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Sökning: WFRF:(Burgard Dan)

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1.
  • Jirenhed, Dan-Anders, et al. (författare)
  • Exploring Internal Simulation of Perception in Mobile Robots
  • 2001
  • Ingår i: Lund University Cognitive Studies. ; 86, s. 107-113
  • Konferensbidrag (refereegranskat)abstract
    • Based on a neuroscientific hypothesis, this paper explores the possibility of an ‘inner world’ based on internal simulation of perception. We present three sets of experiments with a possible minimal model, using a simulated Khepera robot controlled by a simple recurrent connectionist network. Using an evolutionary algorithm the robots are trained on increasingly complex tasks. In the first experiment, serving as a baseline, robots are simply trained to map sensory input to motor output such that they move around in an environment without collisions. In the second experiment robots are additionally trained on predicting the next time step’s sensory input. In the third experiment, finally, the robot’s own prediction replaces the actual sensory input in order to investigate its capability to act ‘blindly’, i.e. in the temporary absence of external stimuli. Although only the first two experiments give positive results, we conclude that the experimental framework presented here should turn out useful in the investigation of more complex artificial neural models.
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2.
  • van Nuijs, Alexander L. N., et al. (författare)
  • Multi-year inter-laboratory exercises for the analysis of illicit drugs and metabolites in wastewater : development of a quality control system
  • 2018
  • Ingår i: TrAC. Trends in analytical chemistry. - : Elsevier. - 0165-9936 .- 1879-3142. ; 103, s. 34-43
  • Forskningsöversikt (refereegranskat)abstract
    • Thirty-seven laboratories from 25 countries present the development of an inter-laboratory testing scheme for the analysis of seven illicit drug residues in standard solutions, tap- and wastewater. Almost 10 000 concentration values were evaluated: triplicates of up to five samples and 26 laboratories per year. The setup was substantially improved with experiences gained across the six repetitions (e.g. matrix type, sample conditions, spiking levels). From this, (pre-)analytical issues (e.g. pH adjustment, filtration) were revealed for specific analytes which resulted in formulation of best-practice protocols for inter-laboratory setup and analytical procedures. The results illustrate the effectiveness of the interlaboratory setup to assess laboratory performance in the framework of wastewater-based epidemiology. The exercise proved that measurements of laboratories were of high quality (>80% satisfactory results for six out of seven analytes) and that analytical follow-up is important to assist laboratories in improving robustness of wastewater-based epidemiology results.
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