• 제목/요약/키워드: Gas exchange

검색결과 651건 처리시간 0.027초

CU/제올라이트에 의한 NO 제거반응 (NO Removal Reactoin by Cu/zeolite)

  • 신창섭
    • 한국안전학회지
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    • 제6권3호
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    • pp.5-11
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    • 1991
  • To remove NO from flue gas, a direct decomposition method to $N_2$ and $O_2$ was investigated by using copper / zeolite catalyst. The copper ion-exchanged HY type zeolite has high activity on NO decomposition. The decomposition activity was increased with the increase of ion-exchange level, contacting time and reaction temperature in the range of 30$0^{\circ}C$ -50$0^{\circ}C$ , and decreased with the oxygen addition.

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전력수급기본계획 수립위한 장기 전력수요 예측절차 (Overview of Long-tern Electricity Demand Forecasting Mechanism for National Long-term Electricity Resource Planning)

  • 김완수;전병규
    • 전기학회논문지
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    • 제59권9호
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    • pp.1581-1586
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    • 2010
  • Korea Power Exchange has successfully performed the Long-term Electricity Demand Forecasting. Recently there is a lot of change in electricity industry sector; the national master-plan for green gas emission reducing, rise of smart-grid, and new trend of electricity consumption, and it is becoming painful challenging for demand forecasting. In new circumstance the demand forecasting is required more flexible and more accurate.

Superconductivity in Fluorinated $YBa_2Cu_3O_{6+x}$

  • Lee, Cheol-Eui;D, White;P.K, Davies
    • Journal of Magnetics
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    • 제1권2호
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    • pp.57-59
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    • 1996
  • The YBa$_2$Cu$_3$O6+xstructures have been fluorinated by a gas phase exchange technique, and 19F NMR was used to identify the structural fluorine. Magnetic susceptibility measurements showed that the fluorination turned a marginally nonsuperconducting sample into a 40 K superconductor, as well as that it raised the onset of the superconducting transition of the 60 K superconductor YBa$_2$Cu$_3$O6.7 to about 100 K.

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전기점화기관에서 흡배기과정을 고려한 체적효율의 예측 및 실험 (The Prediction of Volumetric Efficiency Considering Gas Exchange Process in Spark Ignition Engine)

  • ;소순갑;정진은
    • 오토저널
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    • 제9권4호
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    • pp.77-85
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    • 1987
  • 본 논문은 단기통 4사이클 전기점화기관에서 가스교환 과정이 체적효율에 미치는 영향에 대하여 연구한 것이다. 가스교환 과정의 수학적 모델을 설정하고 수치해석을 수행한 결과 체적효율은 가스교환과정과 관련되는 밸브 개폐시기(1,2)보다는 흡배기관의 압력에 의하여 더 큰 영향을 받는 다는 것을 알 수 있었다. 실험에 있어서는 각각 밸브 개폐시기가 다른 3종류의 캠을 사용하였 으며 수치 해석결과와 실험결고가 비교적 잘 일치하였다.

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Nuclear Magnetic Relaxation in Flurinated $YBa_2Cu_3O_{7-x}$

  • Lee, Cheol-Eui;White, D.;Davies, P.K.;Moon, B.M.;Sung, M.Y.;Park, J.H.;Kim, B.H.
    • Journal of Magnetics
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    • 제1권1호
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    • pp.1-3
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    • 1996
  • The $YBa_2Cu_3O_{7-x}$ structure has been fluorinated by a gas phase exchange technique. The ${^19}F$NMR (nuclear magnetic resonance) spin-lattice relaxation rate (1/T1) measurements on a fluorinated sample gave superconducting energy gap of $2\Delta=4.6kT_c$.

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Judet`s strut를 이용한 흉벽요동 치료;6례 보고 (Treatment of flail chest with Judet`s struts)

  • 이현재
    • Journal of Chest Surgery
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    • 제26권10호
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    • pp.812-814
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    • 1993
  • Six patients with flail chest were performed operative stabilization with Judet`s Struts.The indications of opertive stabilization were exploratory thoracotomy or laparotomy in 4 patients, and severe chest pain due to displaced ribs which deteriorated respiratory pattern and gas exchange in 2 patients. After operation, all patients became comfortable and complained less pain.Two patients restored spontaneous breathing without ventilator therapy and 2 patients were ventilated during 4 days and 5 days, respectively.There were no morbidity and mortality related to operative stabilization.

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19F NMR Study of Fluorinated YBa2Cu3O7-x

  • Lee, Cheol-Eui;D. White;P. K. Davies;S. J. Noh
    • Journal of Magnetics
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    • 제2권2호
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    • pp.35-37
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    • 1997
  • A sample of YBa2Cu3O7-x fluorinated by a high temperature (400$^{\circ}C$) gas exchange technique has been investigated by means of 19F NMR (nuclear magneti resonance) measurements in both superconducting and normal state. As a result, behaviors characteristic of the superconductor, including a peculiarity in the spin-lattice relaxation rate (1/T1) around 250 K, were observed.

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