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Träfflista för sökning "L4X0:0348 2960 ;pers:(Olsson Per Magnus 1976)"

Sökning: L4X0:0348 2960 > Olsson Per Magnus 1976

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1.
  • Olsson, Per-Magnus, 1976-, et al. (författare)
  • Exploiting parallelization and synergy in derivative free optimization
  • 2020
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • Real life optimization often concerns difficult objective functions, in two aspects, namely that gradients are unavailable, and that evaluation of the objective function takes a long time. Such problems are often attacked with model building algorithms, where an approximation of the function is constructed and solved, in order to find a new promising point to evaluate. We study several ways of saving time by using parallel calculations in the context of model building algorithms, which is not trivial, since such algorithms are inherently sequential. We present a number of ideas that has been implemented and tested on a large number of known test functions, and a few new ones. The computational results reveal that some ideas are quite promising.
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2.
  • Burdakov, Oleg, 1953-, et al. (författare)
  • A Dual Ascent Method for the Hop-constrained Shortest Path with Application to Positioning of Unmanned Aerial Vehicles
  • 2008
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • We study the problem of positioning unmanned aerial vehicles (UAVs) to maintain an unobstructed flow of communication from a surveying UAV to some base station through the use of multiple relay UAVs. This problem can be modeled as a hopconstrained shortest path problem in a large visibility graph. We propose a dual ascent method for solving this problem, optionally within a branch-and-bound framework. Computational tests show that realistic problems can be solved in a reasonably short time, and that the proposed method is faster than the classical dynamic programming approach.
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  • Resultat 1-2 av 2
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rapport (2)
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övrigt vetenskapligt/konstnärligt (2)
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Holmberg, Kaj, 1955- (2)
Olsson, Per-Magn... (2)Ta bort avgränsningen
Burdakov, Oleg, 1953 ... (1)
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Linköpings universitet (2)
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Engelska (2)
Forskningsämne (UKÄ/SCB)
Naturvetenskap (2)

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