복합 질환 관련 SNP 상호작용 예측을 위한 국소탐색 알고리즘

홍원표 ( Won-pyo Hong ),위규범 ( Kyubum Wee ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.2

최근 GWAS(Genome-wide association study)로 인해 수십만 개의 SNP들이 사용 가능하게 되었다. 그러나 SNP 정보의 양이 방대하여 모든 SNP 조합을 검토하는 방식은 계산 비용이 클 뿐 아니라 오버피팅의 위험이 따른다. 본 논문에서는 필터링 기반 알고리즘인 SNPHarvester의 속도를 개선하고 평가함수를 상호정보량으로 대체하여 실험한다. 기존 SNPHarvester와 비교해 속도면에서 50%가 향상되었고 평가함수 면에서는 기존 SNPHarvester와 동일한 성능을 보였다.

마이크로터빈발전시스템 계통연계운전을 위한 동적 모델링 및 시뮬레이션

홍원표(Won-Pyo Hong),조재훈(Jea-Hoon Cho) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월

Distributed Generation (DG) is predicted to playa important role in electric power system in the near future. insertion of DG system into existing distribution network has great impact on real-time system operation and planning. It is widely accepted that micro turbine generation (MTG) systems are currently attracting lot of attention to meet customers need in the distributed power generation market In order to investigate the performance of MT generation systems, their efficient modeling is required. This paper presents the modeling and simulation of a MT generation system suitable for grid-connected operation. The system comprises of a permanent magnet synchronous generator driven by a MT. A brief description of the overall system is given, and mathematical models for the MT and permanent magnet synchronous generator are presented. Also, the use of power electronics in conditioning the power output of the generating system is demonstrated. Simulation studies with MATLAB/Simulink have been carried out in grid-connected operation mode of a DG system. The control strategies for grid connected operation mode of DG system is also presented.

마이크로터빈발전시스템 독립운전을 위한 동적 모델링 및 시뮬레이션

홍원표(Won-Pyo Hong),조재훈(Jea-Hoon Cho) 한국조명·전기설비학회 2009 한국조명·전기설비학회 학술대회논문집 Vol.2009 No.5월

Distributed Generation (DG) is predicted to play a important role in electric power system in the near future. insertion of DG system into existing distribution network has great impact on real-time system operation and planning. It is widely accepted that micro turbine generation (MTG) systems are currently attracting lot of attention to meet customers need in the distributed power generation market. In order to investigate the performance of MT generation systems, their efficient modeling is required. This paper presents the modeling and simulation of a MT generation system suitable for isolated operation. The system comprises of a permanent magnet synchronous generator driven by a MT. A brief description of the overall system is given, and mathematical models for the MT and permanent magnet synchronous generator are presented. Also, the use of power electronics in conditioning the power output of the generating system is demonstrated. Simulation studies with MATLAB/Simulink have been carried out in islanding operation mode of a DG system.

보문 : 패션기업의 콜레보레이션 실태와 특성

홍원표 ( Won Pyo Hong ),황진숙 ( Jin Sook Hwang ) 韓國衣類學會 2006 한국의류학회지 Vol.30 No.7

목감천 유역의 토지 이용 변화에 따른 물순환 모의

홍원표(Hong Won-Pyo),정은성(Chung Eun-Sung),이길성(Lee Kil Seong) 대한토목학회 2008 대한토목학회 학술대회 Vol.2008 No.10

토목섬유 보강 성토지지말뚝의 설계사례 연구

홍원표(Won Pyo Hong),이재호(Jae Ho Lee),조삼덕(Sam-Deok Cho),이광우(Kwang Wu Lee) 한국토목섬유학회 2006 한국토목섬유학회 학술발표회 Vol.2006 No.4

Geosynthetic-reinforced and pile-supported (GRPS) systems have been used for several application fields in foreign countries. A series of researches have been performed to evaluate the effects of GRPS system in the internal field which is supposed damage due to lateral soil movement in soft ground. This paper describes a design case of GRPS system which is used as countermeasure against lateral movement of piled bridge abutment on soft ground. Useful design method for GRPS system is proposed through a design case

유도전동기 베어링고장진단을 위한 고정자전류프로세싱 기술개발

홍원표(Won-Pyo Hong),윤충섭(Sup-Chung Yoon),김동화(Dong-Hwa Kim) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월

이 논문은 다른 종류의 유도전동기 구름베어링 손상을 유도전동기 고정자 전류신호해석을 통하여 검출하고 실시간으로 손상을 진단하는 알고리즘을 개발하였다. 유동전동기 구름베어링의 손상을 검출하기 위하여 정상적인 베어링을 갖는 유도전동기, 축정열에 불량을 가지고 있는 전동기와 베어링 외륜에 구멍을 가지고 있는 2가지 종류의 비정상 베어링을 갖는 유동전동기 3set을 실험시스템으로 구축하였다. 또한 유도전동기의 구름베어링시스템의 비정상적인 상태에서 고정자전류를 검출하기 위하여 TMS320F2407 DSP 칩을 이용하여 데이터의 획득보드를 개발하였다. 이 고정자전류신호를 해석을 통하여 베어링 손상을 검출하기 위한 방법으로 FFT, 웨이브렛 분석 및 내적에 의한 평균신호패턴에 의한 분석결과를 제시하였다. 특히 내적에 의한 신호분석을 통하여 베어링 손상 여부를 실시간으로 진단할 수 있는 새로운 알고리즘과 분석방법을 제시하였다.

측방유동지반상 말뚝기초교대의 측방이동 평가

홍원표(Hong Won Pyo),이광우(Lee Kwang Wu),조삼덕(Cho Sam Deok),이재호(Lee Jae Ho) 대한토목학회 2007 대한토목학회논문집 C Vol.27 No.5

국내현장에서 수집된 43개 교대의 측방이동 실측자료에 대한 분석을 통해 말뚝기초교대의 측방이동을 간편하게 평가할 수 있는 방안을 제안한다. 실측된 교대측방변위를 고려하여 연약지반의 비배수전단강도와 교대배면에 작용하는 상재압의 관계를 분석한 결과, 교대 배변의 뒤채움으로 인한 상재압이 연약지반 비배수전단강도의 3배보다 작은 경우에는 실측된 교대변위가 국내 교대의 측방이동 허용치인 15㎜ 이내인 것으로 나타나, 교대 유지관리에 문제가 발생하지 않았다. 그러나 상재압이 연약지반 비배수전단강도의 3배~8.3배인 경우는, 교대변위가 15㎜~50㎜ 발생하는 것으로 나타났다. 따라서 이 경우 교대의 측방이동을 고려한 설계를 수행함으로써, 교대 측방변위를 허용치인 15㎜ 이하로 감소시켜야 한다. 특히 상재압이 비배수전단강도의 8.3배 이상이면, 50㎜ 이상의 심각한 교대변위가 발생할 수 있기 때문에, 적절한 교대 측방이동 대책공법이 강구되어야 하는 것으로 나타났다. 이러한 결과는 상재압과 비배수전단강도의 상관관계를 나타내는 사면지반의 안정수를 이용하면 측방유동지반상 말뚝기초교대의 측방이동 가능성을 간편하게 평가할 수 있음을 의미한다. 반면에 측방유동지수와 측방이동판정지수는 교대 실측변위 및 사면안전율과 상관성이 높지 않았다. 이는 경험지수만으로 교대의 측방이동 여부를 판정하는 것은 합리적이지 않음을 의미한다. 따라서 교대를 포함한 사면의 안정수가 3보다 크면, 교대기초말뚝의 사면안정 기여효과와 교대의 허용측방변위를 반영한 사면안정해석을 통해 교대 측방이동 여부를 면밀히 검토해야 한다. Field monitoring data for forty three piled bridge-abutments were investigated to suggest an evaluation method on lateral movement of the abutments. As the results of the investigation, if the surcharge pressure by backfills behind the piled-bridge abutment is less than 3 times the undrained shear strength of the soft grounds, the lateral displacement of the abutments was within 15 ㎜. Therefore, the abutment can be maintained without any problems because the abutment will move laterally within an allowable movement range. However, if the surcharge pressure is between 3 times and 8.3 times the undrained shear strength of the soft grounds, the abutments moved laterally between 15 ㎜ and 50 ㎜. In this case, the lateral displacement of the abutment should be considered on the design because the displacement may be considerable. Moreover, if the surcharge pressure behind the abutments is greater than 8.3 times the undrained shear strength of the soft grounds, the lateral displacement of the abutments could be more than 50 ㎜. In this case, a reasonable countermeasure should be applied to prevent excessive lateral displacement of the abutment, or the design of the abutment should be changed because the lateral movement is severe enough to severely damage the abutment. In tum, the stability number, which is the ratio of the surcharge pressure to the undrained shear strength can be used as the simplified empirical index to evaluate the possibility of lateral movement of abutments. However, both the lateral flow index and the lateral movement judgement index do not always show good relationship with not only the lateral displacement of the abutments but also the safety factor of slopes. Therefore, It is not always suitable to predict the lateral movement of abutments by using only conventional empirical indexes. These empirical indexes should be used together with the safety factor of slope with consideration of the allowable limit of the lateral displacement of the abutment.

금형산업을 위한 엔지니어링 서비스

홍원표(Won-Pyo Hong),남성호(Sung-Ho Nam),강은구(Eun-Goo Kang),이형욱(Hyoung-Wook Lee),조용주(Yong-Ju Cho) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.11

Die & mold design has been carried out by nonprofessional designer in die & mold field or subcontract companies although the product design has been performed by designer in Tier-0 companies. This causes numerous corrections of die & mold for one product. Since these corrections were also depended on the individual experience of designers or experts, the number of corrections could not decrease. Collaboration in dies & mold industries by using e-Manufacturing is focused on not only collaboration of manufacturing process for specified product but also the construction of collaborative model in inter- or intra-relation of enterprises. In order to conduct this collaboration, co-ownership of drawings, distribution of technical information and management of file history become essential infra-structures and co-ownership of technical engineering information or consulting using pool of professional engineers, which cannot be possessed in individual companies, becomes core elements in inter- or intra-related enterprises collaboration system. Engineering services are supporting systems of techniques or equipment for enterprises which do not have professional engineers or equipment. They consist of essential process in each manufacturing stage such as structural CAE for the evaluation of structural troubles in product design stage, injection molding CAE for the design of injection mold in die & mold design stage, Rapid Tooling or Rapid Prototyping for quick manufacturing in prototype manufacturing stage, measurement of prototypes and so on. In this work, engineering services for die & mold industry were conducted in order to activate collaboration in inter- or intra-relation of enterprises and the expended system of engineering information was also modeled using management of extracted outputs.

핵석을 포함하는 풍화사면에서의 지구물리탐사 적용사례 연구

홍원표 ( Won Pyo Hong ),김재홍 ( Jae Hong Kim ),노병돈 ( Byung Don Ro ),정교철 ( Gyo Cheol Jeong ) 대한지질공학회 2009 지질공학 Vol.19 No.1

암반내의 핵석의 존재는 불안전한 요소로 작용하고 있으며 특히, 절개사면의 경우 노출이 되지 않더라도 핵석이 풍화정도의 차이에 따라 사면의 불연속면 증가 또는 강도 감소가 되며 사면의 낙석이나 붕괴등 사면 거동의 중요한 요소로 작용한다. 연구대상 사면은 20여년전 절개가 완료되어 일부분 사면보강을 완료하였으나 적은 강우에도 잦은 낙석이 발생하여 항구적인 안정대책이 시급한 실정이었다. 탄성파탐사와 사면지질조사 결과를 비교·분석하여 핵석의 분포특성 및 규모를 파악할 수 있었다. 또한 주변 암반사면에서 DIPS 프로그램을 이용한 평사투영을 실시하여 주변 풍화토 사면에서의 핵석분포특성 및 규모 파악에 대하여 검토하였다. Existence of core stone at the inside of the Rock mass is reacting as unstable element. In particular, in case of the cut slope, even when it is not exposed, slope`s discontinuity increases or strength level decreases depending on the difference in the weathering grade when it comes to the core stone, and reacts as an important element of the slope movement such as slope`s rock fall or collapse. As for the slope that is subject to study, incision was completed after 20 years or so, and parts of the slope reinforcement was completed, but frequent rock fall occurs despite small amount of rainfall, and permanent stability measures are urgent. Refractional seismic survey and geological survey results were compared and analyzed, and reliability was improved by complementing the two survey methods, and stereo-graphic projection using DIPS program was conducted to analyze the characteristics of oore stone in the weathered soil slope.