检索结果-南通市图书馆

Assessment of Dynamic Downscaling of the Extreme Rainfall over East Asia Using a Regional Climate Model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2011年第5期28卷 1077-1098页

作者：高艳红 Yongkang XUE 彭雯 Hyun—suk kang Duane WALISER Laboratory for Climate Environment and Disasters of Western ChinaCold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 Department of Geography and Department of Atmospheric and Oceanic Sciences University of California Los Angeles California USA Climate Research Laboratory National Institute of Meteorological Research Korea Meteorological Administration Korea Jet Propulsion Laboratory/California Institute of Technology California USA

This study investigates the capability of the dynamic downscaling method （DDM） in an East Asian climate study for June 1998 using the fifth-generation Pennsylvania State University-National Center for Atmospheric Research non-hydrostatic Mesoscale Model （MM5）.Sensitivity experiments show that MM5 results at upper atmospheric levels cannot match reanalyses data,but the results show consistent improvement in simulating moisture transport at low *** downscaling ability for precipitation is regionally *** the monsoon season over the Yangtze River basin and the pre-monsoon season over North China,the DDM cannot match observed *** Northwest China and the Tibetan Plateau （TP）,where there is high topography,the DDM shows better performance than *** monsoon evolution processes over East Asia,however,are much closer to observational data than *** convection scheme has a substantial impact on extreme rainfall over the Yangtze River basin and the pre-monsoon over North China,but only a marginal contribution for Northwest China and the *** surface parameterizations affect the locations and pattern of rainfall *** 10-day re-initialization in this study shows some improvement in simulated precipitation over some sub-regions but with no obvious improvement in *** setting of the location of lateral boundaries （LLB） westward improves performance of the *** the entire TP in the western model domain improves the DDM performance in simulating precipitation in most *** addition,a seasonal simulation demonstrates that the DDM can also obtain consistent results,as in the June case,even when another two months consist of no strong climate/weather events.

关键词： DDM MM5 cumulus convection scheme land parameterization re-initialization lateral boundary location

Effect of rolling temperature on microstructure and texture of twin roll cast ZK60 magnesium alloy

在线全文

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2010年第11期20卷 2086-2091页

作者：陈洪美于化顺 suk-bong kang 闵光辉金云学 Provincial Key Lab of Advanced Welding Technology Jiangsu University of Science and Technology Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education Shandong University Korea Institute of Materials Science

Twin roll cast ZK60 alloy strip/sheet with final thickness of 0.5 mm was prepared, and effect of rolling temperature on microstructure and texture development was investigated using OM and XRD technique, microstructure and texture were measured on specimens subjected to rolling experiment at different rolling temperature, and macrotexture was also evaluated by X-ray diffraction method. In addition, the （1010）and （0002） pole figures were measured, and the tensile test was performed to reveal the influence of rolling temperature on mechanical properties. The results show that the microstrucmre of ZK60 alloy sheet consisted of fibrous structure with elongated grains, and shear bands along the rolling direction after warm rolling. Dynamic recrystallization could be found during the warm rolling process at rolling temperature 350℃ and above. And many fine recrystallized grain could be observed in the shear bands area. It is a little difficult to see the recrystallized grain in the sheet warm rolled at 300℃ because of higher density of shear bands. The warm rolled ZK60 alloy sheet exhibited strong （0002） pole texture, the intensity of （0002） pole figure decreases with the increasing of rolling temperature and the basal pole tilted slightly to the transverse direction after warm rolling.

关键词： warm rolling microstructure macrotexture pole figure ZK60 alloy

Gallstone spillage caused by spontaneously perforated hemorrhagic cholecystitis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2007年第41期13卷 5525-5526页

作者： Young Chul kim Mi-suk Park Yong Eun Chung Joon suk Lim Myeong-Jin kim ki Whang kim Department of Diagnostic Radiology and Institute of Gastroenterology Severance HospitalResearch Institute of Radiological ScienceYonsei University College of MedicineSeoulSouth Korea

There are occasional incidences of gallstone spillage during laparoscopic cholecystectomy,and there have been frequent reports on such a topic in the literature. To the best of our knowledge,however,there have been no reports about spilled stones caused by spontaneously perforated hemorrhagic cholecystitis. Here,we report the radiologic findings of spilled stones caused by spontaneously perforated hemorrhagic cholecystitis in a 55-year-old man.

关键词： Gallbladder perforation Gallstone spillage, Hemorrhagic cholecystitis

Carbonaceous aerosol in ambient air: Parallel measurements between water cyclone and carbon analyzer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2019年第3期17卷 153-158页

作者： Min-suk Bae James J. Schwab Da-Jeong Park Zang-Ho Shon ki-Hyun kim Department of Environmental Engineering Mokpo National University Muan South Korea Atmospheric Sciences Research Center University at Albany State University of New York 251 Fuller Road Albany NY 12203 USA Environmental Analysis Center Gwangju Institute of Science and Technology Gwangju South Korea Department of Environmental Engineering Dong-Eui University Busan South Korea Department of Civil and Environmental Engineering Hanyang University Seoul South Korea

A water cyclone,developed to collect and preserve biological aerosols in a small liquid flow,was interfaced with a total organic carbon analyzer to measure the aerosol organic and inorganic carbon *** total carbon was compared against parallel measurements of elemental carbon (EC) and organic carbon (OC) using a Sunset Real Time ECOC Analyzer between 12-29 January 2009.A National Institute for Occupational Safety and Health (NIOSH) like protocol for the measurements included four temperature steps ending at 840 ℃ for OC under a helium atmosphere followed by two temperature steps ramped to 850 ℃ for EC in a helium-oxygen atmosphere,Carbon data comparison between the water cyclone-TOC and the TOC measured by the analyzer indicated good agreement (r2 =0.82,linear regression slope =0.98,p < 0.001).Analyses of the relationship between total water organic carbon and OC,investigated using data sets from case studies spanning two different events,suggested it was possible to distinguish between the primary and secondary sources.

关键词： Water soluble organic carbon Total organic carbon Carbonaceous material

Novel Architecture of OneM2M-Based Convergence Platform for Mixed Reality and IoT

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第4期71卷 51-69页

作者： Seungwoon Lee Woogeun kil Byeong-hee Roh SJ kim Jin-suk kang Department of Computer Engineering and Department of AI Convergence Network Ajou UniversitySuwon16499Korea Howard R.Hughes College of Engineering University of NevadaLas VegasNV89154USA AST Co.Ltd. Suwon16681Korea

There have been numerous works proposed to merge augmented reality/mixed reality(AR/MR)and Internet of Things(IoT)in various ***,they have focused on their specific target applications and have limitations on interoperability or reusability when utilizing them to different domains or adding other devices to the *** paper proposes a novel architecture of a convergence platform for AR/MR and IoT systems and *** proposed architecture adopts the oneM2M IoT standard as the basic framework that converges AR/MR and IoT systems and enables the development of application services used in general-purpose environments without being subordinate to specific systems,domains,and device *** implement the proposed architecture utilizing the open-source oneM2M-based IoT server and device platforms released by the open alliance for IoT standards(OCEAN)and Microsoft HoloLens as an MR device *** also suggest and demonstrate the practical use cases and discuss the advantages of the proposed architecture.

关键词： Internet of things(IoT) augmented realty(AR) mixed reality(MR) microsoft HoloLens oneM2M convergence platform

Characteristics of damaged layer in micro-machining of copper material

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第B9期19卷 295-300页

作者： Dong-Hee KWON Jeong-suk kiM Myung-Chang kang Se-Hun KWON Jong-Hwan LEE School of Mechanical Engineering Pusan National University National Core Research Center for Hybrid Materials Solution Pusan National University Department of Mechatronics Busan College of Korea Polytechnic Ⅶ

The study on damaged layer is necessary for improving the machinability in micro-machining because the damaged layer affects the micro mold life and micro machine parts. This study examined the ultra-precision micro-machining characteristics, such as cutting speed, feed rate and cutting depth, of a micro-damaged layer produced by an ultra-high speed air turbine spindle. The micro cutting force, surface roughness and plastic deformation layer were investigated according to the machining conditions. The damaged layer was measured using optical microscope on samples prepared through metallographic techniques. The scale of the damaged layer depends on the cutting process parameters, particularly, the feed per tooth and axial depth of the cut. According to the experimental results, the depth of the damaged layer is increased by increasing the feed per tooth and cutting depth, also the damaged layer occurs less in down-milling compared with up-milling during the micro-machining operation.

关键词：机械加工性微观特征损伤层铜材样品制备技术微型机器切削速度切削深度

Intercomparison of Precipitation Simulated by Regional Climate Models over East Asia in 1997 and 1998

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2007年第4期24卷 539-554页

作者： Dong-Kyou LEE William J.GUTOWSki Hyun-suk kang Chun-Ji kiM School of Earth and Environmental Sciences Seoul National UniversitySeoulKorea Department of Geological and Atmospheric Sciences Iowa State UniversityAmesUSAJr Department of Atmospheric Sciences Yonsei UniversitySeoulKorea.School of Earth and Environmental SciencesSeoul National UniversitySeoulKorea

Regional climate simulations in Asia from May 1997 to August 1998 were performed using the Seoul National University regional climate model （SNURCM） and Iowa State University regional climate model （***5/LSM）, which were developed by coupling the NCAR/Land Surface Model （LSM） and the Mesoscale Model （MM5）. However, for physical processes of precipitation, the SNURCM used the Grell scheme for the convective parameterization scheme （CPS） and the simple ice scheme for the explicit moisture scheme （EMS）, while the ***5/LSM used the Betts-Miller scheme for CPS and the mixed phase scheme for EMS.The simulated precipitation patterns and amounts over East Asia for the extreme climatic summer in 1997 （relative drought conditions） and 1998 （relative flood conditions） were especially focused upon. The ***5/LSM simulated more precipitation than was observed in 1997 due to more moisture and cloud water in the lower levels, despite weak upward motion. In the SNURCM, strong upward motion resulted in more precipitation than that was observed in 1998, with more moisture and cloud water in the middle levels. In the ***5/LSM, weak upward motion, unchanged moisture in the lower troposphere, and the decrease in latent heat flux at the surface increased convective precipitation only by 3% for the 1998 summer event. In the SNURCM, strong upward motion, the increase in moisture in the lower troposphere, and the increase in latent heat flux at the surface increased convective precipitation by 48% for the summer of 1998. The main differences between both simulations were moisture availability and horizontal momentum transport in the lower troposphere, which were also strongly influenced by large-scale forcing.

关键词： regional climate simulation summer precipitation variability extreme climatic event physical process

Interdecadal Variability of East Asian Summer Monsoon Precipitation over 220 Years (1777-1997)

在线全文

学校读者我要写书评

暂无评论

Advances in Atmospheric Sciences 2010年第2期27卷 253-264页

作者： Chun-Ji kiM 钱维宏 Hyun-suk kang Dong-Kyou LEE Atmospheric Sciences Program School of Earth and Environmental Sciences Seoul National University National Institute of Meteorological Research Korea Meteorological Administration Department of Geophysics Peking University

In this study, long-term （1777–1997） precipitation data for Seoul, Korea, wetness indices from eastern China, and modern observations are used to identify the interdecadal variability in East Asian summer monsoon precipitation over the last 220 years. In the East Asian monsoon region, two long-term timescales of dry–wet transitions for the interdecadal variability and quasi-40-and quasi-60-year timescales are dominant in the 220-year precipitation data of Seoul, as well as in the wetness indices over China. The wet and dry spells between Seoul （southern China） and northern China are out-of-phase （out-of-phase） at the quasi-60-year timescale, and in-phase （out-of-phase by approximately 90 ？ before 1900 and in-phase after 1900） at the quasi-40-year timescale. In particular, during the last century, the dominant long-term timescales over East Asia tend to decrease from the quasi-60-year to the quasi-40-year with increasing time. The dominant quasi-40-year and quasi-60-year timescales of the Seoul precipitation in Korea are strongly correlated with these timescales of the northern Pacific Ocean.

关键词： interdecadal variability East Asian summer monsoon precipitation timescales dry–wet transition

Priapism secondary to penile metastasis of rectal cancer

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2009年第33期15卷 4209-4211页

作者： Ji Chan Park Wook Hyun Lee Min Kyu kang suk Young Park Division of Oncology Department of Internal MedicineThe Catholic University of KoreaDaejeon St. Mary's Hospital

Metastatic penile carcinoma is rare and usually originates from genitourinary tumors. The presenting symptoms or signs have been described as nonspecific except for priapism. Rectal adenocarcinoma is a very unusual source of metastatic penile carcinoma. We report a case of metastatic penile carcinoma that originated from the rectum. Symptomatic improvement occurred with palliative radiotherapy.

关键词： Penile neoplasms Neoplasm metastasis Priapism Rectal cancer