http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
제주도 서반부의 대수층 체계와 지진에 의한 지하수위 변동 특성
옥순일,함세영,김봉상,정재열,우남칠,이수형,고기원,박윤석,Ok, Soon-Il,Hamm, Se-Yeong,Kim, Bong-Sang,Cheong, Jae-Yeol,Woo, Nam-Chil,Lee, Soo-Hyoung,Koh, Gi-Won,Park, Yun-Seok 대한자원환경지질학회 2010 자원환경지질 Vol.43 No.4
본 연구는 서반부지역(북서부 소지역, 서부 소지역, 남서부 소지역)에 광역상수도용 수원지 개발을 위하여 굴착된 지하수공을 중심으로 대수층 체계를 분류하고, 수리지질 특성을 규명하였다. 북서부 소지역의 대수층 체계는 상부 투수층-상부 저투수층-하부 투수층-하부 저투수층으로 구성되고, 서부 소지역과 남서부 소지역의 대수층 체계는 상부 저투수층-투수층-하부 저투수층으로 구성된다. 투수량계수와 비양수량은 북서부 소지역, 서부 소지역, 남서부 소지역의 순으로 낮아진다. 비양수량과 응회암의 산출 고도는 비교적 높은 반비례 관계(상관계수 -0.848)를 보이며, 이는 응회암이 대수층의 밑바닥 역할을 하기 때문으로 판단된다. 3개 소지역에 대해서 2004년 수마트라 지진에 의한 지하수위 변동 분석결과, 북서부 소지역에서 평균 23.74 cm로 가장 크며, 서부 소지역에서는 평균 9.48 cm이고, 남서부 소지역 에서는 지하수위 변동이 나타나지 않았다. 그리고 지진에 의한 지하수위 변화는 투수량계수 및 비양수량과 정비례관계를 가지는 것으로 나타났다. This study characterizes aquifer system and hydrogeologic property in the western half of Jeju Island where wells were drilled for regional water supply in three sub-areas (northwestern, western, and southwestern sub-areas). The aquifer system of the northwestern sub-area is largely composed of upper high-permeability layer, upper low-permeability layer, lower high-permeability layer, and lower low-permeability layer. On the other hand, the aquifer systems of the western and southwestern sub-areas are mostly composed of upper low-permeability layer, high-permeability layer, and lower low-permeability layer. Transmissivity and specific capacity decrease in the order of the northwestern, western, and southwestern sub-areas. The relationship between specific capacity and the top surface of tuff is negative with a high correlation coefficient of -0.848, indicating that the tuff acts as the bottom of the aquifer. Groundwater level change due to the 2004 Sumatra earthquake is an average of 23.74 cm in the northwestern sub-area, an average of 9.48 cm in the western sub-area, and none in the southwestern sub-area. Further, it is found that groundwater change due to the earthquake has a positive relationship with transmissivity and specific capacity.
농작업 부하 데이터를 활용한 80 kW급 전기구동 AWD 트랙터의 시뮬레이션 모델 개발
백승윤(Seung Yun Baek),김완수(Wan Soo Kim),김연수(Yeon Soo Kim),김용주(Yong Joo Kim),박철규(Cheol Gyu Park),안수철(Su Cheol An),문희창(Hee Chang Moon),김봉상(Bong Sang Kim) 유공압건설기계학회 2020 드라이브·컨트롤 Vol.17 No.1
The aim of this study is to design a simulation model for an electric All-Wheel-Drive (AWD) tractor to evaluate the performance of the selected component and agricultural work ability. The electric AWD tractor consists of four motors independently for each drive wheel, and each motor is combined with an engine generator, a battery pack, and reducers. The torque data of a 78 kW-class tractor was measured during plow tillage and driving operation to develop a workload cycle. A simulation model was developed by using commercial software, Simulation X, and it used the workload as the simulation condition. As a result of simulation analysis, the drive system, including an electric motor and reducers, was able to cope with high load during plow tillage. The SOC (State of Charge) level was influenced by the output power of the motor, and it was maintained in the range of 50~80%. The fuel consumed by the engine was about 18.23 L during working on a total of 8 fields. The electric AWD tractor was able to perform agricultural work for about 7 hours. In the future study, the electric AWD tractor will be developed reflecting the simulation condition. Research on the comparison between the simulation model and the electric AWD tractor should be performed.
한환수(Han Hwan-Su),전승기(Jeon Seung-Gie),박태영(Park Tae-Young),김봉상(Kim Bong-Sang),박덕신(Park Duck-Shin),권순박(Kwon Soon-Bark) 한국철도학회 2007 한국철도학회 학술발표대회논문집 Vol.- No.-
An amenity requirement of the passenger using public traffic is rising continuously, and also The Ministry of Environment established "Indoor air quality management guidelines in public facilities(Dec. 2006)". To satisfy such requirement, the photoplasma device to decrease VOCs(Volatile Organic Compounds) and suspended bacillus is applied to the underframe mounted HVAC(Heating, Ventilating and Air-Conditioning) system for train. Air purifying method of photoplasma device is optical and chemical reaction that UV-light(wavelength less than 280nm) react with catalyst material(TiO2). To analyze the efficiency of photoplasma in this study, we measured the requirement time for toluene to decease down to 0.3ppm after contaminating the passenger cabin for train to toluene 1ppm.