http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
PULSATIONAL CHARACTERISTICS OF $\delta$ SCUTI VARIABLE HR1170
Kim, Seoung-Li,Lee, See-Woo The Korean Astronomical Society 1990 Journal of The Korean Astronomical Society Vol.23 No.1
New uvby photoelectric photometry was carried out for a $\delta$ Scuti variable, HR1170. By applying the Fourier method and the linear least square method, three frequencies were derived: $f_1=10.06134c/d$ ($P_1=0.^d0994$). $f_2=11.91754c/d$ ($P_2=0.^d0839$). $f_3=18.96776c/d$ ($P_3=0.^d0527$). From the observed pulsational constants and from the phase difference and amplitude ratios for color(b-y) and magnitude y. three different pulsation modes (n, l) of $f_1(0,0)$, $f_2(1,2)$, $f_3(3,2)$ are deduced, indicating the existence of nonradial mode in HR1170. Some physical parameters indicate that HR1170 is evolving at the stage of H-shell burning.
김동욱(Kim Dong Wook),구성영(Koo Seoung Young),리위룽(Yulong Li) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
본 논문은 계통연계형 1.65MW급 DFIG형 풍력발전에 적용되는 제어시스템에 대해 기술한다. 풍력발전기를 원활하게 제어하기 위해서는 발전기 및 블레이드 뿐만 아니라 기어박스, 발전기, 브레이크, 냉각장치, 전력변환장치, 타워, 계통연계보호 장치, 변압기, 제어감시장치등의 구성요소가 상호 유기적으로 동작할 수 있도록 제어시스템이 구성되어야 한다. 본 논문은 1.65MW용 풍력발전기의 구성을 알아보고 각 시스템을 제어하기 위한 원격제어 감시시스템의 구성에 대하여 기술한다.
Lee, Seoung Soo,Li, Zhanqing,Zhang, Yuwei,Yoo, Hyelim,Kim, Seungbum,Kim, Byung-Gon,Choi, Yong-Sang,Mok, Jungbin,Um, Junshik,Choi, Kyoung Ock,Dong, Danhong Copernicus GmbH 2018 Atmospheric Chemistry and Physics Vol.18 No.1
<P>Abstract. This study investigates the roles played by model resolution and microphysics parameterizations in the well-known uncertainties or errors in simulations of clouds, precipitation, and their interactions with aerosols by the numerical weather prediction (NWP) models. For this investigation, we used cloud-system-resolving model (CSRM) simulations as benchmark simulations that adopt high-resolution and full-fledged microphysical processes. These simulations were evaluated against observations, and this evaluation demonstrated that the CSRM simulations can function as benchmark simulations. Comparisons between the CSRM simulations and the simulations at the coarse resolutions that are generally adopted by current NWP models indicate that the use of coarse resolutions as in the NWP models can lower not only updrafts and other cloud variables (e.g., cloud mass, condensation, deposition, and evaporation) but also their sensitivity to increasing aerosol concentration. The parameterization of the saturation process plays an important role in the sensitivity of cloud variables to aerosol concentrations. while the parameterization of the sedimentation process has a substantial impact on how cloud variables are distributed vertically. The variation in cloud variables with resolution is much greater than what happens with varying microphysics parameterizations, which suggests that the uncertainties in the NWP simulations are associated with resolution much more than microphysics parameterizations. </P>
Lee, Seoung Soo,Kim, Byung-Gon,Li, Zhanqing,Choi, Yong-Sang,Jung, Chang-Hoon,Um, Junshik,Mok, Jungbin,Seo, Kyong-Hwan Copernicus GmbH 2018 Atmospheric Chemistry and Physics Vol.18 No.16
<P>Abstract. This study examines the role played by aerosol in torrential rain that occurred in the Seoul area, which is a conurbation area where urbanization has been rapid in the last few decades, using cloud-system-resolving model (CSRM) simulations. The model results show that the spatial variability in aerosol concentrations causes the inhomogeneity of the spatial distribution of evaporative cooling and the intensity of associated outflow around the surface. This inhomogeneity generates a strong convergence field in which torrential rain forms. With the increases in the variability in aerosol concentrations, the occurrence of torrential rain increases. This study finds that the effects of the increases in the variability play a much more important role in the increases in torrential rain than the much-studied effects of the increases in aerosol loading. Results in this study demonstrate that for a better understanding of extreme weather events such as torrential rain in urban areas, not only changing aerosol loading but also changing aerosol spatial distribution since industrialization should be considered in aerosol-precipitation interactions. </P>
Effects of aerosol on evaporation, freezing and precipitation in a multiple cloud system
Lee, Seoung Soo,Kim, Byung-Gon,Yum, Seong Soo,Seo, Kyong-Hwan,Jung, Chang-Hoon,Um, Jun Shik,Li, Zhanqing,Hong, JinKyu,Chang, Ki-Ho,Jeong, Jin-Yim Springer-Verlag 2017 Climate dynamics Vol.48 No.3
<P>Aerosol effects on clouds and precipitation account for a large portion of uncertainties in the prediction of the future course of global hydrologic circulations and climate. As a process of a better understanding of interactions between aerosol, clouds and precipitation, simulations are performed for a mixed-phase convective multiple-cloud system over the tropics. Studies on single-cloud systems have shown that aerosol-induced increases in freezing, associated increases in parcel buoyancy and thus the intensity of clouds (or updrafts) are a main mechanism which controls aerosol-cloud-precipitation interactions in convective clouds. However, in the multiple-cloud system that plays much more important roles in global hydrologic circulations and thus climate than single-cloud systems, aerosol effects on condensation play the most important role in aerosol-induced changes in the intensity of clouds and the effects on freezing play a negligible role in those changes. Aerosol-induced enhancement in evaporation intensifies gust fronts and increases the number of subsequently developing clouds, which leads to the substantial increases in condensation and associated intensity of convection. Although aerosol-induced enhancement in freezing takes part in the increases in condensation by inducing stronger convergence around cloud bottom, the increases in condensation are similar to one order of magnitude larger than those in freezing. It is found that while aerosol-induced increases in freezing create intermittent extremely heavy precipitation, aerosol-induced increases in evaporation enhance light and medium precipitation in the multiple-cloud system here. This increase in light and medium precipitation makes it possible that cumulative precipitation increases with increasing aerosol concentration, although the increase is small. It is interesting that the altitude of the maximum of the time- and domain-averaged hydrometeor mass densities is quite robust to increases in aerosol concentration. This is because locations of gust fronts and homogeneous freezing do not vary significantly with changing aerosol concentration and this outweighs aerosol effects on hydrometeor size.</P>
Synthesis and In Vitro Cytotoxicity of 3-or 4-Dialkylaminomethyl-1-azaanthraquinones
Lee, Heesoon,Choi, Jae-Young,Lee, Seung-lI,Hong, Seoung-Soo,Cho, Jungsook,Kim, Young-Ho 충남대학교 약학대학 의약품개발연구소 1999 藥學論文集 Vol.15 No.-
Six 3-dialkylaminomethyl-1-azaanthraquinones and five 4-dialkylaminomethyl-1-azaanthraquinones were synthesized and evaluated in vitro cytotoxicity against four human cancer cell lines. The compounds retained much of their cytotoxic activity against the multi-drug-resistant cell line (KB-V-1) as shown by resistance index.
Dynamic Changes of Newly formed Wetlands in the Yellow River Mouth Based on GIS and Remote Sensing
Zhao, Gengxing,Shi, Yanxi,Chen, Weifeng,Li, Jing,Ann, Seoung-won,Kim, Young-chil,Jung, Jea-hoon,Chae, Soo-cheon 한국환경과학회 2003 한국환경과학회지 Vol.12 No.2
The Yellow River delta is an important region where coastal and newly formed wetlands distribute in north China. Based on satellite remote sensing images and GIS techniques, This paper tends to delineate the dynamic changes of newly formed wetland in the Yellow River mouth from 1986.5 to 1996.10. Our results show that the newly formed wetland increased by 24.9 ㎢ per year after that. The northern and southwestern parts of the Yellow River mouth are main positions of decrease and the southern and the estuary parts are main positions of increase. The advancing rate of river and mouth extending into the Bo Sea is decreasing obviously. The reason for that is the decreasing of water and sediments in the Yellow River, which caused by the increasing use of water and soil conservation on upper reach.