http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
손세창(Se Chang Son),조환규(Hwan Gue Cho),좌경룡(Kyung-Yong Chwa) 한국정보과학회 1989 한국정보과학회 학술발표논문집 Vol.16 No.1
본 논문에서는 정점(vertex)사이에 배열 순서가 정해진 이분 그래프(bipartite graph)에 대해서 에지(edge)가 서로 교차하지 않는 maximum matching(MPM), 에지가 서로 교차하지 않는 maximum spanning tree(MPST), 에지가 서로 교차하지 않는 longest path(LgPP)를 찾는 효율적인 알고리즘을 제시한다.
기술자료 : 초미세먼지의 지각원소 지시자로서 희토류 원소의 사용 가능성 조사
유근혜 ( Geun Hye Yu ),손세창 ( Se Chang Son ),조성용 ( Sung Yong Cho ),박승식 ( Seung Shik Park ) 한국환경분석학회 2015 환경분석과 독성보건 Vol.18 No.1
In this study 24-hr integrated PM2.5 samples were collected between November 5, 2013 and June 30, 2014, at an urban site in Gwangju, Korea, and analyzed for elemental constituents using energy disperse X-ray fluorescence to evaluate possibility of utilizing rare earth elements (REEs) of European (Eu) and Terbium (Tb) as soil dust markers. Over the study period, concentration of Al, i.e., a representative element of soil dusts, was strongly correlated with those of Si (r=0.98), Ca (r=0.97), Ti (r=0.97), Fe (r=0.96), Eu (r=0.76), and Tb (r= 0.90), suggesting their influence from the soil dusts. Over the study period, four dust-storm episodes (Jan. 1, May 26, May 28, and May 29, 2014) occurred, during which crustal material concentration was 9.6, 18.7, 19.7, and 12.3 μg/m3, respectively, which accounts for 23.0, 49.4, 22.6, and 26.7% of the measured PM2.5 concentration. The Eu and Tb concentrations were on average 24.2 and 12.5 ng/m3, respectively, reaching maximum values (89.7 and 73.1 ng/m3) on May 28 when Asian dust storm was observed at the site. Multiple linear regression analysis indicates that crustal material concentration estimated based on Eu and Tb is strongly correlated with that estimated based on concentrations of the typical crustal elements; [Crustal material]estimated = (194.2±15.7)Tb(μg/m3) + (26.1±10.9)Eu(μg/m3) + (-0.53±0.19), r=0.91, p<0.001]. Also results from principal component analysis demonstrate that the elements Eu and Tb were strongly associated with natural elements (Al, Si, Ca, Ti, and Fe), suggesting that crustal dusts could be one of major sources of the Eu and Tb. Finally, results from this study suggest that the Eu and Tb could also be good candidates of soil dust tracers.