http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
100 kg/day 액화수소 제조시설용 Ortho-Para 변환기의 설계 및 성능평가
양성민(Seong Min Yang),박주형(Joo Hyoung Park),이병무(Byeong Moo Lee),김서영(Seo Yong Kim),홍동희(Dong Hui Hong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This Ortho-Para hydrogen converter was designed for application to actual hydrogen liquefaction facility. The conversion device converts Ortho hydrogen into Para hydrogen after heat exchange of between hydrogen and liquefied nitrogen in a pre-cooler before liquefaction. The performance of this converter was evaluated by the enthalpy change between the inlet line and the out line. The converter is filled with 600 cc by selecting iron oxide(Fe₂O₃) as a catalyst. The conversion rates were compared for each flow range[0.1 to 0.6 m3/min (H₂ @ 293 K, 1 atm)]. Overall, as the flow rate of hydrogen increased, the conversion rate decreased. However, as the flow rate increased, a slight temperature decrease of hydrogen occurred, and there were a section in which the conversion rate increased due to an increase in the equilibrium point of ratio of Para.
모바일 학생증을 이용한 아두이노 기반의 출입통제 시스템
양성민 ( Seong-min Yang ),황경하 ( Kyung-ha Hwang ),금진수 ( Jin-soo Keum ),이지수 ( Ji-su Lee ),전중남 ( Joong-nam Jeon ) 한국정보처리학회 2014 한국정보처리학회 학술대회논문집 Vol.21 No.2
본 시스템은 스마트폰 어플리케이션과 아두이노 보드, 웹서버로 구성된 시스템으로서, 학생들이 보다 편리하게 교내 건물에 출입 할 수 있게 하기 위해서 개발하였다. 학생들이 플라스틱 카드로 만들어진 학생증 없이도 스마트폰 어플리케이션으로, 교내 건물에 출입 할 수 있는 기능을 제공함으로써 많은 플라스틱 카드를 대체할 것으로 생각된다. 이를 통해 플라스틱 카드를 따로 가지고 다니지 않아도 되는 편의성을 제공하며 학생증 분실 위험도 막을 수 있다. 또한 플라스틱 카드 제작을 줄여 친환경의 Green IT를 실현할 수 있다. 학생인증 방법은 스마트폰 어플리케이션에서 종합정보시스템 상의 학번과 비밀번호를 입력하면 서버에서 일치 여부를 확인하여 로그인 승인을 해준다. 이후 블루투스 통신을 통해 아두이노 보드에 출입 요청을 보내면 아두이노 보드에 연결된 모터로 문을 개폐한다. 이외에 학생증의 본래 기능인 학생 증명 기능과 학생증으로 이용할 수 있는 제휴업체의 정보도 제공한다.
100 kg/day 액화수소 제조시설용 Ortho-Para 변환기의 설계 및 성능평가
양성민(Seong Min Yang),박주형(Joo Hyoung Park),이병무(Byeong Moo Lee),김서영(Seo Yong Kim),홍동희(Dong Hui Hong) 대한설비공학회 2022 대한설비공학회 학술발표대회논문집 Vol.2022 No.6
This Ortho-Para hydrogen converter was designed for application to actual hydrogen liquefaction facility. The conversion device converts Ortho hydrogen into Para hydrogen after heat exchange of between hydrogen and liquefied nitrogen in a pre-cooler before liquefaction. The performance of this converter was evaluated by the enthalpy change between the inlet line and the out line. The converter is filled with 600 cc by selecting iron oxide(Fe₂O₃) as a catalyst. The conversion rates were compared for each flow range[0.1 to 0.6 m3/min (H₂ @ 293 K, 1 atm)]. Overall, as the flow rate of hydrogen increased, the conversion rate decreased. However, as the flow rate increased, a slight temperature decrease of hydrogen occurred, and there were a section in which the conversion rate increased due to an increase in the equilibrium point of ratio of Para.
양성민(Yang, Seong-min) 국방부 군사편찬연구소 2021 군사 Vol.- No.121
Heavy equipped cavalry are units with heavy equipments not only armor for riding soldiers but also their horses. Generally, Heavy equipped cavalry are considered to be soldiers who use weapons such as spears and swords to charge into enemy formation. In this study, we will look at tactics meaning of heavy equipped cavalry in campaign and battles. The ancient Korean horse is a spices of small horse belonging to the category of the Pony. Therefore it is not suitable to play the bearer of a heavy equipped cavalry who equipped a horse armor. In order to overcome this problem, The Horses, which were brought from the West, would have played the heavy equipped cavalry. However, even These horses from overseas were bigger than the spices of pony, they could not move for a long time because of the weight of armor for them. The survivability of heavy equipped cavalry with a horse armor was not compared to those of other ordinary cavalries. The psychological pressure it impressed on the enemy was also enormous. These are why heavy equipped cavalry prevailed until the Middle Age’s battlefield. But the tactical limitations were also clear. The biggest reason is the weight of the armor on horses. the horse armor provided the horse with strong survivability power, but it is a double-edged sword that prevents the horse from moving at high speed for a long time. The low utilization of heavy equipped cavalry applies not only to the decisive battle but also to campaign situations.
김혜성(Hye-Sung Kim),양성민(Seong-Min Yang),최정열(Jeong-Yeol Choi) 한국추진공학회 2018 한국추진공학회지 Vol.22 No.5
A trajectory analysis program was developed to predict KSLV-II (Korea Space Launch Vehicle-II) performance with the reducing weight. The program estimates the LEO (Low Earth Orbit) / SSO (Sun-Synchronous Orbit) injection performance, which is determined as payload weight for the orbits, with decreasing the structural ratio or increasing rocket engine power. It is expected that the KSLV-II can transport up to 4.5 tons, 3 tons of space payloads at LEO, SSO with a reduced structural ratio by 60% of the original. It also shows that the KSLV-II can transport up to 3.65 tons at SSO by applying advanced engines of 90 tonf, 10 tonf class with the reduced structure.
홍미르(Mir Hong),양성민 (Seong-Min Yang),김혜성(Hye-Sung Kim),윤영빈(Youngbin Yoon),최정열(Jeong-Yeol Choi) 한국추진공학회 2017 한국추진공학회지 Vol.21 No.2
A trajectory analysis program is developed using a 3DOF trajectory model for the performance analysis of geostationary launch vehicles by system options. Launch trajectory and the performance of injection at GTO was estimated using this program for several propellant options, engine types, number of engines and the location of launch site. Results of the analysis presents that the possibility of mission accomplishment by several design options using domestic launch sites and the development direction of GEO launch vehicles.
시스템 구성에 따른 정지궤도 발사체 설계 및 성능 비교
홍미르(Mir Hong),양성민(Seong-Min Yang),김혜성(Hye-Sung Kim),최정열(Jeong-Yeol Choi) 한국추진공학회 2016 한국추진공학회 학술대회논문집 Vol.2016 No.12
정지궤도 발사체의 시스템 옵션별 성능 해석을 위하여 3자유도 궤적모델을 적용한 시뮬레이션 프로그램을 작성하였다. 이 프로그램을 이용하여 추진제의 종류와 엔진방식, 클러스터링 수, 그리고 발사장 위치 등을 옵션으로 두고 발사궤적과 정지천이궤도 투입성능을 계산 및 추정하였다. 나로 우주센터와 90톤급 케로신 엔진, 10톤급 프로페인 엔진을 옵션으로 하였을 때 정지천이궤도에 3.65톤을 투입할 수 있는 것으로 나타났다. A simulation program using a 3DOF trajectory model has been developed for geostationary launch vehicle"s performance analysis by system options. Using this program to calculate and estimate the launching trajectory and injection performance of geostationary transfer orbit with various options such as type of propellant, engine type, number of engines, and location of launch site. In case of Naro Space Center, 3.65 tons of payload could be injected into geostationary transfer orbit by choosing 90-tonf kerosene engine and 10-tonf propane engine options.