http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 이승규 (검색결과 1,745 건)
- 무료
- 기관 내 무료
- 유료
-
LS-DYNA를 이용한 원자력발전소의 로드블록에 대한 차량 충돌 시뮬레이션
이승규,김동욱,이필승,SeungGyu Lee,Dongwook Kim,Phill-Seung Lee 한국전산구조공학회 2023 전산구조공학 Vol.36 No.2
This paper introduces a simulation method for the collision between roadblocks and vehicles using LS-DYNA. The need to evaluate the performance of anti-ram barriers to prepare for vehicle impact has increased since vehicle impact threats have been included as a design criterion for nuclear power plants. Anti-ram barriers are typically certified for their performance through collision experiments. However, because Koreas has no performance testing facilities for anti-ram barriers, their performance can only be verified through simulations. LS-DYNA is a specialized program for collision simulation. Various organizations, including NCAC, distributes numerical models that have been validated for their accuracy with collision tests. In this study, we constructed a finite element model of the most critical vehicle barrier module and simulated collision between roadblocks and vehicles. The calculated results were verified by applying the validation criteria for vehicle safety facility collision simulations of NCHRP 179.
-
-
팽나무 뒷면흰가루병을 일으키는 병원균 Pleochaeta shiraiana의 존재 확인
이승규,신현동,이상현,조성은,박지현 한국식물병리학회 2011 식물병연구 Vol.17 No.3
The presence of Pleochaeta shiraiana associated with powdery mildew of Celtis sinensis in Korea is dubious,mainly due to incomplete records of earlier workers. To confirm the occurrence of the powdery mildew and the identity of the causal fungus, morphological characteristics of the anamorph and teleomorph from nine samples deposited in KUS (Herbarium in Korea University) were examined by light microscopy. Identification of the fungus was supported by comparing four ITS sequences from Korean samples with two Japanese data. This is the first confirmed report of the powdery mildew associated with P. shiraiana in Korea. 지금까지 우리나라에서 팽나무 뒷면흰가루병 및 병원균 Pleochaeta shiraiana의 존재에 대하여 확실하게 알려지지 않았으므로 이를 확인하기 위하여 고려대학교 표본실에 보존된 9개 시료를 대상으로 병원균의 무성세대와 유성세대의 형태적 특징을 현미경으로 관찰하고 기록하였다. 또한 4개 시료에서 획득한 ITS 염기서열을 일본의 2개 시료에서 알려진 자료와 비교하여 99% 이상의 상동성을 확인하였다. 이로써 P. shiraiana에 의한 뒷면흰가루병이 우리나라에서 발생함을 확인할 수 있었다.
-
-
급동형태(扱胴形態)와 작물(作物)의 수분함량(水分含量)이 맥주보리의 탈곡성능(??性能)에 미치는 영향(影響)
이승규,김성태,민영봉,Lee, Seung Kyu,Kim, Sung Tae,Min, Young Bong 한국농업기계학회 1983 바이오시스템공학 Vol.7 No.2
The purpose of this experiment was to evaluate the effect of the drum structures and crop moisture contents on the performance of newly developed throw-in type axial thersher. Sachun No.2 malting barley with four different crop moisture levels was used as the testing material. Four different types of threshing drum; the cylindrical drum-equipped with teeth or rubber bars and the conical drum-equipped with teeth or rubber bars were tested. The results are summarized as follows; 1. The threshing efficiency of cylindrical drum was higher than that of the conical one, and the drum with teeth was more effective in threshing than the one with bars. However, the higher the threshing efficiency over the whole range of moisture levels and drum speeds given, the more the rapid and unexpectable variations in threshing efficiencies 2. The separation efficiency of the conical drum was decreased as drum speed was increased and was not so much influenced as crop moisture content. But in case of the cylindrical drum, the result was shown in opposite way to that of the conical one. The separation efficiency of the drum with teeth was higher than that of the drum with bars and no significant decrease in separating efficiency was found at wet crop condition. 3. Foreign matters other than grain passing through the concave sieve was decreased as crop moisture content was increased, and the purity was increased at middle range of drum speed regardless of drum types. 4. Minimum grain loss was found at 700 rpm to 800 rpm of drum speed for all types of drums. The effect of crop moisture content on total grain loss was varied with drum types. As far as the grain loss is concerned, the conical drum having teeth was not so greatly influenced by various crop moisture contents and drum speeds as compared with the other types of drum. 5. Generally, the crop moisture content has more relevant effect on the germination than the drum speed regardless of drum types. The germination percentage of grain threshed by the conical drum and the bar attached drum were higher than those of cylindrical one and teeth attached one, respectively.
-
원추형(圓錐型) 탈곡기(??機)에 관(關)한 연구(硏究)
이승규,Lee, Seung Kyu 한국농업기계학회 1981 바이오시스템공학 Vol.6 No.1
The major limiting factor on the determination of combine capacity is the frequent occurence of clogging over the some parts of machine when the crop is wet in the case of Japanese self-feeding type combine. And in the case of American conventional combine having big separating parts, the great grain loss and damage occur when the machine is used for rice harvesting. This experiment was carried out to develop the new type threshing and separating equipment. Proto-type thresher which consist of a conical threshing drum and a conical separating sieve rotating around the threshing cone was constructed and tested. In the case of 800 rpm of threshing cone speed, average threshing loss was below 1 percent, separating loss was about 1 percent, grain damage was about 0.4 percent, and average total power required was about 2.6 PS. This design has some problems such as higher power required or wrapping problems under the conditions of feeding long damp straw. But, compared with the conventional combine or thresher, this machine certainly has some potentials for this approach to combine development. The crop feed rate must be increased through improvement of the feeding portion of the threshing cone. And it is required to investigate further about some parameters causing wrapping phenomena.
-
-
이승규,신정우,김태욱,김성찬,정상준 한국항공우주학회 2012 한국항공우주학회 학술발표회 논문집 Vol.2012 No.11
항공용 부품은 그 역할에 따라 각 종 시험을 통해 요구성능을 만족하는지 검토되어야 할 뿐만 아니라, 환경시험을 통해 예상되는 운용환경에서의 정상 작동 여부를 확인해야 한다. 본 논문에서는 항공기 부품 중 착륙장치의 환경시험을 소개한다. Aircraft components should be verified with a few of qualification tests. In addition, an environment test should be performed to examine an unintended behavior of the components in an expected environment. In this paper, environment tests of landing gear are introduced.
-
-
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
