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  • ASTRODYNAMICS  (1)
  • Fractional Programming  (1)
  • 1975-1979  (2)
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  • 1975-1979  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Generalization of some duality theorems in nonlinear programming (1977)
    Springer
    Mathematical programming 12 (1977), S. 293-317 
    Details
    ISSN: 1436-4646
    Keywords: Duality ; Lagrangian ; Nonlinear Programming ; Fractional Programming ; Pseudoconvex Function ; Sufficient Conditions for Optimality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract Pseudoconvexity of a function on one set with respect to some other set is defined and duality theorems are proved for nonlinear programming problems by assuming a certain kind of convexity property for a particular linear combination of functions involved in the problem rather than assuming the convexity property for the individual functions as is usually done. This approach generalizes some of the well-known duality theorems and gives some additional strict converse duality theorems which are not comparable with the earlier duality results of this type. Further it is shown that the duality theory for nonlinear fractional programming problems follows as a particular case of the results established here.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01593799
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    Paper (German National Licenses)
    Fulltext
  • 2
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    On-board landmark navigation and attitude reference parallel processor system (1978)
    In:  CASI
    Details
    Publication Date: 2006-01-12
    Description: An approach to autonomous navigation and attitude reference for earth observing spacecraft is described along with the landmark identification technique based on a sequential similarity detection algorithm (SSDA). Laboratory experiments undertaken to determine if better than one pixel accuracy in registration can be achieved consistent with onboard processor timing and capacity constraints are included. The SSDA is implemented using a multi-microprocessor system including synchronization logic and chip library. The data is processed in parallel stages, effectively reducing the time to match the small known image within a larger image as seen by the onboard image system. Shared memory is incorporated in the system to help communicate intermediate results among microprocessors. The functions include finding mean values and summation of absolute differences over the image search area. The hardware is a low power, compact unit suitable to onboard application with the flexibility to provide for different parameters depending upon the environment.
    Keywords: ASTRODYNAMICS
    Type: NASA. Goddard Space Flight Center Flight Mechanics(Estimation Theory Symp.; p 153-177
    Format: text
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    NASA TECHNICAL REPORTS
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