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RISS 인기검색어
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- 저자 : 전승곤(Seunggon Jeon) (검색결과 22 건)
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기계학습 및 네트워크 기반 상병-처방 추천 모델 및 시스템 개발
전승곤(Seunggon Jeon),임소영(Soyoung Rhim),한경식(Kyungsik Han) 한국HCI학회 2018 한국HCI학회 학술대회 Vol.2018 No.1
오늘날 병원에서는 매일 방대한 양의 환자 데이터가 생성된다. 특히 상병과 처방에 대한 기록은 국가적으로 관리 및 검토되고, 모든 병원은 상병과 처방에 대한 기록을 매년 보고하도록 되어 있어, 상병-처방 기록 및 관리는 매우 중요하다. 그러나 우리는 현재의 상병과 처방 기록 관리 시스템에는 상병과 처방의 관계 파악에 대한 두가지 제약사항(정보 누락 및 관계 파악)이 존재하는 것을 확인했다. 이를 해결하기 위해 우리는 기계학습 및 네트워크 기반의 높은 성능을 가지는 상병-처방 추천 모델을 구축하였고, 추천 시스템을 개발하였다.
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전단형 MR 댐퍼를 이용한 케이블 교량의 실시간 진동제어-파워 모델 및 리야프노브 제어 중심으로
허광희,이진옥,전승곤,김충길,전준용,Heo, Gwanghee,Lee, Chinok,Jeon, Seunggon,Kim, Chunggil,Jeon, Joonryong 한국지진공학회 2017 한국지진공학회논문집 Vol.21 No.5
In this paper, an experimental study was carried out for vibration control of cable bridges with structurally flexible characteristics. For the experiment on vibration control, a model bridge was constructed by reducing the Seohae Grand Bridge and the shear type MR damper was designed using the wind load response measured at Seohae Grand Bridge. The shear type MR damper was installed in the vertical direction at the middle span of the model bridge, and dynamic modeling was performed using the power model. The tests of the vibration control were carried out by non-control, passive on/off control and Lyapunov control method on model bridge with scaled wind load response. The performance of the vibration control was evaluated by calculating absolute maximum displacement, RMS displacement, absolute maximum acceleration, RMS acceleration, and size of applied power using the response (displacement, acceleration, etc.) from the model bridge. As a result, the power model was effective in simulating the nonlinear behavior of the MR damper, and the Lyapunov control method using the MR damper was able to control the vibration of the structure and reduce the size of the power supply.
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허광희 ( Heo Gwanghee ),전준용 ( Jeon Joonryong ),김충길 ( Kim Chunggil ),전승곤 ( Jeon Seunggon ),이진옥 ( Lee Chin Ok ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
This paper is concerned with an experimental research to control vertical vibration caused by moving loads specially in cable-stayed bridges which tend to be structurally flexible. Experimenting on a reduced structure modelled on Seohae Grand Bridge, we inflicted a reduced form of Elcentro wave on the model structure to a proper proportion. On the center of its middle span, we placed a shear type MR damper which was to control its vibration and also acquire its structural responses such as displacement and acceleration at the same site. The experiments concerning controlling vibration were performed according to a variety of theories including uncontrol, passive control, on-ff control, and Lyapunov stability theory. Its control performance was evaluated in terms of the peak absolute displacements and the peak absolute accelerations which differ from each different experiment method. Among all the methods applied in this paper, Lyapunov control method turned out to be the most effective, and the passive on control and then the passive-off control method were followed in effectiveness. It was noteworthy that Lyapunov control method was specially effective in the vibration control employing a semi-active damper such MR damper in terms of economy and efficiency.
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롤러코스터의 결함검출을 위한 모형 구조물의 3차원 거동특성 분석
허광희 ( Heo Gwanghee ),전승곤 ( Jeon Seunggon ),손동진 ( Sohn Dongjin ),김충길 ( Kim Chunggil ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
This research aims at the development of a structural damage detection method for roller coaster. In this paper particularly, the behavior characteristics of peculiar structure like roller coaster are three-dimensionally identified, and later a baseline structure is built to be used for structural damage detection. As a target structure, the roller coaster located at Seoul Children's Grand Park is chosen and its miniature model is produced by one over twenty in reduced proportion. On the model, a three-dimensional FE analysis is done, and its result is compared with that of modal experiment. The comparison verifies the excellence of the mathematical analysis model. As a result, the dynamic characteristics of special mode is found ultimately for damage detection, and its value obtained here is provided for the basic structure as a primary source.
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허광희(Heo, Gwanghee),전준용(Jeon, Joonryong),김충길(Kim, Chunggil),전승곤(Jeon, Seunggon),이진옥(Lee, Chin Ok) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
This paper is concerned with an experimental research to control vertical vibration caused by moving loads specially in cable-stayed bridges which tend to be structurally flexible. Experimenting on a reduced structure modelled on Seohae Grand Bridge, we inflicted a reduced form of Elcentro wave on the model structure to a proper proportion. On the center of its middle span, we placed a shear type MR damper which was to control its vibration and also acquire its structural responses such as displacement and acceleration at the same site. The experiments concerning controlling vibration were performed according to a variety of theories including uncontrol, passive control, on-ff control, and Lyapunov stability theory. Its control performance was evaluated in terms of the peak absolute displacements and the peak absolute accelerations which differ from each different experiment method. Among all the methods applied in this paper, Lyapunov control method turned out to be the most effective, and the passive on control and then the passive-off control method were followed in effectiveness. It was noteworthy that Lyapunov control method was specially effective in the vibration control employing a semi-active damper such MR damper in terms of economy and efficiency.
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김충길(Kim, Chunggil),허광희(Heo, Gwanghee),전준용(Jeon, Joonryong),전승곤(Jeon, Seunggon),오주원(Oh, Juwon) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.2
This paper is concerned with the control of the harmful vertical vibration occurring on a cable-stayed bridge, a type of large structure bridges. For the control, we designed a model structure of the bridge and a shear type MR damper. With those, vibration control experiments were performed and evaluated under various conditions: non-control, clipped-optimal control, and passive off and passive on the last two of which were added to evaluate the clipped-optimal control. As a result of the experiments, displacement and acceleration on the middle span were obtained, and from those were derived maximum displacement and maximum acceleration by which control performance was also evaluated. Additionally, each different voltage consumed at the moment of control was compared each other. Finally, it is proven that the clipped-optimal control method was functionally and economically effective in the case where such a semi-active control device as MR damper was employed in the control of a cable-stayed bridge.
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