http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
박세희,김민수,백장선,Park, Saehee,Kim, Minsoo,Baek, Jangsun 한국데이터정보과학회 2017 한국데이터정보과학회지 Vol.28 No.1
본 연구는 아파트 개별 실거래가격에 대한 시공간 자료를 활용하여 아파트 매매가격에 영향을 미치는 요인을 시계열적 흐름과 공간적 변화를 반영한 지리시간가중 회귀모형 (geographical temporal weighted regression; GTWR)모형을 적용하여 분석하였다. 기존 연구에서 활용되었던 일반적인 접근방법인 최소제곱 (ordinary least square; OLS) 회귀모형과 공간 데이터를 분석하기 위한 공간계량 모델 중 가장 많이 활용되고 있는 지리가중 회귀모형 (geographically weighted regression;GWR)과 달리 GTWR은 주택가격 특성을 고려함에 있어서 시간과 공간을 함께 고려함으로써 보다 정밀한 평가모형이 될 것으로 기대되었다. 본 연구에 사용된 주택가격결정 설명 요인들 중에서 건축연도 및 전용면적이 주택가격을 결정하는데 유의적인 영향을 미치는 것으로 나타났으며, 주택가격이 시간적 공간적 특성 모두에 의하여 유의적으로 설명되었다. We investigate the factors affecting the price of apartments using the spatial and temporal data of private real estate prices. The factors affecting the price of apartment were analyzed using geographical and temporal weighted regression (GTWR) model which incorporates the temporal and spatial variation. In contrast to the OLS, a general approach used in previous studies, and GWR method which is most widely used for analyzing spatial data, GTWR considers both temporal and spatial characteristics of the house price, and leads to better description of the house price determination. Year of construction and floor area are selected as the significant factors from the analysis, and the house price are affected by them temporally and geographically.
박세희 대한수학회 2000 대한수학회논문집 Vol.15 No.2
평형문제들에서의 기본적인 정리들이 일반화 볼록공간에서 어떻게 확장되는가를 보인다. KKM 이론의 중요한 정리들 대부분이 위상벡터공간에서의 선형성을 가정하지 않아도 위상적인 성질만으로 성립한다. 이같은 정리들의 예로는 KKM정리, von Neumann의 최소최대정리와 교차정리, Nash의 평형정리, 여러 가지 부동점정리, 극대원정리, Ky Fan의 최소최대부등식, 변분부등식들, 최량근사정리, 일반화 의사평형문제들의 해의 존재정리들이 있다.
하천수 내 생물학적 안정성에 따른 유기물 특성변화와 오존산화기반 전처리 연구
박세희,노진형,박지원,맹승규 대한상하수도학회 2018 상하수도학회지 Vol.32 No.2
Climate change is believed to increase the amount of dissolved organic matter in surface water, as a result of the release of bulk organic matter, which make difficult to achieve a high quality of drinking water via conventional water treatment techniques. Therefore, the natural water treatment techniques, such as managed aquifer recharge (MAR), can be proposed as a alternative method to improve water quality greatly. Removal of bulk organic matter using managed aquifer recharge system is mainly achieved by biodegradation. Biodegradable dissolved organic carbon (BDOC) and assimilable organic carbon (AOC) can be used as water quality indicators for biological stability of drinking water. In this study, we compared the change of BDOC and AOC with respect to pretreatment methods (i.e., ozone or peroxone). The oxidative pretreatment can transform the recalcitrant organic matter into readily biodegradable one (i.e., BDOC and AOC). We also investigated the differences of organic matter characteristics between BDOC and AOC. We observed the decreases in dissolved organic carbon (DOC) and the tryptophan-like fluorescence intensities. Liquid chromatographic - organic carbon detection (LC-OCD) analysis also showed the reduction of the low molecular weight (LMW) fraction (15% removed, less than 500 Da), which is known to be easily biodegradable, and the biopolymers, high molecular weight fractions (66%). Therefore, BDOC consists of a broad range of organic matter characteristics with respect to molecular weight. In AOC, low molecular weight organic matter and biopolymers fraction was reduced by 11 and 6%, respectively. It confirmed that biodegradation by microorganisms as the main removal mechanism in AOC, while BDOC has biodegradation by microorganism as well as the sorption effects from the sand. O3 and O3 + H2O2 were compared with respect to biological stability and dissolved organic matter characteristics. BDOC and AOC were determined to be about 1.9 times for O3 and about 1.4 times for O3 + H2O2. It was confirmed that O3 enhanced the biodegradability by increasing LMW dissolved organic matter.
트레드밀 보행속도와 탄력가슴밴드가 제한된 가슴 움직임을 보이는 젊은 여성들의 폐기능에 미치는 영향
박세희,금승연,문주희,이채은 한국신경근육물리치료학회(구 한국신경근육재활학회) 2018 한국신경근육재활학회지 Vol.8 No.2
The purpose of this study was to examine the effects of treadmill walking speed and elastic chest band (ECB) on respiratory function in healthy young women with limited chest mobility. Twenty women with limited chest mobility were volunteered for this study. The speed of treadmill walking was determined as 3.0 km/hr and 5.5 km/hr. The ECB was set at the level between 8 and 12 ribs. A 10-min treadmill walking at each walking speed was performed with the ECB. Respiratory function was evaluated by forced vital capacity(FVC), forced expiratory volume in one second (FEV1), forced expiratory volume in one second/forced vital capacity (FEV1/FVC), peak expiratory flow(PEF), expiratory reserve volume, vital capacity, inspiratory reserve volume(IRV), Maximum voluntary ventilation(MVV). Measurements were carried out the baseline and after a 3.0 km/hr and 5.5 km/hr of treadmill walking speed. With the ECB, there was statistically significantly different for the FEV1/FVC in the treadmill walking speed of 3.0 km/hr and the PEF in the 5.5 km/hr when comparing those of the baseline (p<.05). In addition, in the treadmill walking speed of 5.5 km/hr, significant differences were found for FVC and MVV between the baseline and no ECB (p<.05). All parameters were significantly different between the baseline and treadmill walking speed of 5.5 km/hr, except values of FEV1/FVC and IRV (p<.05). These findings suggest that treadmill walking speed of 5.5 km/hr is probably more favorable to improve pulmonary function of females with limited chest mobility than the 3.0 km/hr, with incorporating of the ECB. Further studies need to evidence the generality of our results.