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  • Bellman equation  (2)
  • EARTH RESOURCES AND REMOTE SENSING  (2)
  • ELECTRONIC SYSTEMS  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied mathematics & optimization 31 (1995), S. 1-17 
    ISSN: 1432-0606
    Keywords: Bellman equation ; Hamilton-Jacobi equation ; Quasi-variational inequality ; Viscosity solution ; Unbounded solutions ; Optimal switching ; Optimal control ; State constraints ; Production engineering ; 49C05 ; 49C20 ; 49B10 ; 49A36
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We study a quasi-variational inequality system with unbounded solutions. It represents the Bellman equation associated with an optimal switching control problem with state constraints arising from production engineering. We show that the optimal cost is the unique viscosity solution of the system.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of optimization theory and applications 93 (1997), S. 491-515 
    ISSN: 1573-2878
    Keywords: Production schedule ; scheduling problems ; quasivariational inequalities ; Bellman equation ; numerical solutions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, we deal with the numerical solution of the optimal scheduling problem in a multi-item single machine. We develop a method of discretization and a computational procedure which allows us to compute the solution in a short time and with a precision of order k, where k is the discretization size. In our method, the nodes of the triangulation mesh are joined by segments of trajectories of the original system. This special feature allows us to obtain precision of order k, which is in general impossible to achieve by usual methods. Also, we develop a highly efficient algorithm which converges in a finite number of steps.
    Type of Medium: Electronic Resource
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  • 3
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    In:  Other Sources
    Publication Date: 2019-06-28
    Description: Digital technique for television systems can be used with remote manipulators. Algorithm is used to divide image into N-by-N picture elements which may be individually enhanced. Enhancement may be controlled with joystick. Similar arrangement simplifies remote manipulator operation.
    Keywords: ELECTRONIC SYSTEMS
    Type: MFS-23364 , NASA Tech Briefs (ISSN 0145-319X); 1; 1; P. 29
    Format: text
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  • 4
    Publication Date: 2019-06-27
    Description: Results of a survey of earth resources user applications and their data requirements, earth resources multispectral scanner sensor technology, and preprocessing algorithms for correcting the sensor outputs and for data bulk reduction are presented along with a candidate data format. Computational requirements required to implement the data analysis algorithms are included along with a review of computer architectures and organizations. Computer architectures capable of handling the algorithm computational requirements are suggested and the environmental effects of an on-board processor discussed. By relating performance parameters to the system requirements of each of the user requirements the feasibility of on-board processing is determined for each user. A tradeoff analysis is performed to determine the sensitivity of results to each of the system parameters. Significant results and conclusions are discussed, and recommendations are presented.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-137758
    Format: application/pdf
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  • 5
    Publication Date: 2019-06-27
    Description: The feasibility was investigated of an on-board earth resources data processor launched during the 1980-1990 time frame. Projected user applications were studied to define the data formats and the information extraction algorithms that the processor must execute. Based on these constraints, and the constraints imposed by the available technology, on-board processor systems were designed and their feasibility evaluated. Conclusions and recommendations are given.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-137757
    Format: application/pdf
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  • 6
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    In:  Other Sources
    Publication Date: 2019-06-28
    Description: Programable system enhances digitally monocular and stereographic images at video rates. Provides automatic and interactive enhancement modes based on histogram modification and intensity-mapping techniques.
    Keywords: ELECTRONIC SYSTEMS
    Type: MFS-25679 , NASA Tech Briefs (ISSN 0145-319X); 8; 2; P. 187
    Format: text
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