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  • FLUID MECHANICS AND HEAT TRANSFER  (1)
  • Leray-Schauder condition  (1)
  • local controllability  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Multiple local solutions to nonlinear control processes (1990)
    Springer
    Journal of optimization theory and applications 67 (1990), S. 463-485 
    Details
    ISSN: 1573-2878
    Keywords: Perturbed linear control processes ; Nielsen fixed-point theory ; local controllability ; Leray-Schauder condition ; retractability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We use the topological tool of Nielsen fixed-point theory to study the controllability of perturbed linear control processes whose control space can be reduced to a finite-dimensional one. These methods produce a lower bound on the number of controls that achieve a given target. We concentrate particularly on the case where the perturbation has sublinear growth, and we exhibit examples of multiple controls of various types that are detected by the Nielsen theory method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939645
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Monogroove heat pipe design: Insulated liquid channel with bridging wick (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A screen mesh artery supported concentrically within the evaporator section of a heat pipe liquid channel retains liquid in the channel. Continued and uniform liquid feed to the heat pipe evaporation section (20) during periods of excessive heat transfer is assured. The overall design provides high evaporation and condensation film coefficients for the working fluid by means of the circumferential grooves in the walls of the vapor channel, while not interfering with the overall heat transport capability of the axial groove. The design has particular utility in zero-g environments.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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