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Wyszukujesz frazę "Raymond, J." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Stability analysis of relaxed Dirichlet boundary control problems
    Autorzy:
    Arada, N.
    Raymond, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/206117.pdf
    Data publikacji:
    1999
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    pomiary Younga
    relaksacja
    sterowanie
    control problems
    Dirichlet boundary control
    pointwise state constraints
    relaxation
    stability properties
    Young measures
    Opis:
    We study the relaxation by Young measures of a Dirichlet control problem with pointwise state constraints. We give a necessary and sufficient condition for the properness of the relaxation. This condition is expressed in terms of stability properties, for the original control problem, with respect to geometrical perturbations of state constraints.
    Źródło:
    Control and Cybernetics; 1999, 28, 1; 35-51
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On a degenerate Riccati equation
    Autorzy:
    Kesavan, S.
    Raymond, J. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/970756.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    algebraic Riccati equation
    optimal control
    parabolic systems
    Opis:
    In this paper, we study the existence of solutions to a degenerate algebraic Riccati equation associated to an optimal control problem with infinite time horizon. Under some assumptions on the control system, we can select a solution to this Riccati equation providing a feedback control law able to stabilize the system.
    Źródło:
    Control and Cybernetics; 2009, 38, 4B; 1393-1410
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pressure drop of filtering facepiece respirators: How low should we go?
    Autorzy:
    Kim, Jung-Hyun
    Roberge, Raymond J.
    Powell, Jeffrey B.
    Shaffer, Ronald E.
    Ylitalo, Caroline M.
    Sebastian, John M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2177016.pdf
    Data publikacji:
    2015-02-24
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    respirator
    filter
    oral breathing
    nasal breathing
    Opis:
    Introduction This study was undertaken to determine the mean peak filter resistance to airflow (R filter) encountered by subjects while wearing prototype filtering facepiece respirators (PRs) with low Rfilter during nasal and oral breathing at sedentary and low-moderate work rates. Material and methods In-line pressure transducer measurements of mean R filter across PRs with nominal R filter of 29.4 Pa, 58.8 Pa and 88.2 Pa (measured at 85 l/min constant airflow) were obtained during nasal and oral breathing at sedentary and low-moderate work rates for 10 subjects. Results The mean R filter for the 29.4 PR was significantly lower than the other 2 PRs (p < 0.000), but there were no significant differences in mean R filter between the PRs with 58.8 and 88.2 Pa filter resistance (p > 0.05). The mean R filter was greater for oral versus nasal breathing and for exercise compared to sedentary activity (p < 0.001). Conclusions Mean oral and nasal R filter for all 3 PRs was at, or below, the minimal threshold level for detection of inspiratory resistance (the 58.8–74.5 Pa/l×s⁻¹), which may account for the previously-reported lack of significant subjective or physiological differences when wearing PRs with these low R filter. Lowering filtering facepiece respirator R filter below 88.2 Pa (measured at 85 l/min constant airflow) may not result in additional subjective or physiological benefit to the wearer.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2015, 28, 1; 71-80
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Localization of Excitons in the Wetting Layer Accompanying Self-Assembled InAs/GaAs Quantum Dots
    Autorzy:
    Babinski, A.
    Raymond, S.
    Wasilewski, Z.
    Lapointe, J.
    Potemski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038091.pdf
    Data publikacji:
    2004-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.35.Pq
    71.35.Ji
    71.70.Ej
    Opis:
    A wetting layer is a narrow, highly strained quantum well, which accompanies quantum dots grown in Stranski-Krastanow mode. Its importance for a full description of the quantum dots properties has recently been pointed out. It has been shown for example that excitons can be localized by potential fluctuations in the wetting layer. This is equivalent to the formation of "natural" quantum dots in the WL. Excitonic emission from the single dots formed in the wetting layer accompanying the InAs/GaAs self-assembled quantum dots has been investigated in a high magnetic field (up to 23 T). Quadruplet splitting of the investigated emission line has been observed. The attribution of the emission line to the recombination of negatively charged exciton is discussed.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 6; 547-552
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mixed noble gas effect on cut green peppers
    Autorzy:
    Raymond, L.V.
    Zhang, M.
    Karangwa, E.
    Chesereka, M.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/24958.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Increasing attempts at using gas which leads to hydrate formation as a preservative tool in fresh-cut fruits and vegetables have been reported. In this study, changes in some physical and biochemical properties of fresh-cut green peppers under compressed noble gas treatments were examined. Mixed argonkrypton and argon treatments were performed before cold storage at 5°C for 15 days. Mass loss and cell membrane permeability were found to be the lowest in mixed argon-krypton samples. Besides, a lowerCO2 concentration and vitamin C loss were detected in gastreated samples compared to untreated samples (control). While the total phenol degradation was moderately reduced, the effect of the treatment on polyphenoloxidase activity was better at the beginning of the storage period. The minimum changes in quality observed in cut peppers resulted from both mixed and gas treatment alone.
    Źródło:
    International Agrophysics; 2013, 27, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neutral and Charged Excitons Localized in the InAs/GaAs Wetting Layer
    Autorzy:
    Babiński, A.
    Czyż, M.
    Golnik, A.
    Borysiuk, J.
    Kret, S.
    Raymond, S.
    Lapointe, J.
    Wasilewski, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811914.pdf
    Data publikacji:
    2008-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.La
    78.55.Cr
    78.67.Hc
    Opis:
    It has recently been shown that potential fluctuations in a wetting layer, which accompanies InAs/GaAs quantum dots can localize excitons. Neutral excitons and biexcitons and charged excitons were identified. In this communication we report on studies of properties of the excitons over wide temperature range (T < 70 K). The micro-photoluminescence measurements enable investigation of excitons localized in a single potential fluctuation. Temperature-induced broadening of the neutral exciton as well as a quenching of the charged exciton at temperatures higher than 50 K are observed and discussed.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 5; 1055-1060
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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