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    Wyświetlanie 1-4 z 4
    Tytuł:
    A Homotopy Approach to Rational Covariance Extension With Degree Constraint
    Autorzy:
    Enqvist, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/908061.pdf
    Data publikacji:
    2001
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    optymalizacja
    teoria systemów
    stochastic realization theory
    rational covariance extension problem
    ARMA model design
    continuation method
    optimization
    Opis:
    The solutions to the Rational Covariance Extension Problem (RCEP) are parameterized by the spectral zeros. The rational filter with a specified numerator solving the RCEP can be determined from a known convex optimization problem. However, this optimization problem may become ill-conditioned for some parameter values. A modification of the optimization problem to avoid the ill-conditioning is proposed and the modified problem is solved efficiently by a continuation method.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2001, 11, 5; 1173-1201
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of operative decisions ; computer analysis
    Autorzy:
    Malinowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/205746.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    analiza komputerowa
    optymalizacja
    symulacja komputerowa
    teoria decyzji
    teoria gier
    teoria systemów
    computer analysis
    computer simulation
    forecast
    management
    operative control
    operative decisions
    optimization
    Opis:
    When entering the age of ubiquitous computing we observe a rapidly increasing number of applications in which - in real time - operative (control or management) decisions are made based on optimization. To implement repetitive optimization of these decisions we need to use process models, models or directly available forecasts of free, uncontrolled, inputs, methods for state and parameter estimation, model adaptation techniques, and, finally, suitable optimization techniques. Analysis and validation of such optimization based systems require - prior to actual real-life implementation - the carefully planned and performed computer experiments. Theoretical methods are always welcome to assist in this analysis - if possible - but it is mainly the computer based simulation experiment which allows us to investigate, verify and tune a complicated decision mechanism and then control system as a whole before this system is authorized to be put to real-life test. Success in design of a system with on-line computed optimization-based operative decisions is therefore dependent upon many factors, in particular - on having good models, efficient and reliable optimization techniques, good software tools for computer based simulation and on proper, real-life-like conditions under which the computer experiments are performed. These key issues concerning development of such control systems are discussed in this paper.
    Źródło:
    Control and Cybernetics; 2000, 29, 1; 257-274
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic control of a class of discrete event systems using a state reconstruction algorithm
    Autorzy:
    Martinelli, F.
    Nicosia, S.
    Valigi, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/205600.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    discrete events systems
    optymalizacja
    sterowanie
    teoria systemów
    Kanbaal systems
    optimization
    ordinal optimization
    production control
    resource allocations
    sample path analysis
    Opis:
    The problem of dynamic control of Discrete Event Dynamic Systems (DEDS) is addressed in this paper as a dynamic optimization problem : some resources must be allocated to the system in order to optimize a performance function which is assumed time-varying. The control scheme exploits a state reconstruction algorithm to compute an estimate of the performance for perturbed sample paths. The algorithm is based on the use of data extracted from the observation of the system and allows to accurately reconstruct its state behavior, for resource allocations different from the nominal one. The proposed control scheme is then used for dynamic allocation of buffer capacities in mamlfaeturing systems, such as Kanban systems. A parallel implementation of the whole algorithm is also mentioned.
    Źródło:
    Control and Cybernetics; 2000, 29, 1; 275-294
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of survival strategy by application of safety dependent utility model
    Autorzy:
    Kulikowski, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/205749.pdf
    Data publikacji:
    2000
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    optymalizacja
    prawdopodobieństwo
    ryzyko
    teoria decyzji
    teoria systemów
    wzór użytkowy
    death-averting
    decision support
    expcted return
    life saving
    optimization
    optimum life-saving strategy
    probability of death and survival
    risk
    safety
    utility models
    Opis:
    This paper deals with life-saving decisions. The decision maker can buy a number of death-averting devices or services which increase his safety S at the expense of the discounted future consumption R. The safety and consumption depend parametrically on the death probability p and the probability reducing strategy x, i.e. S(p/x); R(p/x). The two-factors utility function U(S, R) is used to find the optimum strategy x = [...]. which maximizes U(x). One can show that the unique strategy [...] exists and can be effectively derived. Many applications of proposed methodology are indicated.
    Źródło:
    Control and Cybernetics; 2000, 29, 1; 167-178
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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