http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
몽골 울란바토르시 게르촌 주택의 겨울철 실내 초미세먼지(PM 2.5 ) 농도의 시간적 변이
이보람(Boram Lee),이지영(Jiyoung Lee),장예림(Yelim Jang),김윤지(Yoonjee Kim),하헌성(Hunsung Ha),이우석(Wooseok Lee),최우석(Wooseok Choe),김규성(Kyusung Kim),우철운(Cheolwoon Woo),Chimedsuren Ochir,이기영(Kiyoung Lee) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.1
Objectives: In Mongolian housing, they use coal as a fuel for indoor heating and cooking. The combustion of coal releases particulate matter, which can affect indoor air quality. The purpose of this study was to analyze the concentrations of indoor PM 2.5 Methods: In this study, indoor PM 2.5 concentrations, temperature and humidity in houses were measured by a real-time PM monitor, while the time activity patternsof the residents were also observed. Results: The correlation between factors that may affect the indoor air quality was analyzed.The indoor PM 2.5 concentrations were 178.4±152.7 µg/m 3 (n=37). Five types of indoor PM 2.5 concentrations have been classified, which were associated with indoor activity. The stove type, fuel types and indoor activities such as cleaning, cooking and opening the stoves were not significantly associated with indoor PM 2.5 levels. Conclusions: Further study is needed to determine the effect of stove type through 24hours of indoor air quality monitoring.
무인비행기 직렬 하이브리드 추진 시스템에서의 효율적인 배터리 공급을 위한 알고리즘 개발
박규성(Kyusung Park),이한상(Hansang Lee),박홍주(Hongjoo Park),진원준(Wonjoon Jin),이근호(Geunho Lee) 제어로봇시스템학회 2017 제어·로봇·시스템학회 논문지 Vol.23 No.3
Recently, the number of use of unmanned airplanes has been increased, and studies have been conducting to increase the cruising time. In the case of an unmanned airplane with a small capacity, the motor is used to drive the propeller instead of using the engine. And it uses the battery to drive the propeller motor. Instead of reducing the weight of the battery, it can be increased the cruising time by adding engines, generators and converters and performing power generation control. In this paper, we installed a current sensor between the BLDC motor drive and the battery. the algorithm that perform efficient power generation control according to the power required by the propeller is developed. And it can adjust the amount of regenerating electric power. We proposed a power generation algorithm that regenerates in response to load fluctuations, and verified it through simulations and experiments.
정규성(Kyusung Jung),양준모(Junmo Yang),이상철(Sangchul Lee),이용식(Yongsik Yi),이재욱(Jaewook Lee) 한국항공우주학회 2018 韓國航空宇宙學會誌 Vol.46 No.4
본 논문은 항공기 보조연료탱크에서 연료량을 측정하는 센서 위치를 최적화하는 설계를 보여준다. 항공기의 임무반경을 증가시키기 위해 활용되는 보조연료탱크에서 보조연료탱크내의 연료량을 측정하는 센서 위치는 측정 정확도를 결정하는 중요한 설계변수이다. 본 연구에서는 연료가 센서에 접촉되지 않아 측정하지 못하는 연료량, 즉 측정불가 연료량의 최소화를 목적함수로 설정하여 센서 위치를 최적설계 하였다. 항공기 보조연료탱크의 CATIA 형상 모델을 단순화한 근사모델에서 센서 위치에 따른 측정불가 연료량을 계산하고, MATLAB의 최적화 Solver와 연동하여 최적설계를 수행하였다. 설계 결과 얻은 최적 센서위치는 Parametric study를 통해 얻은 결과와 비교하여 검증하였다. This paper presents the design optimization of fuel sensor location used to measure remained fuel amount in aircraft conformal fuel tank. The conformal fuel tank is utilized to expand the mission range in airplane, and the sensor location is a critical design variable determining the measurement accuracy. In this work, the sensor location is optimized to minimize unmeasurable fuel amount due to non-contact between fuel and sensor. The simplified model is prepared from the conformal fuel tank CATIA model, and the unmeasurable fuel amount is calculated. Then, the optimization is performed using MATLAB optimization solver. The optimized sensor location is validated by comparing with the location obtained using parametric study.
영구자석형 동기발전기의 회전자 위치검출 센서의 옵셋 검출에 관한 연구
박규성(Kyusung Park),신성환(Sung-Hwan Shin),이호광(Hokwang Lee),윤영득(Youngdeuk Yoon),이근호(Geunho Lee) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.9
In this paper, an algorithm is suggested to detect an offset angle of the absolute rotor position sensor after the initial assembly of a PMSG. Unlike previous studies in a stationary state, this one is not designed to detect an electrical angle but rather the absolute position of the rotor is detected while operating the generator. Also,a position sensor, current sensors and voltage sensor were used to ensure reliability. This technique completes the detection of the sensor offset in two steps. In the first step, a zero-crossing of the EMF is measured using a voltage sensor to detect the electrical angle offset when the alternator is actuated by the engine. In the second step, a high frequency current is injected along the d-axis on-line during the control of the generation, eventually to obtain the inductance using a DFT (Discrete Fourier Transform), and then to ultimately extract the final electrical angle offset through the comparison of the inductance magnitude. The suggested algorithm was validated with PSIM simulation and, furthermore, was tested with actual experiments on a dynamometer.
과학고등학교 학부모와 학생의 학교만족도 및 학교 선택 요인에 관한 연구
이영주(Young Ju Lee),최진수(Jinsu Choi),이범진(Bumjin Yi),이규성(Kyusung Lee) 한국영재학회 2020 영재교육연구 Vol.30 No.4
본 연구는 특수목적고등학교이자 별도의 학생 선발 과정을 가지는 과학고 학생 및 학부모를 대상으로 고등학교 학교 선택요인을 살펴보고 학교에 대한 만족도를 살펴보고자 하였다. 이를 위해 과학고에 재학 중인 학생과 학부모를 대상으로 설문조사를 실시한 후 대응되는 총 59쌍의 설문결과를 분석하였다. 그 결과, 학부모가 학생들보다 진학 준비 활동에 더 많이 참여하고 있었으며, 진학에는 부모와 자녀의 의견이나 중학교 교사의 상담, 고등학교 직접 방문이 도움이 되는 것으로 나타났다. 둘째, 학부모는 학생보다 학교선택 시 학생선발방법, 연구 활동, 우수교육 프로그램, 학교위치, 학교의 역사와 명성, 장학금 및 경제적 지원을 더 중요하게 고려하는 것으로 나타났다. 셋째, 과학고에 대한 학교 만족도는 학생과 학부모 모두 높은 것으로 나타났으며, 특히 학생은 학부모에 비해 수업에 대한 만족도가 더 높은 것으로 나타났다. 본 연구 결과를 바탕으로 과학고의 운영방안 개선을 위한 시사점을 제공해 줄 것으로 기대한다. The purpose of this study was to analyze the opinions of parents and students regarding science high school selections and school satisfaction. For this study, 104 students and 63 parents from 20 science high schools participated. The results showed that both parents and students collected information from diverse sources for school choice, but the opinion of parents and children, counseling with middle school teacher and high school visits were helpful when it came to school choice. Secondly, there are multiple factors to consider when choosing a school including the identification process, research activity, special educational program, location, history, reputation, and scholarship and economic fund between parents and students.. Ultimately, students showed higher satisfaction of class than parents. The results of this study were expected to be used as basic data to encourage future improvement in science high schools.