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능동 데이터베이스에서 내포된 규칙 실행 처리의 비 종료 방지를 위한 전략
오성균(Sung Kyun Oh),이재호(Jae Ho Lee),임해철(Hae Chull Lim) 한국정보과학회 1998 한국정보과학회 학술발표논문집 Vol.25 No.1B
본 논문은 능동 데이터베이스에서 규칙 실행 처리에 대한 흐름과 내포된 규칙 실행에서의 무한 반복 연쇄 트리거링 비 종료와 관련된 문제점을 제시하고, 이에 따른 해결책으로 기존 규칙 정의 구조의 이벤트 부분에 트리거된 플래그와 레벨 단계 번호를 기억시키는 파라미터를 첨가하여 확장된 규칙 정의 구조를 제안하였다. 또한 내포된 규칙의 의존도에 따라 런 타임시 동적으로 트리거링하는 규칙에 트리거된 플래그를 검사하여 무한 반복 연쇄 트리거링 비 종료를 제거하는 알고리즘을 제안하였다.
모발에 대한 연구(제2보) Circlular Paper Chromatography법에 이한 Trace Elements의 정량법에 대하여
이해빈(Hae Bin Lee),오성예(Sung Yea Oh),허금(Kum Haw) 대한약학회 1959 약학회지 Vol.4 No.1
The method for the estimation of trace elements in hair is studied on this paper modifying the circular paper chromatography method shown by Giri and Balakrishnan for the estimation of vitamins from the multivitamin preparation. The elements studied are Ni, Al, Mn, Mg, Zn, Ca, Co, Cu, and Fe. The content of the element is estimated quantitatively by comparison the size and the color density of spots of the standard chromatogram prepared by the known amount of each standard substance and the chromatogram prepared from sample solution, after checking those chromatogram qualitatively. The comparative study has been made between the results from this method and the results from the other methods which are applying routinely at this laboratories. The experimental errors at each elements were within 10% limits. There was no interference between each elements. It is recommendable that this method can be applied to treat numerous specimens saving times within experimental error of 10%.
화재안전성능분야에 대한 표현방법에 관한 한.일 의식조사 비교 연구
구인혁(Koo, In-Hyuk),오성해(Oh, Sung-Hae),서광현(Seo, Kwang-Hyun),이재영(Lee, Jae Young),좌등박신(Sato, Hiroomi),권영진(Kwon, Young-Jin) 한국화재소방학회 2008 한국화재소방학회 학술대회 논문집 Vol.2008 No.추계
As for the performance related to a fire safety like fire resistance efficiency and evacuation safety etc. It is the ain of this study to investigate the comparative survey of expression methods for fire safety performance in Korea and Japan. The results of this study that there are so difference between Japan and Korea and suggests that the necessity for converting the fire risk calculated by an advanced technique into a simple expression.
지열히트펌프를 이용한 습식.건식 바닥난방 성능평가 연구
이병두(Lee, Byoung-Doo),이세진(Lee, Se-Jin),이대우(Lee, Dae-Woo),오성해(Oh, Sung-Hae),남우동(Nam, Woo-Dong) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
The present study conducted comparative evaluation of wet dry floor heating systems using geothermal heat pump. Circulation hot water from geothermal heat pump which is 10{sim}15?C lower than that from boiler was used. In order to access indoor temperature (25?C) it took 74 minutes for dry type and 247 minutes for wet type. Average floor temperature was 23.89?C for wet type and 32.66?C for dry type. Energy saving rate gradually increased by 66% after 138 minutes. In the results, for floor heating system using low temperature circulation water, wet type was not enough to meet stable and comfortable radiant floor heating due to low floor temperature and access time to indoor set temperature. While dry type was practicable for stable floor heating due to fast rise of indoor set temperature and comfortable floor temperature.
이병두(Byoung-Doo Lee),이세진(Se-Jin Lee),김강석(Kangsuk Kim),오성해(Sung-Hae Oh),김인호(In-Ho Kim),남우동(Woo-Dong Nam),이대우(Dae-Woo Lee) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
The aim of the research is to analyze the capacity of Wet·Dry floor heating systems. 1) In order to reach indoor set temperature (30℃) after boiler operation, wet floor heating system take 391 minutes. on the other hand dry floor heating system take 89 minutes. 2) Maximum difference between the supply and return temperature (ΔT) is 7.6℃ for wet type system and 6.5℃ for dry type system. 3) Wet type system is advantageous for retaining a comfortable temperature (31℃)<SUP>1)</SUP> of the floor surface compared with dry type system. Average floor surface temperature of wet type is 33℃ (max : 39.3℃) and that of dry type is 36℃ (max : 40.1℃). 4) Energy-saving rate of dry type go up to 73.2% after boiler operation for about 7 hours 43 minutes and then it is gently reduced by 30∼42.9% after 47 hours.
지열히트펌프를 이용한 습식.건식 바닥난방 성능평가 연구
이병두(Lee, Byoung-Doo),이세진(Lee, Se-Jin),이대우(Lee, Dae-Woo),오성해(Oh, Sung-Hae),남우동(Nam, Woo-Dong) 한국신재생에너지학회 2009 신재생에너지 Vol.5 No.4
The present study was conducted for a comparative evaluation of wet and dry floor heating systems using geothermal heat pump. We circulated hot water from geothermal heat pump which is 10{sim}15?C lower than that from boiler. In order to access indoor temperature (25?C) it took 74 minutes for dry type and 247 minutes for wet type. Average floor temperature was 23.9?C for wet type and 32.7?C for dry type. Energy saving rate gradually increased by 66% after 138 minutes. As a result, in case of floor heating system using low temperature circulation water, dry type was more practicable for stable floor heating than wet type in terms of floor temperature and access time to indoor set temperature.
자동차 현가 부품의 유연 다물체 동역학 해석을 이용한 시스템 단위의 내구해석
이철(Chul Lee),강오성(Oh sung Kang),김동석(Dong seok Kim),류영일(Youngil Ryu),이해순(Hae soon Lee) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Being supported by computer power enhancement, we can now extract component input forces from multi-body vehicle model running virtual durability test track directly. Hence, recently, fatigue analysis could get more power because input forces or component dynamic stress history could be calculated from dynamic simulation not from real test. In this paper, a virtual durability test process using multi-body dynamic simulation and fatigue analysis simultaneously is introduced. In dynamic simulation flexible bodies are considered when their natural modes conflict the frequency characteristics of road load. And, in fatigue analysis a seam weld model is considered.