
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