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유전자 알고리즘과 신경망을 이용한 DNA Chip 유전자 선택 방법 연구
이호일(Ho Il Lee),최요한(Yo Han Choi),윤경오(Kyong Oh Yoon),김명선(Myoung Sun Kim),강연수(Youn Soo Kang),박현석(Hyun Seok Park) 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.2
최근 유전자 칩의 발전으로 다양하고 방대한 양의 유전자 정보를 이용한 정확하고 신뢰성 높은 분류, 군집 및 질병을 예측하는 분석 기법이 증가하고 있다. 하지만 특징적인 유전자를 선택하는 Gene Selection 기법의 종류는 많지가 않으며 주로 통계적인 방법에 의존하여 유전자를 선택하는 기법을 많이 사용하고 있다. 본 논문에서는 유전자 알고리즘과 신경망의 결합을 통한 데이터마이닝을 기반으로 신뢰성 높은 특징적인 유전자를 선택하는 Gene Selection 기법에 대하여 연구을 진행하였다.
도시철도 유지보수 예방정비체계 구축 방법론에 관한 연구
이호용(Ho-Yong Lee),한석윤(Seok-Youn Han),박기준(Kee-Jun Park),배철호(Chul-Ho Bae),서명원(Myung-Won Suh) 한국철도학회 2004 철도저널 Vol.7 No.3
The safety of staff, customers and of general Public in general viewed as one of the most important requirements in the urban transit. The maintenance computerization system for car of urban transit is a part of standardization and development of urban transit system, and We have been performed the establishment of maintenance computerization system from 2001 to 2005. The RAMS (reliability, availability, maintainability and safety) estimation for maintenance computerization system are utilized in a variety of computerization system for user's convenience and safety in maintenance. Ever since its inception though, the urban transit has searched for ways to improve reliability, availability, maintainability and safety of the railway subsystem. Provision of a reliable maintenance system include RAMS of the vehicles plays a very important role in achieving a safe system.
도시철도유지보수체계 시스템의 예방정비시스템에 대한 연구(Ⅰ)
이호용(Ho-Yong Lee),박기준(Kee-Jun Park),안태기(Tae-Ki Ahn),김길동(Gil-Dong Kim),한석윤(Seok-Youn Han) 한국철도학회 2003 철도저널 Vol.6 No.2
The safety of staff, customers and of general Public in general viewed as one of the most important requirements in the urban transit. The maintenance computerization system for car of urban transit is a part of standardization and development of urban transit system, and We have been performed the establishment of maintenance computerization system from 2001 to 2005. The RAMS(reliability, availability, maintainability and safety) estimation for maintenance computerization system are utilized in a variety of computerization system for user's convenience and safety in maintenance. Ever since its inception though, the urban transit has searched for ways to improve reliability, availability, maintainability and safety of the railway subsystem. Provision of a reliable maintenance system include RAMS of the vehicles plays a very important role in achieving a safe system.
이호용(Ho-Yong Lee),한석윤(Seok-Youn Han),박기준(Kee-Jun Park),서명원(Myung-Won Suh) 한국철도학회 2004 철도저널 Vol.7 No.4
BOM(Bill of Materials) is a listing or description of raw materials, parts, and assemblies that define a product. In order to evaluate the performance of proposed BOM management system, which is very important to maintenance information system of urban transit. We develop component based BOM data and rule-set to design data structure that is mutually independent and integrated efficiently. It divides data whit management interface using component technology. The component based master BOM have advantage in database size and flexibility. Flexibility is measured as the number of updating records in accordance with added new product or engineering change. In database size, component based BOM is the best. we develop master BOM management system in web environment.
백금촉매상에서 일산화탄소와 일산화질소의 반응에 관한 연구
박윤석,김영호,이호인 ( Youn Seok Park,Young Ho Kim,Ho In Lee ) 한국공업화학회 1990 공업화학 Vol.1 No.2
자동차 배기가스 정화용 촉매계에서 중요하게 취급되는 CO와 NO와의 산화환원반응을 다결정 Pt표면위에서 초고진공계를 이용한 열탈착분광법(TDS)과 정상상태 실험을 통하여 알아 보았다. CO와 NO의 압력이 각각 1 × 10^(-7) Torr로 일정할 때 CO_2의 생성속도는 560K에서 최대값을 보였으며, 반응온도가 560K, NO압력이 1 × 10^(-7) Torr로 일정할 때, CO_2 생성속도는 CO의 압력에 대하여 1.35 × 10^(-7) Torr를 전후하여 1차에서 -0.3차로 변화하였다. 하지만 이 반응에 미치는 반응물의 압력에 의한 영향은 표면흡착질의 농도에 따라 달리 해석되어야 함을 알 수 있었다. 본 실험의 결과를 종합하여 다결정 Pt상에서의 CO와 NO와의 반응에 대한 새로운 반응기구를 제안하였다. The catalytic reaction between CO and NO on polycrystalline Pt surface, which is very important in the development of catalyst for automobile exhaust gas control, has been studied using thermal desorption spectrometry(TDS) and steady-state experiment under ultra-high vacuum(UHV) conditions. With the pressures of CO and NO of each 1 × 10^(-7) Torr, the CO_2 formation rate showed a maximum at 560K. At the reaction temperature of 560K and the NO pressure of 1 ×10^(-7) Torr, the production of CO_2 was first order in CO pressure below 1.35 ×10^(-7) Torr of CO pressure whereas at higher CO pressures the rate became minus 0.3 order in CO. But the effects of reactant pressure on the reaction was understood in consideration of the surface concentrations of adsorbates. With the results, we proposed a new reaction mechanism for this reaction.
한석윤(Han Seok-Youn),정종덕(Chung Jong-Duk),김연수(Kim Yeon-Su),이호용(Lee Ho-Yong),박성혁(Park Sung-Hyuk),최출헌(Choi Chool-Hoen) 한국철도학회 2000 한국철도학회 학술발표대회논문집 Vol.- No.-
The carbody of the Korean Rubber Tired AGT is small size and light weight comparing to existing electric railcars. For this reasons, car shape and arrangement of major equipmemts are limited. AGT is newly adopted mass trnsportation system in Korea. Therfore, it should be desined to appeal to passengers and create new passenger demand. To achieve this goal, the design concept of carbody is to be new design to coincide with passengers emotions. In this regard, we tried to meet this trends through manufacturing of scaled models and being evaluated by potential opeation organization.
MoO<sub>3</sub> 촉매상에서의 메탄올 부분산화반응
김정희,박윤석,이호인,Kim, Jeong-Hi,Park, Youn-Seok,Lee, Ho-In 한국공업화학회 1991 공업화학 Vol.2 No.2
고진공계에서의 열탈착실험을 통하여 $MoO_3$ 촉매상에서의 $CH_3OH$ 분해 및 부분산화반응에 관한 연구를 수행하였다. $CH_3OH$는 촉매표면에 methoxy($-OCH_3$)와 수소원자(-H)의 형태로 흡착되어 있다가 흡착수소원자가 methoxy 와 재결합하면서 425 K에서 $CH_3OH$로 탈착하였으며, methoxy로부터 수소원자가 떨어져 나가면서 545 K에서 HCHO가 탈착되었다. 이때 반응에 의해서 생성된 물은 428 K에서 탈착하는 ${\alpha}$-피크와 586 K에서 탈착하는 ${\beta}$-피크를 보였으며, ${\alpha}$-피크는 표면에 형성된 hydroxyl 에 기인하는 탈착피크, ${\beta}$-피크는 methoxy가 수소를 잃으면서 HCHO의 형태로 촉매표면에서 탈착하면서 남긴 표면수소원자와 격자산소가 반응하여 생성된 물에 각각 기인하는 것으로 보였다. 선흡착된 산소원자는 $CH_3OH$의 분해흡착을 촉진시킴으로써 $CH_3OH$의 흡착량을 증가시킨 반면, 선흡착된 물은 분해흡착하여 $CH_3OH$의 흡착점을 점유함으로써 $CH_3OH$의 흡착량을 감소시켰다. The dissociation and partial oxidation of $CH_3OH$ on polycrystalline $MoO_3$ powder catalyst were studied using thermal desorption spectrometry(TDS) under high vacuum condition. $CH_3OH$ was dissociatively adsorbed on $MoO_3$ in the forms of surface methoxy($-OCH_3$) and atomic hydrogen(-H). $CH_3OH$ desorbed at 425 K via the re-association of methoxy and adsorbed hydrogen atom, and HCHO desorbed at 545 K through the bond breakage of C-H in methoxy. Water TDS spectra showed two desorption peaks, that is, ${\alpha}$-peak at 428 K and ${\beta}$-peak at 586 K. It was suggested that ${\alpha}$-peak was due to the hydroxyl formed on $MoO_3$ surface during the dissociation of $CH_3OH$, and that ${\beta}$-peak was from the association of lattice oxygen and surface hydrogen atom formed by the bond breakage of C-H in methoxy. Pre-adsorbed oxygen on the surface of $MoO_3$ catalyst increased the amount of adsorption of $CH_3OH$ by promoting the dissociation of $CH_3OH$ on the surface, whereas pre-adsorbed water decreased the amount of adsorption of $CH_3OH$ by blocking of adsorption sites for $CH_3OH$.