• 제목/요약/키워드: KUH

검색결과 212건 처리시간 0.025초

Hydraulics of a two-layer rotating flow; Application to the Korea Strait

  • Cho, Yang-Ki;Kim, Kuh
    • 한국해안해양공학회:학술대회논문집
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    • 한국해안해양공학회 1995년도 정기학술강연회 발표논문 초록집
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    • pp.9-12
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    • 1995
  • The Korea Strait becomes deeper than 200 m from south to north in general except coastal area, whereas its southern part is shallower than 125 m except for a deep trough (Fig.1). The flow in the Korea Strait could be simplified as two layers (Isobe, 1995); the Tsushima Warm Water in the upper layer and the Korea Strait Bottom Cold Water (KSBCW) in the lower layer (Fig.2). (omitted)

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Vortex Shedding을 고려한 Tower Flange 설계 (Tower Flange Design Considering Vortex Shedding)

  • 이현주;최원호;이승구
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2005년도 춘계학술대회
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    • pp.68-71
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    • 2005
  • In the case of wind turbine design, Optimization of tower structure is very important because tower generally takes about $20\%$ of overall turbine cost. In this paper, we calculated wind loads considering vortex shedding, and optimized tower flange using the calculation results. For optimization, we used FEM to analyze structural strength of the flange and blade momentum theory to calculate wind loads.

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능형 회귀에서의 민감도 분석에 관한 연구 (A Study on Sensitivity Analysis in Ridge Regression)

  • Kim, Soon-Kwi
    • 품질경영학회지
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    • 제19권1호
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    • pp.1-15
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    • 1991
  • In this paper, we discuss and review various measures which have been presented for studying outliers, high-leverage points, and influential observations when ridge regression estimation is adopted. We derive the influence function for ${\underline{\hat{\beta}}}\small{R}$, the ridge regression estimator, and discuss its various finite sample approximations when ridge regression is postulated. We also study several diagnostic measures such as Welsh-Kuh's distance, Cook's distance etc.

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DFIG 풍력발전시스템에 관한 연구 (Study on Doubly Fed Induction Generator in a wind turbine)

  • 한상열;차삼곤;최원호;이승구
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2006년도 춘계학술대회
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    • pp.253-256
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    • 2006
  • This paper shows operating characteristics of DFIG(Double Fed Induction Generator) for wind turbine. The back to back PWM voltage-fed inverter connected between the rotor and grid network operated sub and super-synchronous operating mode, and the vector-controlled DFIG enables the decoupling between active and reactive power as well as between torque and power factor. This paper is validated by simulations and experimental results.

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