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Sökning: WFRF:(Koumoutsakos P)

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1.
  • Paolucci, M., et al. (författare)
  • Towards a living earth simulator
  • 2012
  • Ingår i: The European Physical Journal Special Topics. - : Springer Science and Business Media LLC. - 1951-6355 .- 1951-6401. ; 214:1, s. 77-108
  • Tidskriftsartikel (refereegranskat)abstract
    • The Living Earth Simulator (LES) is one of the core componentsof the FuturICT architecture. It will work as a federation ofmethods, tools, techniques and facilities supporting all of the FuturICTsimulation-related activities to allow and encourage interactive explorationand understanding of societal issues. Society-relevant problemswill be targeted by leaning on approaches based on complex systemstheories and data science in tight interaction with the other componentsof FuturICT. The LES will evaluate and provide answers to realworldquestions by taking into account multiple scenarios. It will buildon present approaches such as agent-based simulation and modeling,multiscale modelling, statistical inference, and data mining, movingbeyond disciplinary borders to achieve a new perspective on complexsocial systems.
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3.
  • Wälchli, D., et al. (författare)
  • Drag reduction in a minimal channel flow with scientific multi-agent reinforcement learning
  • 2024
  • Konferensbidrag (refereegranskat)abstract
    • We study drag reduction in a minimal turbulent channel flow using scientific multi-agent reinforcement learning (SMARL). The flow is controlled by blowing and suction at the wall of an open channel, with observable states derived from flow velocities sensed at adjustable heights. We explore the actions, state, and reward space of SMARL using the off-policy algorithm V-RACER. We compare single- and multi-agent setups, and compare the identified control policies against the well-known mechanism of opposition-control. Our findings demonstrate that off-policy SMARL reduces drag in various experimental setups, surpassing classical opposition-control by up to 20 percentage points.
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