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Wyszukujesz frazę "Fernandes, L. M." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    On the Solution of a Finite Element Approximation of a Linear Obstacle Plate Problem
    Autorzy:
    Fernandes, L. M.
    Figueiredo, I. N.
    Judice, J. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/907894.pdf
    Data publikacji:
    2002
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    matematyka
    variational inequality
    complementarity problem
    contact problem
    Opis:
    In this paper the solution of a finite element approximation of a linear obstacle plate problem is investigated. A simple version of an interior point method and a block pivoting algorithm have been proposed for the solution of this problem. Special purpose implementations of these procedures are included and have been used in the solution of a set of test problems. The results of these experiences indicate that these procedures are quite efficient to deal with these instances and compare favourably with the path-following PATH and the active-set MINOS codes of the commercial GAMS collection
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2002, 12, 1; 27-40
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determining hop-constrained spanning trees with repetitive heuristics
    Autorzy:
    Fernandes, M.
    Gouveia, L.
    Voß, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/308588.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    hop-constrained spanning tree problem
    metaheuristics
    pilot method
    rollout method
    Opis:
    The hop-constrained minimum spanning tree problem is the problem of determining a rooted spanning tree of minimum cost in which each path from the root node to any other node contains at most H hops or edges. This problem relates to the design of centralized tree networks with quality of service requirements (in telecommunications) and has a close relation with other tree problems. In this paper we investigate the adaptation of some well-known "repetitive" heuristics used for the capacitated minimum spanning tree problem to the hop-constrained minimum spanning tree problem and investigate some simple look ahead mechanisms for enhancing the quality of a savings heuristic. Computational results for a set of benchmark tests with up to 80 nodes are presented.
    Źródło:
    Journal of Telecommunications and Information Technology; 2007, 4; 16-22
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Handgrip explosive force is correlated with mobility in the elderly women
    Autorzy:
    Borges, L. S.
    Fernandes, M. H.
    Schettino, L.
    Coqueiro, R. S. da
    Pereira, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/306407.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    starzenie
    mobilność
    siła mięśni
    aging
    mobility
    maximum muscle strength
    Opis:
    The analysis of explosive force, through rate of force development (RFD) and contractile impulse (CI), from handgrip strength data seems to be useful and promising information to study the aging of musculoskeletal system and health status. We aimed to test the hypothesis that, in elderly women, the handgrip explosive force could be better associated to the functional mobility than maximum handgrip strength. Handgrip strength and the performance of Timed Up & Go Test (TUG) were measured from sixty-five community-dwelling healthy elderly women. The average slope of the moment–time curve (Δ moment/Δ time) over the time interval of 0–200 ms relative to the onset of contraction was calculated to provide the RFD and CI. The highest strength achieved during the isometric contraction was used as maximum handgrip strength. Pearson correlations were used to assess the strength of the relationship between the handgrip strength parameters (Maximum strength and explosive force from 0–200 ms) and TUG test performance from older women. The correlation analysis showed that the TUG test performance was inversely correlated to the handgrip strength parameters, with better relationship with explosive force parameters. The handgrip explosive force seems to be a promising predictor of functional mobility of elderly women, since it showed a better relationship with functional mobility than maximum handgrip strength.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 3; 145-149
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of ISTTOK runaway - electrons energies by means of a Cherenkov - type probe with modified AlN radiators
    Autorzy:
    Jakubowski, L.
    Plyusnin, V. V.
    Sadowski, M. J.
    Zebrowski, J.
    Malinowski, K.
    Rabiński, M.
    Fernandes, H.
    Silva, C.
    Duarte, P.
    Jakubowski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147516.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    ISTTOK
    runaway electrons
    Cherenkov detector
    AlN radiators
    Opis:
    Measurements of fast electrons, as performed during recent few years in small tokamaks, demonstrated that detectors based on the Cherenkov effect are very useful tools for such studies. The modernized measuring heads, which were equipped with miniature aluminum-nitride (AlN) radiators, enabled to determine locations and instants of the fast electrons emission and to estimate their energy. A comparison of four measuring channels showed that in ISTTOK the most important role was played by electrons of energy less than 90 keV.
    Źródło:
    Nukleonika; 2012, 57, 2; 177-181
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and catalytic properties of SAPO-11 molecular sieve synthesized in hydrothermal media using di-isopropylamine as template
    Autorzy:
    Chellappa, T.
    Costa, M. J. F.
    Nascimento, W. A.
    Ferreira De Lima, L.
    Bassan, I. A.
    Tavares, M.
    Fernandes, V. J.
    Menezes, A.
    Guilherme Meira, L.
    Telesforo Nóbrega De Medeiros, J.
    Maribondo Do Nascimento, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/200372.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    microporous materials
    SAPO-11
    characterization
    catalytic activity
    molecular sieves
    Opis:
    A microporous SAPO-11 Molecular sieve was successfully synthesized by the hydrothermal method, using a single agent, as an organic template: di-isopropylamine (DIPA). The obtained solid was calcined at 550◦C for three hours, after which the flow of nitrogen was exchanged for that of synthetic air and submitted for another ten hours of calcination, so as to remove the single agent: di-isopropylamine, which after the removal of the template could be observed by the high crystallization of the sample. Furthermore, the molecular sieve was characterized by XRD, SEM, TG-DTG and N2 adsorption desorption (BET analysis). The obtained catalyst proved to have a high potential catalytic activity and selectivity, through the obtained characterization results, exhibiting good hydrothermal stability. The catalytic performance of SAPO-11 was tested by the deactivation/regenerability of the coked sample, furthered by cracking of n-hexane reaction and high olefins selectivity was obtained.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 481-488
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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