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이춘경(Chun-Gyeong Lee),송성근(Sung-Keun Song),강병길(Byung-Kil Kang),윤희용(Hee-Yong Youn) 한국컴퓨터정보학회 2010 한국컴퓨터정보학회 학술발표논문집 Vol.18 No.2
현재 사용되는 차량 검지기는 크게 두 가지 검지기가 사용되고 있다. 그 종류는 루프 검지기와 영상 검지기인데 지금 이러한 두 가지 유형은 설치 이용되고 있고, 이러한 검지기로부터 수집된 교통량, 속도 등의 실시간 교통 자료는 가공과정을 거친 후 반복/비 반복 정체관리, 돌발 상황관리, 경로안내 서비스 등 다양한 서비스에 활용하고 있으나, 이들 용도 이외에 더욱더 다양한 서비스를 지원하는 작업이 필요하며 예를 들면, 교통정책 평가, 교통사업 평가, 교통안전 증진 등의 다양한 목적으로 활용하는 서비스를 지원하는 것이어야 하겠다. 따라서 현재 이용되는 차량 검지기 시스템의 확대 설치가 이루어져야 한다. 그러나 루프 검지기와 영상 검지기는 복잡한 공사를 수반하며, 가격 또한 높고 USN 기반의 인식 기술에 비해 경제성과 경쟁력이 떨어진다. 따라서 다양한 공공/민간 교통서비스 및 u-City의 응용 서비스 기술에 필요한 USN 기반의 차량 식별/인식/속도 검지 기술의 개발이 필요하다.
이종진 ( Lee Jong Jin ),김진수 ( Kim Jin Soo ),오승영 ( Oh Sung Young ),이철원 ( Lee Chul Won ),윤춘경 ( Yoon Chun Gyeong ) 한국농공학회 2000 한국농공학회 학술대회초록집 Vol.2000 No.-
The effect of slow release fertilizer application on ponded and percolation water in paddies were evaluated at the experimental plots during irrigation period. We laid out three experimental plots such as standard, 100% slow-release and 80% slow-release. For ponded water, the concentrations of T-N in slow-release plots slowly increase after fertilizing and decrease slowly. The concentration of COD in percolated water was independent of the type of plots. Amount of nitrogen uptake of rice plant in a standard plot was highest at the middle or end of July and was higher than the other plots.
토지이용과 오염원자료의 Zone별 분포와 수질간의 관계 분석
이승재 ( Lee Seung-jae ),윤춘경 ( Yoon Chun-gyeong ),정광욱 ( Jung Kwang-wook ),이상우 ( Lee Sang-woo ),장재호 ( Jang Jae-ho ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
Despite numerous studies investigating the relationships between water quality and land use, there are increasing concerns about the geographical variation and lack of spatial integration in previous studies. We investigated the relationships between land use and water quality characteristics in the Hwa-Sung estuarine reservoir watershed in Korea, which has spatially integrated land uses. The spatial variations of these relationships were also examined using zonal analysis. Water quality parameter were positively correlated with residential and forest, negatively with paddy and upland especially during base flow in the near buffer zone. Population and livestock density was correlated well to water quality parameter than just number of population and livestock. Relationships across zones, distinguished by distances from streams, were inconsistent and erratic, suggesting that the relationships between remote land uses and water quality may be affected more significantly by sub-basin characteristics than by the land use itself. This methodology could be applied to other areas where the watershed characteristics are not significantly different from the study area.
이승재 ( Lee Seung Jae ),윤춘경 ( Yoon Chun Gyeong ),장재호 ( Jang Jae Ho ),신아현 ( Shin Ah Hyun ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
The rain nonpoint source is flowing toward the rivers at storm event with the point source is controlled from the most wastewater treatment area is having the quality which directness flows differently in the rivers. The impervious area ratio to be high established with the grass swale in road side where the storm event surface outflow is many. At fertilizer application and irrigation nonpoint source unit effect the rice field which goes mad. it created the wetland in the area where it does in very close drainage ditch reverse. With the grass swale in the objective which will remove the nonpoint source material of the storm event road inside it is established in the site between Yong-in si Gyung-an stream and 45 national roads, the control objective area the most corresponds to the road with 0.77 ha. The influx bringing up for discussion raceway it leads with the grass swale and the rainfall outflow possibility of flowing with the grass swale and inside Gyung-an stream to lead it filtrates, the precipitation and permeation back to be controlled it is discharged. The wetland was establishment in Yong-in si Po-gok myon Sam-gae li Gyung-an stream riverside and water distribution area is 10.38 ha. Grass swale and wetland diposal efficiency was calculated EMCs (Event Mean Concentrations)
정광욱,윤춘경,이인호,이승일,강수만,함종화,Jung, Kwang Wook,Yoon, Chun Gyeong,Lee, In Ho,Lee, Seung Il,Kang, Su Man,Ham, Jong Hwa 한국농공학회 2014 한국농공학회논문집 Vol.56 No.1
Sediment pollutants have been considered an important source for the eutrophication of estuarine reservoir. In this study, the effects of pollutants released from bottom sediment to water column were investigated. Sediment samples were collected each two station from Namyang and Sukmoon estuarine reservoirs in August 2013. The fractionation result of sediment phosphorus indicated that Adsorbed-P ($36.7{\pm}8.84%$) and Nonapatite-P ($29.3{\pm}12.50%$) are the two dominant phosphorus groups in the sediments. For sediment release test, eight sets of acrylic chamber (0.3 m $diameter{\times}1m$ high, with 0.15 m sediment depth) were used with aerobic and anaerobic environment. Under anaerobic conditions, rates of $NH_4-N$ release from the sediments were highly variable, with final concentrations of $NH_4-N$ in the overlying water varying from between about 0.69~1.04 in Namyang and 2.58~4.23 mg/L in Sukmoon reservoir. The $NH_4-N$ release was active at the upstream around the confluence of tributary compared to downstream near the embankment. The $PO_4-P$ release was more obvious than $NH_4-N$ in anaerobic condition. The final $PO_4-P$ concentrations were approximately from two-fold to eight-fold higher than initial concentration. In terms of reservoir water quality management, not only tributary pollutants but also sediment nutrient loading is necessary to consider the water quality contribution.
이새봄 ( Lee Sae Bom ),윤춘경 ( Yoon Chun Gyeong ),정광욱 ( Jung Kwang-wook ),장재호 ( Jang Jae-ho ),한정윤 ( Han Jung-yoon ) 한국농공학회 2006 한국농공학회 학술대회초록집 Vol.2006 No.-
Monitoring data of 48 agricultural reservoirs from 1999 to 2004 was analyzed for water quality characteristics including biochemical oxygen demand (BOD5), chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP), and chl-a. Land uses of the watersheds associated with these reservoirs were determined for residential, forest, upland, paddy and miscellaneous, and regressed against water quality characteristics. Regression analyses showed that forest land use was negatively correlated with all the water quality characteristics implying it's beneficial effects in water quality perspectives. Other land uses including residential, upland, and paddy generally illustrated positive correlation with water quality characteristics, which indicates most human activities of the watershed could degrade water quality of the receiving water bodies. Paddy land use partially contributed to the water quality degradation in contrast to the previous studies. It might be attributed to the relatively clean water quality of the study area, where even slight pollutant loading could degrade sensitively water quality. Further investigation is recommended for the effect of proximity as well as land use portions on the water quality of receiving water body.
사질토 간극수의 이온 성분들에 따른 전기비저항값의 변화
유찬,윤춘경,이영남,이용길,Yu, Chan,Yoon, Chun-Gyeong,Lee, Young-Nam,Lee, Yong-Gil 한국지반공학회 1999 한국지반공학회논문집 Vol.15 No.1
실내실험에 의하여 사질토 간극수의 이온 성분들사이 관계를 규명하기 위하여 흙의 비저항측정 상자와 STING-Rl비저항 측정기를 이용하여 분석을 수행하였다. 실험은 이온성분들의 농도를 변화시키면서 실시하였다. 또한 2~3가지 성분을 혼합한 경우에 대해서도 비저항값의 변화를 측정하였다. 실험결과는 성분중에서 비소(As)의 비저항값의 감소가 가장 컸으며, 나머지 성분들은 일반성분들과 큰 차이를 보이지는 않았다. 또한 혼합성분의 경우에는 비저항값의 범위가 간극수에 포함된 성분들의 비저항값에 따라 달라지는 것으로 나타났다. A laboratory experiment was performed to examine the relationship between resistivity and ionic components in the pore water of a sand by using soil resistivity test box and STING-Rl. The resistivity measurement was performed with the concentration changes of ionic components. Also, the resistivity change was evaluated for multiple components. The results showed that the resistivity of Arsenic was less than other heavy metals. In the case of complex components, resistivity ranges depended on the resistivity of components existed in the pore water.
인공습지 내 거리에 따른 ORP, pH, DO 변화와 수질 관계 분석
이한필 ( Lee Han Pil ),윤춘경 ( Yoon Chun Gyeong ),김형철 ( Kim Hyung Chul ),이승재 ( Lee Seung Jae ),엄한용 ( Um Han Yong ) 한국농공학회 2007 한국농공학회 학술대회초록집 Vol.2007 No.-
Oxidation-Reduction potential, Dissolved Oxygen and pH have an effect on life and activity of microorganism. So, those have relationship with nitrification and denitrification. This study analyze variation of ORP, pH and DO concentration with distance from inflow in free water surface constructed wetland, and have an intent to make a investigation into self-purification of nutrient with that each parameters are related to ammonia, nitrite and nitrate.