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Träfflista för sökning "WFRF:(Wickström Nicholas 1970 ) srt2:(1997-1999)"

Sökning: WFRF:(Wickström Nicholas 1970 ) > (1997-1999)

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1.
  • Jonsson, Magnus, 1969-, et al. (författare)
  • Vision-based low-level navigation using a feed-forward neural network
  • 1997
  • Ingår i: Proc. International Workshop on Mechatronical Computer Systems for Perception and Action (MCPA'97), Pisa, Italy, Feb. 10-12. ; , s. 105-111
  • Konferensbidrag (refereegranskat)abstract
    • In this paper we propose a simple method for low-level navigation for autonomous mobile robots, employing an artificial neural network. Both corridor following and obstacle avoidance in indoor environments are managed by the same network. Raw grayscale images of size 32 x 23 pixels are processed one at a time by a feed-forward neural network. The output signals from the network directly control the motor control system of the robot. The feed-forward network is trained using the RPROP algorithm. Experiments in both familiar and unfamiliar environments are reported.
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2.
  • Wickström, Nicholas, 1970-, et al. (författare)
  • Neural Virtual Sensors — Estimation of Combustion Quality in SI Engines using the Spark Plug
  • 1998
  • Ingår i: ICANN 98. - London : Springer. - 9783540762638 - 9781447115991 ; , s. 215-220
  • Konferensbidrag (refereegranskat)abstract
    • We propose two virtual sensors which estimate the location of the pressure peak and the air-fuel ratio from measurements of the ionization current across the spark plug gap.The location of pressure peak virtual sensor produces estimates on a cycle-by-cycle basis for each of the cylinders. These estimates are twice as good as estimates obtained from a linear model.The air-fuel ratio virtual sensor uses the universal exhaust gas oxygen sensor as reference; it produces estimates that are ten times better than estimates obtained from a linear model.
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