• 제목/요약/키워드: D.B.H. analysis

검색결과 1,378건 처리시간 0.068초

플라이백 컨버터의 Differential Mode 전도전자파장해 분석 (Analysis of Conducted Differential Mode EMI in Flyback Converter)

  • 민승현;이동영;조보형;이병화
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1998년도 하계학술대회 논문집 F
    • /
    • pp.1879-1881
    • /
    • 1998
  • The conducted differential mode (DM) EMI in a flyback converter are analyzed. Circuit modeling of passive components and PCB pattern for the EMI simulation are presented. Using the model, high frequency noise path is analyzed. The analyses are verified with simulations by identifying the peakings of the EMI pattern.

  • PDF

H.B. Robinson-2 pressure vessel dosimetry benchmark: Deterministic three-dimensional analysis with the TORT transport code

  • Orsi, Roberto
    • Nuclear Engineering and Technology
    • /
    • 제52권2호
    • /
    • pp.448-455
    • /
    • 2020
  • The H.B. Robinson Unit 2 (HBR-2) pressure vessel dosimetry benchmark is an in- and ex-Reactor Pressure Vessel (RPV) neutron dosimetry benchmark based on experimental data from the HBR-2 reactor, a 2300-MW PWR designed by Westinghouse and put in operation in March 1971, openly available through the SINBAD Database at OECD/NEA data Bank. The goals of the present work were to carry out three-dimensional (3D) fixed source transport calculations in both Cartesian (X,Y,Z) and cylindrical (R,θ,Z) geometries by using the TORT-3.2 discrete ordinates code on very detailed 3D HBR-2 geometrical models and to test the latest broad-group coupled (47 neutron groups + 20 photon groups) working cross section libraries in FIDO-ANISN format with same structure as BUGLE-96, such as BUGJEFF311.BOLIB, BUGENDF70.BOLIB and BUGLE-B7. The results obtained with all the cited libraries were satisfactory and are here reported and compared.

LNG 저장탱크용 멤브레인 개발을 위한 유한요소해석 (The FEM Analysis of Membrane for LNG Storage Tank)

  • 오병택;김영균;홍성호;윤인수;서흥석
    • 한국가스학회지
    • /
    • 제6권4호
    • /
    • pp.47-52
    • /
    • 2002
  • 멤브레인은 LNG온도에 따른 열수축과 팽창을 흡수하는 주름을 가지고 있는 스테인레스판으로 저장탱크 내부에 설치된다. 유한요소 해석법을 적용하여 LNG저장탱크용 멤브레인을 개발하였다. 액압 및 온도 하중 조건에 따른 멤브레인 주름부의 변형 거동 특성 및 강도 그리고 앵커 고정부의 반력을 구하였고 이 해석 데이터를 바탕으로 멤브레인의 안정성과 피로강도를 확인하였다.

  • PDF

살충제 O,O-diethyl-O-(1-phenyl-3-trifluoromethylpyrazol-5-yl)-phosphorothioate(Flupyrazofos)의 가수분해 반응 메커니즘 (Kinetics and hydrolysis mechanism of insecticide O,O-diethyl-O-(1-phenyl-3-trifluoromethylpyrazol-5-yl)phosphorothioate (Flupyrazofos))

  • 성낙도
    • 농약과학회지
    • /
    • 제6권3호
    • /
    • pp.218-223
    • /
    • 2002
  • [ $45^{\circ}C$ ]의 25%(v/v) dioxane-수용액(${\mu}=0.1M$) 중에서 살충제, flupyrazofos의 가수분해 반응속도상수를 자외선 분광법으로 측정하였다. 용매효과($|m|{\ll}|{\ell}|$) 및 반응 속도식($k_{obs.}=k_O+k_{H3O}+[H_3O^+]+k_{OH}-Kw/[H_3O^+]$) 그리고 생성물 분석 결과로부터 flupyrazofos는 trigonal-bipyramidal형($d^2sp^3$) 중간체를 경유하여 pH 4.0 이하의 산성 용액에서는 $A_{AC}2$형의 특정 산-촉매 반응, pH 11.0 이상의 알카리성 용액에서는 $B_{AC}2$ 형의 특정 염기-촉매 반응 그리고 PH $5.0{\sim}10.0$ 사이에서는 $B_{AC}2$형의 일반 산 및 염기-촉매반응에 따른 일련의 가수분해 반응 메카니즘을 제안하였다. 또한, 중성 용액 중에서 flupyrazofos는 매우 안정한 ($8.0{\times}10^{-8}sec^{-1}$) 화합물로 반감기는 약 3개월($45^{\circ}C$) 이상이었다.

중국(中國) 절강성(浙江省) 영파지역(寧波地域) 남성(男性)의 체형연구(體形硏究) (Body Types of Adult Males in the Ningbo Area of Zhejiang Province in China)

  • 심부자
    • 패션비즈니스
    • /
    • 제11권1호
    • /
    • pp.108-124
    • /
    • 2007
  • Body measurement was held for the subjects of Chinese adult males in their 20s through 40s residing in the Ningbo area of Zhejiang Province in order to provide body type information and raise the fit of clothing products for the advancement into the Chinese market. The following sums up the analysis of body types based on body measurement: 1. Seven factors to compose body types were produced from the analysis of males in their 20s, explaining 76.07% of variables and representing 3 types according to cluster analysis. Type 1 was H-b and appeared as much as 32.14%. Type 2, semi X-d, was 40.81%, while Type 3, A-i, had 27.04%. 2. Eight body type composing factors were extracted from the analysis of men in their 30s and 40s. The factors explained 76.77% of all the variables and represented 4 types according to cluster analysis. Type 1, H-d, had the appearance rate of 18.47%; Type 2, H-b, 40.84%; Type 3, Y-i, 27.71%; and Type 4, semi X-s, 11.95%.