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Träfflista för sökning "WFRF:(Larson R.) srt2:(2000-2004)"

Sökning: WFRF:(Larson R.) > (2000-2004)

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  • Hoffman, Johan, 1974-, et al. (författare)
  • The FEniCS project
  • 2003
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • The goal of the FEniCS project is to develop open-source software for the automation of Computational Mathematical Modeling (CMM). FEniCS is a joint project between the Toyota Technological Institute at Chicago, the University of Chicago, and Chalmers University of Technology. The vision of FEniCS is to set a new standard in CMM, which can be described as the Automation of CMM, towards the goals of generality, efficiency, and simplicity, concerning mathematical methodology, implementation, and application.
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  • Kalhori, S., et al. (författare)
  • Resonant ion-pair formation in electron collisions with rovibrationally cold H-3(+)
  • 2004
  • Ingår i: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 69:2, s. 022713-
  • Tidskriftsartikel (refereegranskat)abstract
    • Experimental and theoretical cross sections for the resonant ion-pair formation (RIP) in electron collisions with rovibrationally cold H-3(+) ions are presented. Absolute cross sections for the RIP process producing H- ions are measured for center-of-mass energies between 2-20 eV using the CRYRING, heavy-ion storage ring. Theoretical cross sections are obtained using wave-packet propagation on both one- and two-dimensional models of relevant diabatic-potential energy surfaces and couplings of H-3(+) and H-3.
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  • Liu, Y. Q., et al. (författare)
  • Eddy-current computations using adaptive grids and edge elements
  • 2002
  • Ingår i: IEEE transactions on magnetics. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9464 .- 1941-0069. ; 38:2, s. 449-452
  • Tidskriftsartikel (refereegranskat)abstract
    • Results are presented from eddy-current computations using adaptive techniques, based on rigorous a posteriori error estimates. The adaptivity restores the quadratic convergence with grid size of the magnetic energy, despite singularities occurring at corners. A new procedure is introduced to satisfy the solvability condition for the curl-curl equation. The methods are applied to a model of a hydrogenerator, with anisotropic conductivity and permeability. The ungauged formulation with both vector and scalar potentials gives very significant improvements in rate of convergence for this problem. Reasons for the improved convergence are discussed.
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