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Wyszukujesz frazę "Yoon, M.-K." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Degradations of 2,4-dichlorophenol and polychlorinated biphenyls with zero valent iron under subcritical conditions. Importance of subcritical water oxidation
    Autorzy:
    Oh, S.-Y.
    Yoon, M.-K.
    Powiązania:
    https://bibliotekanauki.pl/articles/207444.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    chemicals removal
    water treatment
    degradation
    gas chromatography
    iron
    mass spectrometry
    organic pollutants
    polychlorinated biphenyls
    2,4-dichlorophenol
    DCP
    polychlorinated biphenyl
    PCBs
    usuwanie chemikaliów
    uzdatnianie wody
    degradacja
    chromatografia gazowa
    żelazo
    spektrometria masowa
    zanieczyszczenia organiczne
    polichlorowane bifenyle
    PCB
    2,4-dichlorofenol
    Opis:
    The abiotic transformations of 2,4-dichlorophenol (DCP) and polychlorinated biphenyls (PCBs) has been examined in the presence and of zero valent iron (Fe(0)) under subcritical conditions. It was found that the degradation of DCP was significantly enhanced, showing complete degradation of DCP in 3 h at 300 °C. Control experiments without Fe(0) indicated that the removal of DCP in the iron–water system was mostly due to subcritical water oxidation and that the enhancement of degradation in the presence of Fe(0) was less significant. Regardless of Fe(0), PCBs were rapidly decomposed, showing 93% destruction in 5 h at 300 °C. Product identification by gas chromatography-mass spectrometry (GC-MS) analysis showed that the reductive transformation of DCP and PCBs w Fe(0) existed under subcritical conditions. Our results suggest that subcritical water degradation may be a possible remediation option to treat DCP and PCBs in water and soil.
    Źródło:
    Environment Protection Engineering; 2015, 41, 3; 73-86
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Solution for Safe Ship Considering Seakeeping PERformance
    Autorzy:
    Yoon, H.K.
    Nguyen, V.M.
    Nguyen, T.T.
    Powiązania:
    https://bibliotekanauki.pl/articles/116617.pdf
    Data publikacji:
    2018
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    seakeeping
    seakeeping performance
    safe ship
    safe ship considering
    optimal weather routing
    container ship
    Dynamic Programming (DP)
    Changwon National University (CWNU)
    Opis:
    In recent years, safety of a ships has become one important issues needed to solved as soon as possible in ship navigation. Optimal weather routing is one of best solution for ensuring safe operation of a ship with a with short passage time or minimum energy to avoid a certain excessive motion. This paper introduced the development of solution for safety and optimal weather routing a ship considering seakeeping performance based on model test result. This study introduced how to apply A* algorithm based on result of the seakeeping model test for determining the optimal ship routes. Seakeeping model test of 8600 TEU container ship was carried out in Changwon National University's seakeeping basin and its RAOs at various frequencies were used to predict the RMS motion values in irregular waves. The specially modelled path-cost function and the safety constraints were proposed for finding the optimal path of the ship. The comparison of ship performances estimated by great circle’s path and estimated optimal route during the voyage of the ship was investigated.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 517-525
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive Predictive Control of a Distillation Column
    Autorzy:
    Yoon, T. W.
    Yang, D. R.
    Lee, K. S.
    Kwon, Y. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/908309.pdf
    Data publikacji:
    1999
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    adaptacyjny układ sterowania
    sterownik predykcyjny
    adaptive control
    multivariable predictive controller
    distillation column
    Opis:
    Distillation processes reveal complicated multivariable nonlinear dynamics for which it is difficult to design a high-performance control system. This paper proposes an adaptive control scheme for a distillation column. The proposed adaptive system consists of a multivariable receding-horizon predictive controller using a transfer function model and a recursive least-squares (RLS) based estimator. Simulations show a consistent closed-loop performance despite the uncertain nonlinear characteristics of the distillation column.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 1999, 9, 1; 193-206
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zabezpieczenie transformatorów olejowych przed wybuchem: eksperymenty i symulacje
    Protection of oil-filled transformers against explosion: experiments and simulations
    Autorzy:
    Landis, B.
    Muller, S.
    Perigaud, G.
    Petrovan-Boiarciuc, M.
    Ahmed, O. K.
    Yoon, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/153693.pdf
    Data publikacji:
    2013
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    transformatory energetyczne
    eksplozja
    łuk elektryczny
    eksperymenty
    symulacje
    power transformers
    explosion
    electrical arc
    experiments
    simulations
    Opis:
    Eksplozje transformatorów olejowych są powodowane przez łuk elektryczy. W przeciągu milisekund łuk doprowadza do odparowania otaczającego go oleju a wygenerowany gaz znajduje się pod ciśnieniem ponieważ inercja oleju zapobiega jego ekspansji. To doprowadza do niebezpiecznych eksplozji, kosztownych awarii i ewentualnego zanieczyszczenia środowiska. Podczas gdy mury ochronne otaczające transformator mogą zahamować eksplozje a tryskacze zagasić wywołany pożar niniejszy dokument przedstawia strategię, która zapobiega eksplozji kadzi transformatora.
    Oil-filled transformer explosions are caused by electrical arc occurring in transformer tanks. Within milliseconds, arc vaporizes the surrounding oil and the generated gas is pressurized as the liquid inertia prevents its expansion. The pressure difference between the gas bubble and the surrounding oil generates pressure waves, which propagate and interact with the tank. The reflections of the pressure waves build up the static pressure, which rises and leads to the tank rupture since tanks are not designed to withstand such levels of static pressure. This results in dangerous explosions, expensive damages and possible environmental pollution. The current paper presents a strategy to prevent the transformer tank rupture. Once an electrical fault occurs, the fast depressurization of the tank is induced by quick oil evacuation to a reservoir in order to prevent the tank explosion. To evaluate the efficiency of this strategy, experiments and computer simulations are used. The experiments were performed on large scale transformers equipped with the protection. They confirmed that the protection prevents the explosion. Besides, simulations of the consequences of an electrical arc occurring in a 200 MVA transformer geometry were run and again, they confirmed that the static pressure increase can be prevented by a quick oil evacuation triggered by the first dynamic pressure peak generated by the electrical arc.
    Źródło:
    Pomiary Automatyka Kontrola; 2013, R. 59, nr 2, 2; 176-182
    0032-4140
    Pojawia się w:
    Pomiary Automatyka Kontrola
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Characterization of GaN/Polymer Composite p-n Junction with PEDOT Nanoparticle Interface Layer
    Autorzy:
    Kim, M.
    Jin, S.
    Choi, H.
    Kim, G.
    Yim, K.
    Kim, S.
    Nam, G.
    Yoon, H.
    Kim, Y.
    Lee, D.
    Kim, Jin
    Kim, Jong
    Leem, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1505152.pdf
    Data publikacji:
    2011-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.61.Ey
    81.15.Gh
    Opis:
    A heavily Si-doped GaN/polymer hybrid structure with p-type poly(3,4-ethylene-dioxythiophene):beta-1,3-glucan (PEDOT nanoparticle) interface layer has been fabricated. The Si-doped GaN thin film with carrier concentration of 1 × $10^{19} cm^{-3}$ was grown by metal-organic chemical vapor deposition. The PEDOT nanoparticle with various sizes ranging from 60 to 120 nm was synthesized via a miniemulsion polymerization process. The electrical conductivity of the PEDOT nanoparticle is less than 1.2 S/cm. The current-voltage (I-V) characteristic of the hybrid structure shows diode-like behavior. The I-V characteristic was examined in the framework of the thermionic emission model. The ideality factor of the structure without PEDOT nanoparticle interface layer is 12.9. However, the ideality factor of the hybrid structure with PEDOT nanoparticle interface layer is obtained as 1.9. The value of ideality factor is dramatically decreased by inserting the PEDOT nanoparticle interface layer.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 6; 875-879
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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