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    Wyświetlanie 1-4 z 4
    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
    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:
    Reliability modeling of fault tolerant control systems
    Autorzy:
    Li, H.
    Zhao, Q.
    Yang, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/929822.pdf
    Data publikacji:
    2007
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    sterowanie tolerujące uszkodzenia
    ocena niezawodności
    procesy semimarkowskie
    fault tolerant control
    reliability evaluation
    semi-Markov processes
    Opis:
    This paper proposes a novel approach to reliability evaluation for active Fault Tolerant Control Systems (FTCSs). By introducing a reliability index based on the control performance and hard deadline, a semi-Markov process model is proposed to describe system operation for reliability evaluation. The degraded performance of FTCSs in the presence of imperfect Fault Detection and Isolation (FDI) is reflected by semi-Markov states. The semi-Markov kernel, the key parameter of the process, is determined by four probabilistic parameters based on the Markovian model of FTCSs. Computed from the transition probabilities of the semi-Markov process, the reliability index incorporates control objectives, hard deadline, and the effects of imperfect FDI, a suitable quantitative measure of the overall performance.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2007, 17, 4; 491-504
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A practical application of kernel-based fuzzy discriminant analysis
    Autorzy:
    Gao, J. Q.
    Fan, L. Y.
    Li, L.
    Xu, L. Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/908344.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    analiza dyskryminacyjna
    algorytm najbliższego sąsiada
    SVD
    kernel fuzzy discriminant analysis
    fuzzy k-nearest neighbor
    QR decomposition
    singular value decomposition (SVD)
    fuzzy membership matrix
    t-test
    Opis:
    A novel method for feature extraction and recognition called Kernel Fuzzy Discriminant Analysis (KFDA) is proposed in this paper to deal with recognition problems, e.g., for images. The KFDA method is obtained by combining the advantages of fuzzy methods and a kernel trick. Based on the orthogonal-triangular decomposition of a matrix and Singular Value Decomposition (SVD), two different variants, KFDA/QR and KFDA/SVD, of KFDA are obtained. In the proposed method, the membership degree is incorporated into the definition of between-class and within-class scatter matrices to get fuzzy between-class and within-class scatter matrices. The membership degree is obtained by combining the measures of features of samples data. In addition, the effects of employing different measures is investigated from a pure mathematical point of view, and the t-test statistical method is used for comparing the robustness of the learning algorithm. Experimental results on ORL and FERET face databases show that KFDA/QR and KFDA/SVD are more effective and feasible than Fuzzy Discriminant Analysis (FDA) and Kernel Discriminant Analysis (KDA) in terms of the mean correct recognition rate.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2013, 23, 4; 887-903
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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