http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Optimization of the structural and process parameters in the sheet metal forming process
이재준,박경진 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.2
The quality of the sheet metal forming product is determined by defects such as wrinkling, springback, etc. Optimization techniquescan avoid such defects while the desired final shape is obtained. The design variables of the optimization process consist of the structuralparameters and process parameters. The structural parameters are the initial blank shape, geometry, etc. and the process parameters arethe blank holding force (BHF), the drawbead restraining force (DBRF), etc. In this paper, the two groups of parameters are separatelyoptimized. The structural parameters are optimized by the equivalent static loads method for non linear static response structural optimization(ESLSO) and the process parameters are optimized by the response surface method (RSM). A couple of examples are solved bythe iterative use of ESLSO and RSM, and the solutions are discussed.
이재준,이창훈,Lee. Jae-Joon,Lee. Chang-Hoon 한국방재학회 2005 한국방재학회논문집 Vol.5 No.4
가뭄을 미리 발견하고 감시하는 것은 어려우나, 가뭄지수를 이용하면 가뭄의 파악이 용이하다. PDSI는 통상적으로 가장 널리 이용되나 운영상 제한성을 가지고 있다. 최근 들어 가뭄을 인지하고 감시하는 능력이 향상된 SPI가 개발되었으며, 이는 기존의 지수들에 비해 모든 시간간격에 적용이 가능하고 간단하게 이용이 가능하다. KBDI는 상부토양층의 누적수분부족량을 산출함에 있어서 증발산과 강수량의 순영향을 나타내는 지수로 정의하였다. 본 연구에서는 PDSI, SPI, KBDI를 이용하여 산정된 가뭄지수의 상호비교 연구를 통하여 표준 가뭄지수를 제안하고자 한다. 이를 위하여 우리나라 8개 수계의 30년 이상의 기상자료를 보유한 기상청 강우관측소 자료를 이용하였다. 그 결과 PDSI는 누적되는 강우의 부족으로 가뭄심도를 나타내는 데 유리하고, SPI와 KBDI는 단기간 강우부족을 나타내는데 유리한 것으로 나타났다. Drought is difficult to detect and monitor, but it is easy to interpret through the drought index. The Palmer Drought Severity Index(PDSI), which is most commonly used as one of drought indices, have been widely used, however, the index have limitation as operational tools and triggers for policy responses. Recently, a new index, the Standardized Precipitation Index(SPI), was developed to improve drought detection and monitoring capabilities. The SPI has an improvement over previous indices md has several characteristics including its simplicity and temporal flexibility that allow its application for water resources on all timescales. Keetch-Byram Dought Index(KBDI) was defined as a number representing the net effect of evapotranspiration and precipitation in producing cumulative moisture deficiency in deep duff or upper soil layer. The purpose of this study is to analyze drought in Korea by using PDSI, SPI and KBDI. The result of this study suggests standard drought index by comparing of estimated drought indices. The data are obtained from Korea Meteorological Administration 56 stations over 30 years in each of the 8 sub-basins covering the whole nation. It is found that the PDSI had the advantage to detect the stage of drought resulting from cumulative shortage of rainfall, while SPI and KBDI had the advantage to detect the stage of drought resulting from short-term shortage of rainfall.
이재준 대외경제정책연구원 1998 East Asian Economic Review Vol.2 No.3
Since the outbreak of the Asia exchange rate crisis last year, different analysts have attempted to analyze and explain the reason and the development of the crisis theoretically. But the present theory of the reason of the crisis is not account for the crisis, especially the evident feature that the Asia crisis appear to be infective, which seems to make the world economy to a stagnant degree. This thesis filed the present argumentations which helped to understand the Asia foreign exchange rate crisis and made a discussion at this level. This thesis first explained a certain contact between the secular trend of the capital movement and the appearance of the foreign exchange crisis, then extend to the theoretical explanation of the infective effect of the foreign exchange crisis. Meanwhile, as to the question the predictive possibility which is an important part related to foreign exchange theory, this thesis introduced former thesis which took Korea as the object of analysis.
이재준,송일기 한국서지학회 2009 서지학보 Vol.0 No.33
이 연구는 조선시대에 간행되었던 내사본 가운데 현재 장서각에 수장되어 있는 인본에 대한 판종 및 주제를 분석하는데 목적이 있다. 장서각에 수장되어 있는 내사본은 120건이며, 금속활자본 47건, 목판본 44건, 목활자본 25건, 석인본 2건, 탁본 1건, 필사본 1건으로 조사되었다. 장서각 수장 내사본은 임진왜란 직후인 17세기 초반부터 조선말기인 20세기 초반까지의 인본이 전존하고 있는 것으로 파악되었다. The purpose of this study is to analyze Panjong(kinds of Plate) and subjects of Naesabon, preserved now in Jangseogak. We found that all of those books are 120 titles, include 47 titles printed by metal movable type, 44 titles printed by wood printing blocks, 25 titles printed by wood movable type, 2 lithographs, a rubbing and a manuscript. We also found that those books were published from early 17th century to early 20th century.
우수관거 설계를 위한 계획강우의 임계지속기간 -서울 지역을 중심으로
이재준,이정식,전병호,이종태 한국수자원학회 1993 한국수자원학회논문집 Vol.26 No.2
본 연구는 하수관거 설계시, 계획강우의 임계지속기간을 결정하기 위한 것으로서, 지속기간내의 시간적 강우분포형은 Huff의 4분위법에 의하였으며, 20분~240분의 9개의 지속기간을 10년 빈도강우에 대하여 검토하였다. 본 연구에서는 서울시 관내의 18개 유수지 배수구역을 대상으로 해석을 시도하였으며, 유출해석을 위하여 ILLUDAS 모형을 이용하였다. 하수관거의 설계수문량 기준이 되는 첨두유출량을 최대로 발생시키는 계획강우의 임계지속기간은 대체로 30 A hydrological method is performed to determine the critical duration of design rainfall for the design of storm sewer in Seoul. To seize the effect of the duration and the temporal distribution of the rainfall to the peak discharge of the storm sewer, th