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RISS 인기검색어
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- 저자 : 채정민(Jeong Min Chae) (검색결과 25 건)
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채정민 ( Jeong Min Chae ),정영희 ( Young Hee Jung ),이태민 ( Tae Min Lee ),채지은 ( Ji Eun Chae ),오흥범 ( Heung Bum Oh ),정순영 ( Soon Young Jung ) 한국컴퓨터교육학회 2011 컴퓨터교육학회 논문지 Vol.14 No.2
생의학분야에서 문헌에 표기된 개체를 인식하기 위해 길이우선매칭기법을 빈번히 사용한다. 길이우선매칭기법은 사전을 이용한 개체인식기법으로 좋은 사전만 구축되어 있다면 빠르고 정확하게 개체를 찾아낼 수 있다는 장점을 가진다. 그러나 개체가 나열되고 중복된 단어가 생략될 경우에는 길이우선매칭기법을 이용할 경우 성능이 현저히 떨어지게 된다. 우리는 이러한 인식성능문제를 해결하기 위해 부분매칭기법을 제안한다. 제안된 부분매칭기법은 생략이 발생될 수 있다는 것을 가정하여 다수의 후보개체를 만들어 내고 그 후에 최적화 알고리즘을 통해 다수의 개체후보 중에서 가장 타당해 보이는 개체를 선택한다. 우리는 생의학분야의 개체 중에서 나열되는 경우가 빈번한 HLA 유전자, HLA 항원, HLA 대립유전자 개체들을 대상으로 길이우선매칭기법과 제안된 부분매칭기법의 개체인식성능을 분석하였다. 3종의 HLA 개체들을 인식하기 위해서 먼저 확장사전과 태그기반사전을 구축하였으며, 그 후 구축된 사전을 이용해 길이우선매칭과 부분매칭을 수행하였다. 실험결과에 따르면 길이우선매칭기법은 HLA 항원 개체에서 좋은 성능을 보였으며 부분매칭기법은 생략된 표현이 빈번한 HLA 유전자 개체, HLA 대립유전자 개체에서 좋은 성능을 보였다. 부분매칭기법은 HLA 대립유전자 개체를 대상으로 95.59%의 높은 F-score를 얻었다. In the biomedical domain, the longest matching method is frequently used for recognizing named entity written in the literature. This method uses a dictionary as a resource for named entity recognition. If there exist appropriated dictionary about target domain, the longest matching method has the advantage of being able to recognize the entities of target domain quickly and exactly. However, the longest matching method is difficult to recognize the enumerated named entities, because these entities are frequently expressed as being omitted some words. In order to resolve this problem, we propose the partial matching method using a dictionary. The proposed method makes several candidate entities on the assumption that the ellipses may be included. After that, the method selects the most valid one among candidate entities through the optimization algorithm. We tested the longest and partial matching method about HLA entities: HLA gene, antigen, and allele entities, which are frequently enumerated among biomedical entities. As preparing for named entity recognition, we built two new resource, extended dictionary and tag-based dictionary about HLA entities. And later, we performed the longest and partial matching method using each dictionary. According to our experiment result, the longest matching method was effective in recognizing HLA antigen entities, in which the ellipses are rare, and the partial matching method was effective in recognizing HLA gene and allele entities, in which the ellipses are frequent. Especially, the partial matching method had a high F-score 95.59% about HLA alleles.
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정민채(Min-Chae Jung),윤상길(Sang Gil Yoon),윤동진(Dong Jin Yoon),서정세(Jeong-Se Suh) 한국기계가공학회 2020 한국기계가공학회지 Vol.19 No.4
In this study, the temperature distribution and heat transfer characteristics of each component in a solenoid motor system were numerically investigated when heat is generated by the steel pad attached to the solenoid ring of the motor. It was found that the internal airflow was complicated by the inflow velocity of air and the rotation of guide rollers and solenoid rings. Based on the numerical results, the tendency for temperature changes in the steel panel was lower due to the contact of the cooling air in the front in the rotational direction, and the peak temperature was at the front of the center. In particular, it was confirmed that as the air inflow rate was increased, the temperature was reduced due to strong convection. The temperature of the iron plate pad was decreased as the convective heat transfer coefficient was linearly increased with increasing airflow around the solenoid ring. In addition, the temperature of the iron plate panel was rapidly increased with increasing heat generation.
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김상민(Sang-Min Kim),한정옥(Jeong-Ok Han),이영철(Yeong-Cheol Lee),이중성(Joong-Seong Lee),김용철(Yong-Cheol Kim),채정민(Jeong-Min Chae),홍성호(Seong-Ho Hong) 한국가스학회 2013 한국가스학회지 Vol.17 No.5
수소와 압축천연가스가 30 : 70비율로 혼합되는 HCNG 공급 시스템의 공정모사를 수행하였다. 수소 생산은 천연가스로부터 수증기 개질 공정을 이용하는 방법이며, 수증기 개질반응기 운전조건으로 SCR은 증가할수록 천연가스의 전환율은 증가하지만 SCR이 3이상부터는 큰 차이가 없었고, GHSV는 증가할수록 연료처리량이 증가하지만 전환율은 감소하여 1700 h-1일 때 전환율 및 연료처리량이 최적상태가 되었다. CNG는 저압 천연가스가로부터 압축되어 공급되는 시스템이다. 혼합용 수소와 천연가스는 고압상태에서 HCNG로 혼합된다. 수소와 천연가스는 각각 400 bar와 250 bar의 고압으로 압축된다. 고압압축을 위해 단일압축보다 압축소요동력이 적게 사용되는 다단 압축을 사용하였다. 수소와 천연가스압축에 각각 사용된 압축기들의 압축 총 소요 동력을 최소화하는 중간 설정압력으로 각각 61 bar, 65 bar의 중간압력을 도출하였다. In this study, simulation work of HCNG refueling system was performed. The hydrogen was produced from steam reforming process by natural gas. The conversion of natural gas is increased as SCR is increased. but it was no significant difference more than 3 of SCR and fuel throughput is increased as GHSV is increased. Both conversion and fuel throughput levels was optimized when the 1700h<SUP>-1</SUP> of GHSV. CNG was compressed from low pressure natural gas. For the mixing of H₂ and CNG is mixed with the high pressure conditions such as 400bar of H₂ and 250bar of natural gas. Single-stage compression was required more power than multi stage. So, multi stage compression was suggested for high pressure compression. We calculated the intermediate pressure to minimize total required power of compressors. The intermediate pressure for H₂ and natural gas were derived at 61 and 65 bar, respectively.
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김상민(Sang-Min Kim),이중성(Joong-Seong Lee),한정옥(Jeong-Ok Han),이영철(Yeong-Cheol Lee),김용철(Yong-Cheol Kim),채정민(Jeong-Min Chae),홍성호(Seong-Ho Hong) 한국가스학회 2014 한국가스학회지 Vol.18 No.1
수소와 압축천연가스의 혼합연료 HCNG의 가스공급 및 충전을 위해 혼합장치 제작 및 충전실험을 수행하였다. 비율제어방식 개념으로 수소와 압축천연가스는 30 : 70의 비율로 혼합된다. HCNG 충전방법으로는 탱크의 압력을 이용하여 충전할 수 있는 FULL충전, 일정량을 충전할 수 있는 정량충전 방식이 있다. Full충전과 정량충전결과 모두 혼합비율 30 : 70에 오차 제한범위인 수소30±2% 조건을 만족시켰다. 탱크에 충전된 HCNG의 조성을 Gas Chromatography로 분석한 결과도 오차제한범위를 만족시켜 충전탱크에서도 30 : 70의 비율을 확인하였다. Mixture of hydrogen and natural gas HCNG mixing equipment production and refueling experiment were performed for supply and product. Hydrogen and CNG in 30 : 70 ratio is mixing of HCNG was performed using ratio control. HCNG refueling method was calculated after reading the pressure of tank for full refuel, amount refuel. Both full refuel and amount refuel results mixed ratio 30 : 70 in the error limits of H₂±2% met the criterion. HCNG composition analysis result in refueling tank using gas chromatography is satisfying the error limits in refuel tank 30 : 70 ratio were confirmed.
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이태희(Tae Hee Lee),정민채(Min Chae Jeong) 한국관광연구학회 2005 관광연구저널 Vol.19 No.3
This study intended to produce brand index evaluation for tourism destination. Six factors such as awareness, preference, value for visit, uniqueness, popularity, and price premium were identified for measuring and evaluating brand index of tourism destination. Based on the these factors, 11 domestic destinations were evaluated and compared in terms of brand index criteria. Value for visit was found to be the most important factor for brand index of tourist destinations. According to this evaluation, we can guess positioning establishment as well as ranking change of tourism destinations.
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