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Wyszukujesz frazę "Alvarez, T." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Adjoint characterisations of unbounded weakly compact, weakly completely continuous and unconditionally converging operators
    Autorzy:
    Alvarez, T.
    Cross, R.
    Gouveia, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1289589.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Opis:
    Characterisations are obtained for the following classes of unbounded linear operators between normed spaces: weakly compact, weakly completely continuous, and unconditionally converging operators. Examples of closed unbounded operators belonging to these classes are exhibited. A sufficient condition is obtained for the weak compactness of T' to imply that of T.
    Źródło:
    Studia Mathematica; 1995, 113, 3; 283-298
    0039-3223
    Pojawia się w:
    Studia Mathematica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Robust stabilization using a sampled-data strategy of uncertain neutral state-delayed systems subject to input limitations
    Autorzy:
    El Fezazi, N.
    El Haoussi, F.
    Tissir, E. H.
    Alvarez, T.
    Tadeo, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/330988.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    robust stabilization
    sampled data
    time-delay system
    input saturation
    admissible initial conditions
    LMI
    stabilizacja odporna
    dane próbkowane
    układ z opóźnieniem
    nasycenie wejściowe
    Opis:
    Stabilization of neutral systems with state delay is considered in the presence of uncertainty and input limitations in magnitude. The proposed solution is based on simultaneously characterizing a set of stabilizing controllers and the associated admissible initial conditions through the use of a free weighting matrix approach. From this mathematical characterization, state feedback gains that ensure a large set of admissible initial conditions are calculated by solving an optimization problem with LMI constraints. Some examples are presented to compare the results with previous approaches in the literature.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 111-122
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Solutions for conservative nonlinear oscillators using an approximate method based on Chebyshev series expansion of the restoring force
    Autorzy:
    Beléndez, A.
    Hernández, A.
    Beléndez, T.
    Pascual, C.
    Alvarez, M.
    Arribas, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075577.pdf
    Data publikacji:
    2016-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.30.Hq
    02.30.Mv
    05.45.-a
    Opis:
    Approximate solutions for small and large amplitude oscillations of conservative systems with odd nonlinearity are obtained using a "cubication" method. In this procedure, the Chebyshev polynomial expansion is used to replace the nonlinear function by a third-order polynomial equation. The original second-order differential equation, which governs the dynamics of the system, is replaced by the Duffing equation, whose exact frequency and solution are expressed in terms of the complete elliptic integral of the first kind and the Jacobi elliptic function cn, respectively. Then, the exact solution for the Duffing equation is the approximate solution for the original nonlinear differential equation. The coefficients for the linear and cubic terms of the approximate Duffing equation - obtained by "cubication" of the original second-order differential equation - depend on the initial oscillation amplitude. Six examples of different types of common conservative nonlinear oscillators are analysed to illustrate this scheme. The results obtained using the cubication method are compared with those obtained using other approximate methods such as the harmonic, linearized and rational balance methods as well as the homotopy perturbation method. Comparison of the approximate frequencies and solutions with the exact ones shows good agreement.
    Źródło:
    Acta Physica Polonica A; 2016, 130, 3; 667-678
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Basin-Wide Maritime Awareness From Multi-Source Ship Reporting Data
    Autorzy:
    Greidanus, H.
    Alvarez, M.
    Eriksen, T. K.
    Argentieri, P.
    Cokacar, T.
    Pesaresi, A.
    Falchetti, S.
    Nappo, D.
    Mazzarella, F.
    Alessandrini, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/116214.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    marine traffic
    Ship Reporting
    Maritime Situational Picture
    Opis:
    A system was set up to ingest automatic ship position reports (terrestrial and satellite AIS, LRIT) and fuse these into a Maritime Situational Picture, tracking the ships within an ocean basin‐wide area of interest in real time. Trial runs were made over several months, collecting reporting data from a number of different sources, over the Gulf of Aden and the Western Indian Ocean. Also satellite radar surveillance was carried out in order to sample the presence of non‐reporting ships. The trial showed that satellite AIS is a powerful tool for basin‐wide ship traffic monitoring; that multiple AIS satellites are needed for sufficient completeness and update rate; and that coastal AIS and LRIT still provide essential complements to the satellite AIS data. The radar survey showed that about half of the radar‐detected ships are not seen in the reporting data. The ultimate purpose of this work is to support the countries around the Horn of Africa in the fight against piracy and to help build their capacity to deliver maritime security and safety.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 2; 185-192
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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