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Wyszukujesz frazę "Yassine, A." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    A method for sensor placement taking into account diagnosability criteria
    Autorzy:
    Yassine, A. A.
    Ploix, S.
    Flaus, J.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/929893.pdf
    Data publikacji:
    2008
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    diagnostyka uszkodzeń
    diagnozowalność
    położenie sensora
    modelowanie strukturalne
    fault diagnosis
    diagnosability
    sensor placement
    structural modelling
    Opis:
    This paper presents a new approach to sensor placement based on diagnosability criteria. It is based on the study of structural matrices. Properties of structural matrices regarding detectability, discriminability and diagnosability are established in order to be used by sensor placement methods. The proposed approach manages any number of constraints modelled by linear or nonlinear equations and it does not require the design of analytical redundancy relations. Assuming that a constraint models a component and that the cost of the measurement of each variable is defined, a method determining sensor placements satisfying diagnosability specifications, where all the diagnosable, discriminable and detectable constraint sets are specified, is proposed. An application example dealing with a dynamical linear system is presented.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2008, 18, 4; 497-512
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new efficient and flexible algorithm for the design of testable subsystems
    Autorzy:
    Ploix, S.
    Yassine, A. A.
    Flaus, J.-M.
    Powiązania:
    https://bibliotekanauki.pl/articles/907766.pdf
    Data publikacji:
    2010
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    automatic test design
    structural approach
    fault diagnosis
    analytical redundancy relations
    relational algebra
    podejście strukturalne
    diagnostyka uszkodzeń
    algebra relacyjna
    Opis:
    In complex industrial plants, there are usually many sensors and the modeling of plants leads to lots of mathematical relations. This paper presents a general method for finding all the possible testable subsystems, i.e., sets of relations that can lead to various types of detection tests. This method, which is based on structural analysis, provides the constraints that have to be used for the design of each detection test and manages situations where constraints contain non-deductible variables and where some constraints cannot be gathered in the same test. Thanks to these results, it becomes possible to select the most interesting testable subsystems regarding detectability and diagnosability criteria. Application examples dealing with a road network, a digital counter and an electronic circuit are presented.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2010, 20, 1; 175-190
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Convergence of Tolands critical points for sequences of D.C. functions and application to the resolution of semilinear elliptic problems
    Autorzy:
    Yassine, A.
    Alaa, N.
    Elhilali Alaoui, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/206580.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    algorytm proksymalny
    funkcje D.C.
    optymalizacja niewypukła
    punkt krytyczny Tolanda
    semiliniowe zagadnienie eliptyczne
    dc functions
    non-convex optimization
    normalized D.C. decomposition
    proximal algorithm
    semilinear elliptic problem
    Toland's critical point
    Opis:
    We prove that if a sequence (fn)n of D.C. functions (Difference of two Convex functions) converges to a D.C. function f in some appropriate way and if un is a critical point of fn, in the sense described by Toland, and is such that (un)n converges to u, then a is a critical point of f, still in Toland's sense. We also build a new algorithm which searches for this critical point u and then apply it in order to compute the solution of a semilinear elliptic equation.
    Źródło:
    Control and Cybernetics; 2001, 30, 4; 405-417
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In - house preparation and evaluation of Tc-99m-HIG kit for detection of infection in AIDS patients
    Autorzy:
    Bakir, M. A.
    Mansour, R.
    Mohammad, A.
    Habil, K.
    Yassine, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/147896.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    99mTc-HIG
    HYNIC
    infection imaging
    Opis:
    99mTc-HIG can be used for early detection of inflammation and infection foci especially in immunodeficiency patients. The present study involves in-house preparation and evaluation of human immunoglobulin-hydrazinonicotinic acid (HIG-HYNIC) kit to be labeled with 99mTc. In this indirect labeling method, the structure and biological activity of the protein can be maintained. The kit consists of two vials A and B, the vial A contains 2 mg of HIG-HYNIC, and the vial B contains 10 mg of tricine and 1 mg of stannous chloride dihydrate (SnCl2.2H2O). The results revealed that the lyophilized kits were stable for at least 10 months, and showed a high quality from the points of physical, chemical, radiochemical and biological purities, and its validity for human injection. The labeling yield of HIG-HYNIC compound exceeded 98%. The application of the prepared kit was experimentally illustrated in animal models with artificially induced inflammatory lesions after E. coli injection into rat leg muscle. The biodistribution and imaging studies in rats have shown good localization in infected muscle (T) in comparison to the normal muscle (M) 4 and 24 h after injection. Ratios of 17 and 18 were achieved 4 and 24 h post injection, respectively. The results of biodistribution of 99mTc-HIG in human and initial clinical evaluation show that this agent is a good radiopharmaceutical for infection imaging.
    Źródło:
    Nukleonika; 2012, 57, 1; 117-124
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sub-gradient algorithms for computation of extreme eigenvalues of a real symmetric matrix
    Autorzy:
    Yassine, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/205834.pdf
    Data publikacji:
    1998
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    problem wartości własnej
    difference of convex functions
    eigenvalue problems
    Lagrangian duality
    non-convex optimization
    sub-gradient algorithms
    Opis:
    The computation of eigenvalues of a matrix is still of importance from both theoretical and practical points of view. This is a significant problem for numerous industrial and scientific situations, notably in dynamics of structures (e.g. Gerardin, 1984), physics (e.g. Rappaz, 1979), chemistry (e.g. Davidson, 1983), economy (e.g. Morishima, 1971; Neumann, 1946), mathematics (e.g. Golub, 1989; Chatelin, 1983, 1984, 1988). The study of eigenvalue problems remains a delicate task, which generally presents numerical difficulties in relation to its sensivity to roundoff errors that may lead to numerical unstabilities, particularly if the eigenvalues are not well separated. In this paper, new subgradient-algorithms for computation of extreme eigenvalues of a symmetric real matrix are presented. Those algorithms are based on stability of Lagrangian duality for non-convex optimization and on duality in the difference of convex functions. Some experimental results which prove the robustness and efficiency of our algorithms are provided.
    Źródło:
    Control and Cybernetics; 1998, 27, 3; 387-415
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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