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김진성,장우찬,이상문 한국품질경영학회 2022 한국품질경영학회 학술대회 Vol.2022 No.1
스마트 팩토리는 공장 내 설비와 기계에 센서가 설치되어 데이터가 실시간으로 수집, 분석되는 공장이다. 각 산업 분야에서는 제품 생산을 위한 공정을 가동하며, 공정에 사용하는 설비 및 기계 등에서 다양한 제조 데이터를 획득할 수 있다. 이 때, 발생한 제조 데이터 분석으로 이상 신호를 탐지하여 생산 공정 이상 유무를 판단할 수 있어, 이에 관한 연구가 활발히 진행되고 있다. 본 논문에서는 공정 데이터 중 시계열 데이터의 이상 신호 탐지 방법론을 소개한다. 시계열 데이터 분석을 위한 통계적 데이터 분석 기법 중 스무딩 필터를 실제 공정 데이 터에 적용하여 이상 신호 검출한 결과 사례를 소개한다. 향후, 시계열 데이터를 다양한 이상 신호 검출 방법 발굴 및 방산 제조업 적용 사례를 연구하여 국방 품질 향상에 이바지하고자 한다.
이상문,김현주,정선용,황정민 대한안과학회 2013 대한안과학회지 Vol.54 No.1
Methods: Clinical records of 5 patients who were referred to the pediatric ophthalmology clinic of Seoul National University Bundang Hospital after diagnosis of Gaucher disease at the genetics clinic of Ajou University Hospital between 2007 and 2008 were retrospectively reviewed. Results: Five patients with type 3 Gaucher disease had hepatosplenomegaly and oculomotor apraxia, and 4 patients had growth and developmental delay. The most commonly detected genetic mutation was L444P. In addition, P201H, F2131, R257Q, and D315E+Rec 1b were identified. Five patients had oculomotor apraxia and limitation of abduction, and 4 patients had esotropia. One of the 4 patients who showed combined limitation of abduction, oculomotor apraxia, and esotropia, yet did not have growth and developmental delay. Conclusions: Most of the patients who were referred for ocular motor abnormalities with Gaucher disease showed a limitation of abduction, oculomotor apraxia, and esotropia. In patients with a limitation of abduction, oculomotor apraxia, and esotropia, Gaucher disease should be considered. Ophthalmologic examination is essential for subtyping and prognosing Gaucher disease.
의료시설 에너지절약 운영방법 도출을 위한 사례분석을 통한 에너지 영향요소 분석
이상문,조진균 한국태양에너지학회 2019 한국태양에너지학회 논문집 Vol.39 No.2
Because the hospital building operates 24 hours a day, 365 days a year for treatment and restoration of patients, it has a different pattern of energy use than that of ordinary buildings. Hospitals contribute to energy consumption and have a negative environmental impact. This study aims to find how meaningful energy performance, reflecting good energy management and ECMs, can be operated for hospital buildings, a category encompassing complex buildings with different systems and large differences between them. In this study, we proposed the energy diagnosis & evaluation method and energy management process to verify energy saving through operation data based on system & facility characteristics, operation pattern and energy consumption characteristics of hospital building. Energy consumption structures were surveyed throughout 4 reference hospital in Seoul, Korea. Findings confirm that different hospital departments have hugely different energy-demand profiles. Energy efficiency and energy saving potentials are presented. The energy performance analysis can be applied to a wide range of problems in energy-system operation.
Robust Model Predictive Control Using Polytopic Description of Input Constraints
이상문 대한전기학회 2009 Journal of Electrical Engineering & Technology Vol.4 No.4
In this paper, we propose a less conservative a linear matrix inequality (LMI) condition for the constrained robust model predictive control of systems with input constraints and polytopic uncertainty. Systems with input constraints are represented as perturbed systems with sector bounded conditions. For the infinite horizon control, closed-loop stability conditions are obtained by using a parameter dependent Lyapunov function. The effectiveness of the proposed method is shown by an example.