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지열 히트펌프 시스템의 데이터 마이닝 기반 성능 예측 기술
황민혜,박명규,전인기,손병후,Hwang, Min Hye,Park, Myung Kyu,Jun, In Ki,Sohn, Byonghu 대한기계학회 2016 대한기계학회 논문집. Transactions of the KSME. C, 산업기술과 혁신 Vol.4 No.1
지열 시스템을 대상으로 데이터 마이닝 기반 성능 예측 모델을 구축하였다. 지열 시스템의 실시간 성능 분석과 예측에 필요한 데이터의 기본 조건을 검토한 후, 데이터베이스의 구조를 설계하였다. 먼저 시스템 성능계수(COP)와 전력 소비량을 분석 대상으로 설정한 후, 이들 물리량의 추출 주기(1분 5분 10분 30분 60분 간격)가 예측 결과에 미치는 영향을 분석하였다. 이어서 범주형과 수치형 의사결정나무 모델을 적용하여 시스템의 성능을 예측하였다. 범주형 의사결정나무 모델을 적용했을 때, 10분 주기의 예측 결과의 정확도는 97.7%로 가장 높았다. 또한 수치형 의사결정나무 분석 결과를 통해 COP가 변하는 순간의 임계값을 찾을 수 있었다. 본 논문에서 제안한 방법은 지열 시스템의 실시간 성능 분석과 운전 상태 등에 적용할 수 있을 것으로 판단된다. This preliminary study investigated data mining-based methods to assess and predict the performance of geothermal heat pump(GHP) system. Data mining is a key process of the knowledge discovery in database (KDD), which includes five steps: 1) Selection; 2) Pre-processing; 3) Transformation; 4) Analysis(data mining); and 5) Interpretation/Evaluation. We used two analysis models, categorical and numerical decision tree models to ascertain the patterns of performance(COP) and electrical consumption of the GHP system. Prior to applying the decision tree models, we statistically analyzed measurement database to determine the effect of sampling intervals on the system performance. Analysis results showed that 10-min sampling data for the performance analysis had highest accuracy of 97.7% over the actual dataset of the GHP system.
황민혜(Hwang Min-Hye),임석재(Yim Seok-Jae) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.11
The purpose of this study is to abstract the feature of the centralized architectural plan of Leonardo da Vinci and to find its contribution to the Renaissance period. First of all, his drawings are analysed to derive his unique methodology with its sequence of 'observation of the architectures in centralized plan → examination on the variations of the centralized plan → systemization of the drawing method for the centralized plan'. Next, his centralized plan sketch with its methodology is studied to find how it conducts as an 'object' and how it is seen by a human 'Subject'. And the phenomena which newly appeared in Renaissance period, and their influence to the Modern meaning of Geometry will be verified. Finally, in the last chapter, its contribution to the Renaissance period is discussed.
프란체스코 디 지오르지오 마르티니의 건축 드로잉에 나타난 인체에 관한 연구
황민혜(Hwang Min-Hye),임석재(Yim Seok-Jae) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.3
The purpose of this study is to analyze Francesco di Giorgio Martini's architectural drawings of 'human analogy' on the basis of historical background and to find out the relationship with Renaissance Humanism. Most of his architectural drawings are based on Vitruvius's theory. However, there was a gap about 1500 years between Francesco di Giorgio and Vitruvius. There were also mistranslations. For example, He translated Vitruvius's Human in Circle as anthropomorphism It is the difference which is a key also key to understand his drawing characteristics, on which this study will be largely based. His distinctive drawings and architectural theory will be seen in the concept of a priori ; the method of geometric division and the analogy of human body as functions of urban and architectural planning.
레온 바티스타 알베르티와 레오나르도 다 빈치의 중앙집중형 평면에 관한 비교 연구
황민혜(Hwang, Min-Hye),임석재(Yim, Seok-Jae) 대한건축학회 2011 대한건축학회논문집 Vol.27 No.11
This is a comparative study in the centralized plans between L.B.Alberti’s and Leonardo da Vinci’s. The shapes of their centralized-plans have been regarded quite similar. Above all, R. Wittkower wrought in 《Architectural Principle in the Age of Humanism》that their relationship was clear, because of their similarity of shapes. So the purpose of this study is to compare the L.B. Alberti’s centralized plans with the Leonardo da Vinci’s by analyzing the theory of L.B. Alberti’s 《de re aedificatoria》and Leonardo da Vinci’s sketches in his Codices. The Process of this study is as following, First, the drawing process of each centralized plan will be simulated. Second, the methodological difference to draw one central geometry will be discussed. Third, developed geometries added to one central geometry will be studied. And last, each system that governs each shape of centralized plan will be found.