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통계적 분석기법을 이용한 디젤기관의 고장진단 방법에 관한 연구
김영일,오현경,유영호,Kim, Young-Il,Oh, Hyun-Kyung,Yu, Yung-Ho 한국마린엔지니어링학회 2006 한국마린엔지니어링학회지 Vol.30 No.2
Almost ship monitoring systems are event driven alarm system which warn only when the measurement value is over or under set point. These kinds of system cannot warn until signal is growing to abnormal state that the signal is over or under the set point. therefore cannot play a role for preventive maintenance system. This paper proposes fault diagnosis method which is able to diagnose and forecast the fault from present operating condition by analyzing monitored signals with present ship monitoring system without any additional sensors. By analyzing the data with high correlation coefficient(CC), correlation level of interactive data can be defined. Knowledge base of abnormal detection can be built by referring level of CC(Fault Detection CC. FDCC) to detect abnormal data among monitored data from monitoring system and knowledge base of diagnosis built by referring CC among interactive data for related machine each other to diagnose fault part.
김영일,오현경,유영호,Kim, Young-Il,Oh, Hyun-Kyung,Yu, Yung-Ho 한국마린엔지니어링학회 2006 한국마린엔지니어링학회지 Vol.30 No.2
There is few study which automatically diagnoses the fault from ship's monitored data. The bigger control and monitoring system is. the more important fault diagnosis and maintenance is to reduce damage caused by system fault. This paper proposes fault diagnosis system using a correlation analysis algorithm which is able to diagnose and forecast the fault from monitored data and is composed of fault detection knowledge base and fault diagnosis knowledge base. For all kinds of ship's engine room monitored data are classified with combustion subsystem, heat exchange subsystem and electric motor and pump subsystem, To verify capability of fault detection, diagnosis and prediction, FMS(Fault Management System) is developed by C++. Simulation by FMS is carried out with population data set made by the log book data of 2 months duration from a large full container ship of H shipping company.
김영일 ( Young Il Kim ),지수영 ( Su Young Chi ),반희정 ( Hee Jung Ban ),주진영 ( Jin Yung Ju ),권용수 ( Yong Soo Kwon ),오인재 ( In Jae Oh ),김규식 ( Kyu Sik Kim ),김유일 ( Yu Il Kim ),김영철 ( Young Chul Kim ),임성철 ( Sung Chul 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.65 No.5
Factitious hemoptysis is the bleeding type of Munchausen`s syndrome, and this describes a group of patients who intentionally produce symptoms. Because factitious hemoptysis is a very rare manifestation of hemoptysis, it generally passes unnoticed. We report here on a case of factitious hemoptysis in a 15-year-old boy who presented with hemoptysis. During his three hospitalizations, we conducted many diagnostic procedures, including chest CT, laryngoscopy, bronchoscopy and bronchial arteriography, yet we failed to find the definitive cause of the patient`s hemoptysis. He kept on complaining of repetitive hemoptysis and seizure-like activity. His father discovered that he had collected his blood into the specimen cup via an intravenous line. After we removed the intravenous line, he did not show blood to us again. We suggest that factitious hemoptysis should be considered in the differential diagnosis of hemoptysis of an unclear bleeding focus, and especially when the patient has a bizarre hospital course or unusual behavior. We also include a review of the relevant literature. (Tuberc Respir Dis 2008;65:396-399)
전력선 통신을 이용한 가정용 원격 검침 시스템에 관한 연구
신일식(Il-Sik Shin),오현경(Hyun-Kyung Oh),김영일(Il-Yung Kim),천행춘(Han-Choon Chun),유영호(Yung-Ho Yu) 한국마린엔지니어링학회 2004 한국마린엔지니어링학회 학술대회 논문집 Vol.2004 No.-
In this paper telemetering system for home automation is proposed and implemented. Proposed and developed systems are composed with server and a few clients and measure usage of gas, electric power, water and check home security. Server collects all kinds of measure data using power line communication from client systems which sense rotation of various measurement meters by micro reed switch. A simple ASK method is used for power line communication. Sever system has internet port to send a data for remoter monitoring via UDP protocol. The experiments were carried out under laboratory environment using various kinds of electric home appliances to ascertain the performance.