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도시하수 처리 혐기성 유동상 반응조의 후속공정으로서 화학응집의 가능성 평가
양승용,배재호 대한상하수도학회 2014 상하수도학회지 Vol.28 No.6
This study examined a feasibility of coagulation as post-treatment to remove sulfide and phosphorus for the effluent of anaerobic fluidized bed reactor (AFBR) treating domestic wastewater. Removal efficiencies of sulfide, phosphorus and COD by coagulation were not affected by pH in the range of 5.9 to 7.2. Alkalinity requirement could be estimated by the amount of Fe3+ to form Fe(OH)3(S) and to remove sulfide and phosphorus. At coagulant aid dosage of 2 mg/L, anionic polymer showed best results regarding size and settleability of flocs. Sulfide removal for the AFBR effluent at the Fe3+/S2- ratio of 0.64, close to the theoretical value of 0.67 found with a synthetic wastewater, was only 75.2%. One of the reasons for this low sulfide removal is that the AFBR effluent contains, phosphorus, hydroxide and bicarbonate which can react with Fe3+ competitively. Concentrations of sulfide and phosphorous reduced to below 0.1 and 0.5 mg/L, respectively, at the Fe3+/S2- ratio of 2.0. Average effluent COD of 80 mg/L, mostly soluble COD, was obtained at the dosage 50 mg Fe3+/L (Fe3+/S2- ratio of 2.0) with corresponding COD removal of 55%. For better removal of COD, soluble COD removal at the AFBR should be enhanced. Coagulation with Fe3+ removed sulfide, phosphorus and COD simultaneously in the AFBR effluent, and thus could be an alternative process for the conventional wastewater treatment processes where relatively high quality effluent is not required.
양승용,유완,김형진 대한교통학회 2004 대한교통학회 학술대회지 Vol.46 No.-
교통문제로부터 기인하는 사회적 비용이 높아가고 있는 현실에서 새로운 정책수립 및 계획을 위해서는 교통현상을 규명할 수 있는 정확한 기초통계자료의 확보가 필요하다. 그러나 현재의 교통관련 기초통계자료의 현황을 보면 자료의 부족 및 분산관리, 자료의 DB 구축 미비 및 정보 부족, 비효율적인 자료전달 및 활용체계로 인해 효율적인 자료의 이용이 거의 불가능한 실정이다. 기초자료로 활용되는 자료부문으로 도시성장지표가 있으며, 여러 도시성장지표 중에서 교통수요분석에 주로 이용되는 자료에는 인구, 세대수, 산업별 종사자수, 지역내 총생산이 있다. 다른 자료의 경우 교통수요분석에 이용하는데 큰 어려움은 없는 편이나 지역내총생산-GRDP(Gross Regional Domestic Product)는 대존(특별시/광역시/도)별로만 그 값이 집계될 뿐, 4개 광역자치단체(대전, 경기, 강원, 경북)를 제외하면 시/군/구 단위에서는 그 값이 발표되지 않는 실정이어서 자료의 이용이 거의 불가능하다.
지속적인 골프 시장 활성화 방안 : 일본의 골프 시장 사례 연구 중심으로
양승용,변광인 한국관광정보학회 2003 觀光情報硏究 Vol.- No.13
Due to the sudden increase of golf population, golf clubs and the inside and outside golf tourist. Golf is no more position of a special class than a general public sports. Nevertheless Korean recognition about golf is negative. So in this article I would like to discuss plans that correct this negative recognition and activate golf. First, The Bisection of Korean golf, membership & public. Second, The improvement of golf membership. Third, The improvement of golf establishment, the supply of cheap equipment. Fourth, The institute of like America NGF building. Fifth, The change of negative recognition. Sixth, The upbringing of a expert leader. The supply of programs. Seventh. The Development of a new category business & goods on golf club. If this plans were realized. Korean golf would be activated.
양승용,부창진,유경상,김대진,김호찬 제어·로봇·시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.1
This paper describes an electric vehicle (EV) model using Matlab/Simulink software and compares the modeled performance with test data from an EV developed for actual use. To develop a 28 kW EV using an induction motor, a gearbox with a 1 : 5.5 ratio is used in the powertrain. We utilized an 11.1 kWh battery pack that includes a battery management system (BMS) using 20 x 2 lithium-polymer battery cells. Accurate estimation of battery SOC is one of the key problems in a BMS. In order to improve the battery state of charge (SOC) estimation, this paper proposes a battery SOC estimation method using an extended Kalman filter for lithium-polymer batteries. Numerical simulation and hardware test results indicate that the proposed algorithm is very useful with respect to improving the accuracy of battery SOC estimation.