http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
정영석(Young-Suk Jung),오승협(Seung-Hyub Oh),박정주(Jeong-Joo Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
The propulsion system of a launch vehicle can be classified with subsystems as propellant tank, pressurization system, propellant fill/drain system, valve operating system, purge system and so on. Among others, Pressurization system is the most important subsystem, because of the only active control part. On conceptual design process, it is the first considerable system. In this paper, the materials of the previously developed pressurization systems were surveyed and the optimumconfiguration was selected with the analysis of advantages and disadvantages of each system and the weight of each system.
DC Motor와 Ballscrew를 이용한 Electromagnetic Damper Damping 효과 실험
강정호(Jeong-Ho Kang),이학철(Hac-Choel Lee),정영석(Young-Suk Jeong) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
In this Paper, the modeling of the electromagnetic damper for automobile suspension is presented and the validation of the model is demonstrated by experiments. An electromagnetic damper, composed of a rotary DC motor, and a ball screw and nut. The damper then operates as a linear electric actuator. The damper then operate as a linear electric actuator. The results indicate the proposed system is feasible and it is proved that the electromagnetic damper has better than oil damper of passive control system.
CSV형식 공공 개방데이터의 도메인 판별 모델에 관한 연구
정하나(Ha-Na Jeong),김재웅(Jae-Woong Kim),정영석(Young-Suk Chung) 한국컴퓨터정보학회 2023 韓國컴퓨터情報學會論文誌 Vol.28 No.12
정부는 공공데이터 품질관리 수준평가를 진행하여 공공 개방데이터의 품질관리를 진행하고 있다. 공공 개방데이터는 XML, JSON, CSV 등 여러 오픈포맷 형태로 제공되며 CSV 형식이 대다수를 차지한다. 이러한 CSV 형식의 공공 개방데이터 품질진단 시 품질진단 담당자가 공공 개방데이터 파일의 필드명과 필드 내 데이터에 의존하여 필드 별 도메인을 판단하여 진단한다. 그러나 대량의 개방 데이터 파일을 대상으로 품질진단을 수행하기 때문에 많은 시간이 소요된다. 또한 의미 파악이 어려운 필드의 경우 품질진단의 정확성이 품질진단 담당자의 데이터 이해도 역량의 영향을 받는다. 본 논문은 필드명과 데이터 분포 통계를 이용한 CSV 형식 공공 개방데이터의 도메인 판별 모델을 제안하여 품질진단 결과가 품질진단 담당자의 역량에 좌지우지 되지 않도록 일관성과 정확성을 보장하고 진단 소요 시간 단축을 지원한다. 본 논문의 모델 적용 결과 행정안전부에서 제공하는 파일형식 개방데이터 진단도구보다 2.8% 높은 약 77%의 정답률을 보였다. 이를 통해 공공데이터 품질관리 수준진단·평가에 제안 모델 적용 시 정확성을 향상시킬 수 있을 것으로 기대한다. The government of the Republic of Korea is conducting quality management of public open data by conducting a public data quality management level evaluation. Public open data is provided in various open formats such as XML, JSON, and CSV, with CSV format accounting for the majority. When diagnosing the quality of public open data in CSV format, the quality diagnosis manager determines and diagnoses the domain for each field based on the field name and data within the field of the public open data file. However, it takes a lot of time because quality diagnosis is performed on large amounts of open data files. Additionally, in the case of fields whose meaning is difficult to understand, the accuracy of quality diagnosis is affected by the quality diagnosis persons ability to understand the data. This paper proposes a domain discrimination model for public open data in CSV format using field names and data distribution statistics to ensure consistency and accuracy so that quality diagnosis results are not influenced by the capabilities of the quality diagnosis person in charge, and to support shortening of diagnosis time. As a result of applying the model in this paper, the correct answer rate was about 77%, which is 2.8% higher than the file format open data diagnostic tool provided by the Ministry of Public Administration and Security. Through this, we expect to be able to improve accuracy when applying the proposed model to diagnosing and evaluating the quality management level of public data.
다공성 패드를 갖는 챔버의 배열에 따른 공기 부상 테이블의 비접촉 부상 수준에 대한 연구
김준현(Joon Hyun Kim),정영석(Young Suk Jeong),이태걸(Tae Geol Lee),김태훈(Tae Hoon Kim),정효재(Hyo Jae Jung) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.6
This paper presents an applicable basic design that can configure non-contact levitation table for conveying a large sheet of glass. The suggested air levitation table consists of a series of air chambers with porous pads and fans as the conveyor system. The air supply chambers are arrayed to supply an adequately strong upward airflow for supporting the glass. Levitation is controlled by the size and discharge velocity, of the chamber arrays, as well as the glass supporting height. After pre-evaluation of the glass rigidity and the filer functional performance, a one-way fluid structure interface (FSI) analysis is performed for predicting pressure and deflection working of the 8G glass in the transverse and longitudinal directions, respectively. After comparing calculated levels of flatness of the glass, it determines the chamber array for the linear non-contact conveying motion.
조성우(Cho Sung-Woo),이수용(Lee Su-Young),정영석(Jeong Young-Suk),오세규(Oh Se-Gyu) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.7
Underground parking lots take up large portion of area within shared housing compound, affecting other facilities significantly and closely involving with the satisfaction of space utilization within the compound, but nevertheless, since the lots are not permanently residing space, they tend to be neglected compared wit other space. Also, as they are situated in relatively poor environmental conditions compared with above ground space, underground parking lots are liable to be subject to physical, psychological problems like long distance from main building, vehicle damage, fear of crime, turbid air, darkness and sense of isolation etc. Therefore, this study's objective is to propose the directions of improvement and plan for underground environment within shared housing compounds constructed later on through survey of underground parking lots usage status and residents consciousness on residents of apartment complexes that are introducing underground parking lots as shared housing compounds that are located in the metro city of Gwangju and completed construction since 2000s.
DC Motor를 이용한 능동형 댐퍼 시스템에 대한 연구
이학철(Hak-Choel Lee),전진용(Jin-Young Jeon),정영석(Young-Suk Jeong) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
The suspension systems currently in use can be classified as passive, semi-active and active. The passive suspension systems are the most commonly used due their low price and high reliability. However, this system cannot assure the desired performance form a modern suspension system. An important improvement of suspension performance is achieved by the active systems. This paper treats active damper system and applying DC-Motor. In this system, all the energy for active control is supplied from the damper, which regenerates energy. And simulations by sky-hook control.