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류동완(Dong-Wan Ryu),소은총(Eun-Chong So),강영창(Young-Chang Kang),김선형(Sun-Hyoung Kim) 한국정보기술학회 2016 Proceedings of KIIT Conference Vol.2016 No.6
본 논문의 연구내용은 가시광 통신(VLC, Visible Light Communication)을 이용한 차량 간 통신에 관한 연구이다. 차량 간 송신과 수신을 위한 송신부의 알고리즘 및 하드웨어 구성 블록도와 수신부의 알고리즘 및 수신부의 하드웨어 구성 블록도를 제안하였다. 향후 차량간 가시광통신을 위한 모듈 개발에 유용하게 활용될 것으로 기대된다. Research contents of this paper is the study of the communication between the vehicle using the VLC(Visible Light Communication). Also it proposes a block algorithm, and the hardware configuration of the transmission unit for the transmission and reception between the vehicle . And propose an algorithm and a hardware block diagram of a receiver of the receiver. It is expected to be useful in the development modules for visible light communication between the next vehicle.
2차 폐수처리를 위한 흡착-정밀여과막 복합시스템의 오염 규명
류동완 ( Dong Wan Ryu ),이대행 ( Dae Haeng Lee ),문희 ( Hee Moon ) 조선대학교 공학기술연구원 2010 공학기술논문지 Vol.3 No.4
In spite of many advantages of membranes, the application of membrane process has been limited because of the flux decline resulting mainly form concentration polarization and fouling. Membrane fouling is a long-term decline in the permeate flux from prolonged operating ranging from a few 100 h to several 1,000 h. Fouling phenomena have been characterized by using many parameters such as the silting index, the plugging index, the fouling index and the membrane filtration index. However, the general limitation of these methods is the requirement of long time. Hence, we focused on the minimization of the time required to evaluate the fouling through the modification of fouling index. The pressure and effluent volume variation were precisely obtained for short time, under various operating conditions including powdered activated carbon (PAC) dose, permeate flow rate, pH of the feed solution, feed temperature etc. It was found that addition of PAC significantly lowered the rate of flux decline because of the adsorption of organics dissolved in water. In addition, the larger PAC particles were deposited selectively on the MF surface at faster rates than the finer particles. The boundary layer composed of larger particles has a higher porosity than the upper one of finer particles.
윤석재,류동완,황강석,Yun, Seok-Jae,Ryu, Dong-Wan,Hwang, Kang-Seok 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.4
This paper describes the development of Target Simulator developed for performance test and failure detection of Imaging Infra-Red(IIR) seeker which is one of the most important equipments in specific cruise missile systems. The simulator makes it possible to test detecting and tracking performance for target, uniformity of IIR, FOV status and spatial resolving power. Besides, it includes several self-test functions and optic axis alignment methods to improve its own reliability.
나노 구조 활성탄에 의한 자동차용 천연가스의 흡착 및 저장
박정원 ( Joung Won Park ),류동완 ( Dong Wan Ryu ) 조선대학교 공학기술연구원 2013 공학기술논문지 Vol.6 No.2
Natural gas (NG) has received many attentions as an alternative energy due to its low cost and relatively clean in comparison with conventional fossil fuels. However, NG requires a special storage system owing to its low volumetric energy density. In this work, the methane adsorption is studied on activated carbon monoliths (ACMs) made from anthracite and beer-lees. The adsorption equilibrium isotherms of methane on the ACMs were obtained at three different temperatures of 298, 308 and 318 K and under pressures up to 30 atm using a volumetric adsorption apparatus. The adsorption amounts of methane on the ACMs were experimentally measured and successfully correlated with the Langmuir isotherm model. Especially the anthracite based ACMs have micro pores in the range of about 1.2 ~ 1.4 nm, which has been known to be proper for methane adsorption. In addition, the prepared ACMs have relatively higher packing density than the beer-lees based ACMs previously studied. Thus its methane adsorption capacity is considerably high compared to that of beer-lees based ACMs.
심승우(Seung-Woo Sim),류동완(Dong-Wan Ryu),박찬영(Chan-Young Park) 한국산업융합학회 1999 한국산업융합학회 논문집 Vol.2 No.1
Model predicting the respiration rate of pear under modified LDPE film pouch has been developed. The assumptions of the model have three bases; 1) respiration rate is depending on CO₂ and O₂ concentration in the package, 2) the oxidation of glucose in pear generates carbon dioxides, and 3) gases permeation through the package film bases on the Langmuir adsorption theory and Fick's law. The simulated results agreed fairly well with the experimental data so as this model to be useful in designing the modified atmospheric packaging system.<br/>
심승보(Seung-Bo Sim),류동완 (Dong-Wan Ryu),김선형(Sun-Hyung Kim) 한국정보기술학회 2018 Proceedings of KIIT Conference Vol.2018 No.6
자율 주행 기술 중 차량 간 통신, V2V를 차량용 조명의 빛을 이용한 가시광 통신을 적용하여 구현한다. 주로 사고를 예방하기 위해 사용되는 V2V의 서비스 중 주변 차량 간의 긴급 브레이크 신호 송·수신을 구현하였다. 전방 차량이 브레이크를 밟게 되면 그 차량은 긴급 브레이크 신호를 맨체스터 부호화 및 ASK 변조를 거쳐 후미등 LED에 실어 후방 차량에게 송신한다. 후방 차량은 PD로 그 신호를 받아 증폭, ASK 복조 및 맨체스터 복호화를 하여 신호를 받아들인다. 그리고 그 신호를 스마트폰이나 네비게이션으로 전달하여 운전자에게 확인시키는 시스템을 구현하였다. 본 연구는 향후 자율 주행의 핵심 기술인 V2X 연구에 유용하게 활용될 것으로 기대된다. In this paper, we implement the inter-vehicle communication of autonomous driving technology, V2V by applying visible light communication utilizing the light of vehicle mounted lighting. Among the V2V services used mainly to prevent accidents, we implemented emergency brake signal transmission and reception with surrounding vehicles. When a vehicle ahead steps on the brake, the vehicle transmits an emergency braking signal to the vehicle behind the tail light LED through Manchester coding and ASK modulation process. The rear vehicle receives the signal with the PD, amplifies it, ASK demodulates and Manchester decodes it and accepts the signal. We have implemented a system that transfers the signal to smartphones and navigation and confirms with the driver. In the present study, it is expected that it will be usefully utilized in the V2X research which is the core technology of autonomous driving in the future.
심승보(Seung-Bo Sim),류동완(Dong-Wan Ryu),김선형(Sun-Hyoung Kim) 한국정보기술학회 2017 Proceedings of KIIT Conference Vol.2017 No.6
본 논문은 스마트 터널등을 이용한 재난감지 시스템 개발에 관한 연구로서 MCU 모듈, PLC(Power Line Communication, 전력선 통신)모듈, 차량 충돌감지 센서 그리고 화재 감지 센서가 내장된 스마트 터널등을 이용해서 하나의 전력선으로 연결되어 있는 터널 등들에 대한 조도제어 및 재난감지 시스템을 전력선 통신을 기반으로 하여 제안한 것이다. 터널에서 발생할 수 있는 재난 상황을 감지하여 2차 사고를 방지하기 위한 시스템과 부가적으로 터널등의 조도를 조절해서 에너지를 절약할 수 있는 디밍(Dimming) 시스템을 결합하여 조도제어 및 재난감지 시스템을 설계하고 이의 알고리즘 및 하드웨어를 개발하여 시스템을 구현하고자 하였다. 본 연구는 향후 재난 감지시스템을 갖춘 터널에 적용할 스마트 터널등 개발에 유용하게 활용될 것으로 기대된다. This paper deals with the development of disaster detection system using smart tunnel light, it proposes lighting control and disaster detection system for smart tunnel lights connected to one power line based on power line communication by using the smart tunnel light with MCU module, PLC(Power Line Communication) module, vehicle collision detection sensor and fire detection sensor. We designed the lighting control and disaster detection system by combining the system to prevent the secondary accident by detecting the disaster situation that may occur in the tunnel and the dimming system which can save the energy by adjusting the illumination of the tunnel light, wanted to implement this algorithm and hardware by developing. This research is expected to be useful for the development of smart tunnel light to be applied to tunnels equipped with disaster detection systems in the future.