http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
조홍범 ( Hong Beom Cho ),조우석 ( Woo Sug Cho ),박준구 ( Jun Ku Park ),송낙현 ( Nak Hyun Song ) 大韓遠隔探査學會 2008 大韓遠隔探査學會誌 Vol.24 No.2
건물의 3차원 모델링은 3차원 공간정보를 구축하는데 있어서 매우 중요한 요소이다. 기존의 3차원 건물 모델링은 대부분 항공사진측량기술을 이용하여 수동으로 진행되어 많은 시간과 비용이 소요된다. 이러한 한계를 극복하기 위한 방안으로 최근에는 항공라이다(LiDAR) 데이터를 이용한 건물모델링 방법에 대한 많은 연구가 활발히 진행되고 있다. 항공라이다 데이터를 이용한 대부분의 3차원 건물모델링 연구는 보간과정을 통하여 격자구조로 변환하거나 수치지도 또는 항공영상 등의 이종 데이터간의 융합을 통하여 건물을 모델링하는 방안 등을 제시하였다. 본 논문에서는 점 데이터의 격자구조로의 변환 및 이종 데이터간의 융합 등의 방법을 배제하고 항공라이다 데이터만을 이용한 건물의 자동 모델링 방법을 제안하였다. 건물로 분류된 항공라이다 데이터를 옥트리 분할을 기반으로 3차원 공간상에서 재귀적으로 분할하여 패치(patch)를 구성하고, 동일한 속성을 갖는 패치들을 병합하여 건물의 구성요소를 추출한다. 추출되어진 건물의 구성요소를 대표하는 모델을 생성하여 전체적인 건물의 3차원 모델을 구성한다. 항공라이다 데이터를 이용하여 제안된 방법으로 실험한 결과, 다양한 형태의 건물 모델을 자동으로 구성할 수 있었다. The 3D building modeling is one of crucial components in constructing 3D geospatial information. The existing methods for 3D building modeling depend mainly on manual photogrammetric processes, which indeed take great amount of time and efforts. In recent years, many researches on 3D building modeling using aerial LiDAR data have been actively performed to aim at overcoming the limitations of existing 3D building modeling methods. Either techniques with interpolated grid data or data fusion with digital map and images have been investigated in most of existing researches on 3D building modeling with aerial LiDAR data. The paper proposed a method of 3D building modeling with LiDAR data only. Firstly, octree-based segmentation is applied recursively to LiDAR data classified as buildings in 3D space until there are no more LiDAR points to be segmented. Once octree-based segmentation is completed, each segmented patch is thereafter merged together based on its geometric spatial characteristics. Secondly, building model components are created with merged patches. Finally, a 3D building model is generated and composed with building model components. The experimental results with real LiDAR data showed that the proposed method was capable of modeling various types of 3D buildings.
안영범,조홍범,최영길 ( Young Beom Ahn,Hong Bum Cho,Yong Keel Choi ) 한국하천호수학회 1996 생태와 환경 Vol.29 No.3
The effects of acidification (acidic proceeding) on the physico-chemical factors and bacterial population in Wangsong reservoir, Kyonggi-Do were studied in batch culture microcosm system during the summer of 1995. The numbers of total bacteria, hetero-trophic bacteria and functional groups of bacteria were ranged from 0.71 to 2.42×10^6cells/ml and from 0.001×10^4 to 9.33×10^5cfu/ml at various pH values in batch culture system, respectively. Acid stress had no apparent effect on total bacteria, in contrast heterotrophic bacteria and functional groups of bacteria showed response to pH changes. The mean percentage of heterotrophic bacteria and functional groups of bacteria among total bacteria were 16.53% and below about 1%, respectively. Heterotrophic bacteria and functional groups of bacteria showed a positive correlation with pH, turbidity, and dissolved oxygen, whereas it showed significant negative correlation with ammonia, Al, Mn, Zn, and Cu.
연속식 다단계 microcosm 에서 수계 세균 군집 및 세포외 효소 활성도 변화에 미치는 산성화의 영향
안영범,조홍범,최영길 ( Young Beom Ahn,Hong Bum Cho,Yong Keel Choi ) 한국환경생물학회 1998 환경생물 : 환경생물학회지 Vol.16 No.1
To define the effects of acidification on physicochemical factors, bacterial numbers, functional groups of bacteria and extracellular enzyme activities were analyzed in the continuous multistage microcosm. The concentrations of nitrate, nitrite, phosphate and soluble sugar were decreased and ammonia and heavy metal were increased as pH became lower. The total bacterial numbers of heterotrophic bacteria including functional groups of bacteria showed the ranges of 5.6∼16. 2 × 10 exp (5) cells/㎖ and 0.07 ∼ 32.47 × 10 exp (4) CFU/㎖ at various pH values, respectively. There were no significant correlation between total bacteria and water pH, but viable counts of heterotrophic bacteria decreased as pH became lower. The activities of extracellular enzyme showed the ranges of 0.022 ∼ 1.811 μM/ℓ/hr in continuous multistage microcosm. Activities decreased rapidly down to the pH 5. The continuous multistage microcosm was useful system to examine simulation analysis of acidification. The effects accompanied the changes of structures and functions of bacterial communities in aquatic ecosystem.
신성화에 따른 수계 세균 군집 및 세포외 효소의 활성도 변화
안영범,조홍범,최영길 ( Young Beom Ahn,Hong Bum Cho,Yong Keel Choi ) 한국하천호수학회 1997 생태와 환경 Vol.30 No.3
Physicochemical factors, functional populations of bacteria and their extracellular enzyme activities were analyzed in the bioreactor in order to observe the effects of acidification in Wangsong reservoir, Kyonggi-Do during the summer of 1996. The concentrations of ammonia and nitrate decreased and soluble sugar and heavy metal increased as pH became lower. The numbers of total bacteria, heterotrophic bacteria including functional populations of bacteria showed the ranges of 4.37∼10.31×10^6 cells/ml and 0.02∼7.77×10^4 CFU/ml at various pH values in bioreactor. There were no significant correlations between total bacteria and water pH, but viable counts of heterotrophic bacteria decreased as pH became lower. The activities of extracellular enzyme skewed the ranges of 0.008∼0.292㎛/ℓ/hr in bloreactor system. Enzymatic activities decreased rapldly below pH 5 and then sustained 5∼38% at lower pH values. The functional populations of bacteria and their extracellular enzyme activities showed conspicuously positive correlation with pH (0.80∼0.93, p<0.01). So, there were interpreted by the direct effect of pH rather than indirect effect of various environmental factors.
수계 세균 군집의 세포외 효소 활성도 및 형태적 변화에 미치는 산성화의 영향
안영범,조홍범,최영길 ( Young Beom Ahn,Hong Bum Cho,Yong Keel Choi ) 한국환경생물학회 1997 환경생물 : 환경생물학회지 Vol.15 No.2
The effects of acidification on extracellular enzyme activities and morphological changes of bacteria were analyzed in the continuous microcosm. The activities of various extracellular enzyme such as lipase, phophatase, amylase, cellulase, β-glucosidase and chitinase showed the ranges of 0.022-1.811 μM/ℓ/hr. Enzymatic activities showed lower at pH 3 than at pH 7 and then sustained 4∼74% at lower pH values. As electron microscopy, bacterial cell surface has been pitted and covered with electron-dense fibrils and granules according to acidification. Also, inner layer of cell membrane was produced electron-dense granules, but cytoplasm and nuclear materials were not significantly change at all pH ranges. The cytological changes in the heterotrophic bacterial cells by the acidification correlate also with changes in activity of extracellular enzymes.
다차원 도시시설물 관리를 위한 멀티 텍스처 기법과 다중 스레드 기법의 적용에 관한 연구
최근호,강병준,조홍범,김원철,Choi, Keun-Ho,Kang, Byoung-Jun,Cho, Hong-Beom,Kim, Won-Cheol 한국공간정보학회 2010 한국공간정보학회지 Vol.18 No.1
최근까지 도시시설물 관리를 위해 활용된 GIS 기술은 주로 2차원 기반의 GIS 기술이었다. 하지만 도시시설물은 3차원 공간상에 존재하며 이를 2차원으로 추상화시키면 정보의 손실이 일어나게 된다. 또한 도시 공간 내에 점차 시설물의 수가 증가하고 있고 대부분의 도시시설물이 지하공간에 위치하기 때문에 2차원 기반의 시스템에서 도시 내 모든 시설물의 정보를 통시에 파악하고 관리하는 것이 어려워지고 있다 본 논문에서는 멀티 텍스처 기법을 이용한 다차원 도시시설물 관리 시스템을 제안한다. 제안된 시스템은 3차원 상에서 도시시설물을 가시화하여 데이터의 손실을 줄이고 정보의 가독성을 높이며, 2차원 벡터 데이터의 3차원 라스터 변환을 통한 가시화 기법을 개발하여 다양한 2차원 GIS 의 공간분석 결과를 3차원 데이터와 동시에 활용할 수 있도록 한다. 또한 3차원 데이터를 처리하는 경우에 시스템의 속도 및 성능이 저하되어 활용 효율성이 떨어지는 문제를 해결하기 위하여 다중 스레드 프로세스를 적용하였다. 본 논문에서 제안한 기술은 기존에 텍스처를 통해 보여주던 센서의 상태정보를 3차원 영상, 시설물 데이터와 함께 시각정보로 표출함으로써 직관적인 시설물 모니터링이 가능해졌다는데 의의가 있다. Recently, 2D GIS technology is applied for urban facility management. However, urban facilities are located in 3D space and the information loss is occurring during data abstraction from 3D urban facility to 2D object. Also, the number of urban facilities is increasing steadily and most of urban facilities are located in underground space in the city. Therefore 2D urban facility management system has a limitation on visualization and management for a large number of urban facilities. In this paper, a multi-dimensions urban facility management system based on multi-texture technology is proposed. The proposed system reduces the information loss and improves the readability of information by visualizing urban facilities on 3D virtual space. A multi-texturing technology is applied for integrating of 2D vector data and 3D raster data, and a multi-thread technology is used for improving speed and performance of the system. The proposed technology can be used as a guideline for urban facility monitoring as providing visual information of a facility status with 3D image and facility data.
열풍기를 이용한 콘크리트 급열 보양 시 양생가옥 내 온도 분포 개선 방안
최지수(Choi, Ji-Su),김상엽(Kim, Sang-Yeop),송진희(Song, Jin-Hee),조홍범(Cho, Hong-Beom),이규남(Rhee, Kyu-Nam) 대한건축학회 2022 대한건축학회 학술발표대회 논문집 Vol.42 No.1
In winter, low outdoor temperature can casue reduction of concrete strength. Therefore, thermal protection is required when curing concrete in winter to maintain a certain level or higher surface temperature. Accordingly, in domestic construction sites, a curing method in which surrounds casting areas by tents and operates hot air blowers are widely applied. However, local low-temperature areas may occur due to airtightness of the curing tents. If additional heat is supplied to prevent occurrence of local low-temperature areas, energy consumption increases. Therefore in this study, a plan for improvement method of concrete curing was considered and the performance was evaluated through numerical analysis. A plan to improve the airtightness of the wall opening was applied, but the analysis showed that if only a part of the curing area is shielded, the temperature of the unshielded area decreases,making it inappropriate to improve curing performance.