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  • 1985-1989  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Oblique grain boundaries: Analysis of light and electron beam induced current profiles in silicon (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 4748-4750 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Asymmetrical light and electron beam induced current profiles have been previously attributed to a difference of the diffusion length on the two sides of the grain boundary. We show that this feature is instead due to the grain boundary not being perpendicular to the surface. In this geometry, the equations describing the minority-carrier diffusion are not solvable by analytical procedures. A method for their numerical solution is hereby introduced, fast enough to allow the use of minimization procedures. A good agreement has been found between fitted values of the grain boundary inclination and those directly measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340135
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    On the investigation of the low-energy conformational space of molecules (1989)
    Springer
    Journal of mathematical chemistry 3 (1989), S. 311-320 
    Details
    ISSN: 1572-8897
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mathematics
    Notes: Abstract A new perspective on traditional energy minimization problems is provided by a connection between statistical thermodynamics and combinatorial optimization (finding the minimum of a function depending on many variables). The joint use of a new method for uncovering the global minimum of intramolecular potential energy functions, based on following the asymptotic behavior of a system of stochastic differential equations, and an iterative-improvement technique, whereby a search for relative minima is made by carrying out local quasi-Newton minimizations starting from many distinct points of the energy hypersurface, proved most effective for investigating the low-energy conformational space of molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01169598
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Global optimization and stochastic differential equations (1985)
    Springer
    Journal of optimization theory and applications 47 (1985), S. 1-16 
    Details
    ISSN: 1573-2878
    Keywords: Global optimization ; stochastic differential equations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Let ℝ n be then-dimensional real Euclidean space,x=(x 1,x 2, ...,x n)T ∈ ℝ n , and letf:ℝ n → R be a real-valued function. We consider the problem of finding the global minimizers off. A new method to compute numerically the global minimizers by following the paths of a system of stochastic differential equations is proposed. This method is motivated by quantum mechanics. Some numerical experience on a set of test problems is presented. The method compares favorably with other existing methods for global optimization.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00941312
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    Paper (German National Licenses)
    Fulltext
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