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    Wyświetlanie 1-5 z 5
    Tytuł:
    The interval Shapley value of an M/M/1 service system
    Autorzy:
    E, C. G.
    Li, Q. L.
    Li, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/330815.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    M/M/1 service system
    cooperative interval game
    cost allocation
    Shapley value
    gra przedziałowa kooperatywna
    alokacja kosztów
    wartość Shapley'a
    Opis:
    Service systems and their cooperation are one of the most important and hot topics in management and information sciences. To design a reasonable allocation mechanism of service systems is the key issue in the cooperation of service systems. In this paper, we systematically introduce the interval Shapley value as cost allocation of cooperative interval games ,[...] arising from cooperation in a multi-server service system, and provide an explicit expression for the interval Shapley value of cooperative interval games [...]. We construct an interval game [...] of a service system which shares the same value for the grand coalition with the original interval game, by using the characteristic function which is dominated by the function of the original interval game. Finally, we prove that the interval game [...] is concave, which means that the interval Shapley value of the interval game [...] is in the interval core of this interval game, and illustrate this conclusion by using numerical examples.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2017, 27, 3; 549-562
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A scheme of resource allocation and stability for peer-to-peer file-sharing networks
    Autorzy:
    Li, S.
    Sun, W.
    E, C. G.
    Shi, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/331243.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    peer-to-peer networks
    fairness
    pricing
    stability
    utility maximization
    sieć peer-to-peer
    wycena
    maksymalizacja użyteczności
    Opis:
    Peer-to-peer (P2P) networks offer a cost-effective and easily deployable framework for sharing content. However, P2P file-sharing applications face a fundamental problem of unfairness. Pricing is regarded as an effective way to provide incentives to peers to cooperate. In this paper we propose a pricing scheme to achieve reasonable resource allocation in P2P file-sharing networks, and give an interpretation for the utility maximization problem and its sub-problems from an economic point of view. We also deduce the exact expression of optimal resource allocation for each peer, and confirm it with both simulation and optimization software. In order to realize the optimum in a decentralized architecture, we present a novel price-based algorithm and discuss its stability based on Lyapunov stability theory. Simulation results confirm that the proposed algorithm can attain an optimum within reasonable convergence times.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2016, 26, 3; 707-719
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Active fault tolerance control of a wind turbine system using an unknown input observer with an actuator fault
    Autorzy:
    Li, S.
    Wang, H.
    Aitouche, A.
    Tian, Y.
    Christov, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/329822.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    wind turbine system
    linear parameter varying system
    fault tolerant control
    unknown input observer
    elektrownia wiatrowa
    sterowanie tolerujące uszkodzenia
    obserwator wejściowy
    Opis:
    This paper proposes a fault tolerant control scheme based on an unknown input observer for a wind turbine system subject to an actuator fault and disturbance. Firstly, an unknown input observer for state estimation and fault detection using a linear parameter varying model is developed. By solving linear matrix inequalities (LMIs) and linear matrix equalities (LMEs), the gains of the unknown input observer are obtained. The convergence of the unknown input observer is also analysed with Lyapunov theory. Secondly, using fault estimation, an active fault tolerant controller is applied to a wind turbine system. Finally, a simulation of a wind turbine benchmark with an actuator fault is tested for the proposed method. The simulation results indicate that the proposed FTC scheme is efficient.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 69-81
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust adaptive fuzzy filters output feedback control of strict-feedback nonlinear systems
    Autorzy:
    Tong, S.
    Liu, C.
    Li, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/908148.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    system nieliniowy
    sterowanie rozmyte
    sprzężenie zwrotne
    nonlinear system
    adaptive fuzzy control
    backstepping
    small-gain approach
    K-filters
    Opis:
    In this paper, an adaptive fuzzy robust output feedback control approach is proposed for a class of single input single output (SISO) strict-feedback nonlinear systems without measurements of states. The nonlinear systems addressed in this paper are assumed to possess unstructured uncertainties, unmodeled dynamics and dynamic disturbances, where the unstructured uncertainties are not linearly parameterized, and no prior knowledge of their bounds is available. In recursive design, fuzzy logic systems are used to approximate unstructured uncertainties, and K-filters are designed to estimate unmeasured states. By combining backstepping design and a small-gain theorem, a stable adaptive fuzzy output feedback control scheme is developed. It is proven that the proposed adaptive fuzzy control approach can guarantee the all the signals in the closed-loop system are uniformly ultimately bounded, and the output of the controlled system converges to a small neighborhood of the origin. The effectiveness of the proposed approach is illustrated by a simulation example and some comparisons.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2010, 20, 4; 637-653
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Finite-time adaptive modified function projective multi-lag generalized compound synchronization for multiple uncertain chaotic systems
    Autorzy:
    Li, Q.
    Liu, S.
    Chen, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/331032.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    finite-time adaptive control
    unknown parameter
    chaotic system
    sterowanie adaptacyjne
    parametr nieznany
    układ chaotyczny
    Opis:
    In this paper, for multiple different chaotic systems with fully unknown parameters, a novel synchronization scheme called ‘modified function projective multi-lag generalized compound synchronization’ is put forward. As an advantage of the new method, not only the addition and subtraction, but also the multiplication of multiple chaotic systems are taken into consideration. This makes the signal hidden channels more abundant and the signal hidden methods more flexible. By virtue of finite-time stability theory and an adaptive control technique, a finite-time adaptive control scheme is established to realize the finite-time synchronization and to properly evaluate the unknown parameters. A detailed theoretical derivation and a specific numerical simulation demonstrate the feasibility and validity of the advanced scheme.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 4; 613-624
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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