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 : Dae Won Chung (검색결과 1,094 건)
- 무료
- 기관 내 무료
- 유료
-
鄭大源 호남대학교 정보통신연구소 1997 정보통신연구 Vol.6 No.-
본 노문은 산업설비의 자동화 시스템 구축에서 있어 가장 핵심이 되고 중추적인 역할을 하고 있는 공장자동화 통신네트워크인 필드버스에 관한 기초적인 기술개요를 서술하여 전체적인 이해를 돕도록 하였고, 이를 바탕으로 현재 이 분야의 세계적인 기술개발 현황과 기술개발 과제 및 문제점을 검토하여, 경쟁력을 확보하기 위한 기술현안 문제의 방법론을 제시하였다. 그리하여, 현재 우리 나라가 국제 경쟁력으로 확보하고 있는 제어, 컴퓨터 및 통신기술로써 이 분야의 국산화를 촉진시키고 세계시장에 동참할 수 있을 가능성을 제시하였다.
-
Bezier Spline을 이용한 용접 로봇의 새로운 Weaving Motion 궤적 생성 알고리즘
정원지,김대영,서영교,홍형표,홍대선 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.3
In this paper, we propose a new weaving trajectory algorithm for the are welding of a articulated manipulator. The algorithm uses the theory of Bezier spline. We make a comparison between the conventional algorithms using Catmull-Rom curve and the new algorithms using Bezier spline. The proposed algorithm has been evaluated based on the MATLAB environment in order to illustrate its good performance. Through simulations, the proposed algorithm can result in high-speed and flexible weaving trajectory planning so that it s trajectory cannot penetrate into a base metal compared to the conventional algorithm using Catmull-Rom curve.
-
-
정원복,김도훈,정대수,김현경 東亞大學校附設 農業生命科學硏究所 1999 農業生命資援硏究 Vol.8 No.1
水稻의 早期栽培에 따른 品種別 栽植距離와 株當苗數가 生育 및 收量에 미치는 影響과 栽培時期에 따른 米質을 변화를 比較코저 小白벼, 農白벼, 福光벼, 道奉벼, 太白벼, 및 伽倻벼를 公試하여 實施한 試驗結果는 다음과 같다. 株當穎花數는 穎植(27×17cm)며 株當 3苗植인 處理區에서 가장 많았고, 10a當 收量은 密植(27×13cm) 및 株當 5∼7苗植인 處理區에서 가장 많았다. 10a當 收量 및 藁重, 穗數間에 有意的인 正의 相關關係가 認定되었다. 또한 Amylose含量은 普通期栽培보다 早期栽培에서 적게 나타났고, 品種間에는 福光벼가 가장 낮았고, Alkali崩壞度는 普通期栽培보다 早期栽培에서 낮았고, 品種間에는 伽倻벼가 높게 나타났다. A study was presented to analyze rice quality and to number of seedlings per hill and their spacing on growth and yield in various varieties of early planted rice; Sobeag, Nongbeag, Dobong, Taebeag and Gaya. There was a higher number of spikelets in wide spacing than in narrow spacing, and the number from from 3 seedlings per hill was greater than the one from 5 or 7 seedlings per hill. In grain yield per 10 areas, there was a higher yield in narrow spacing than in wide spacing, and the on from the block of the 5 or 7 seedlings per hill was greater than the one from the block of 3 seedlings per hill. There was a significant positive correlation among grain yield per 10 areas, straw weigh and the number of panicles. Amylose contents were lower in early planted rice than in ordinarily planted rice. The Boggawng variety showed lowest amylose contents among the varieties used in this experiment. Alkali digestibility values were lower in early planted rice than in ordinarily planted rice. The Gaya variety showed highest alkali digestibility values among the varieties used in this experiment.
-
효소에 의한 아스트라갈린의 합성에 있어서의 정제 공정에 관한 연구
정대원 水原大學校 2013 論文集 Vol.27 No.-
Astragalin (AS), kaempferol monoglycoside, is classified as a polyphenol, and a minute quantity of AS is known to be present in several plants. Recently, it was reported to be able to prepare AS by the partial hydrolysis of camelliaside A (CamA) and camelliaside B (CamB) contained in tea seed extract (TSE), in the presence of a commercial enzyme complex such as Mash. In this paper, the processes for the recovery of product and the purification of AS were optimized in the enzymatic reaction of CamA and CamB in TSE. Double extractions of reaction mixture with tetrahydrofuran and the following recryatallization from methanol afforded AS with over 97% purity.
-
정대수,이종성,김기영,오주성,정원복,정순재 東亞大學校 大學院 2002 大學院論文集 Vol.27 No.-
In this study, questionnaire were made to environment- friendly producers of rice, lettuce and persimmon regarding farm management methods in low-input production method utilizing organic materials. The average gross revenue of environment-friendly production of rice was about \2,510, and their average yield was 389㎏/10a, which are 22% and 34% lower, respectively, than the conventional rice production case. lettuce was about \3,280/㎏, and their average yield was 4,299㎏/10a, persimmon was about \1,170㎏, and their average yield was 1,645㎏/10z. In order to improve the environment- friendly productions of rice, lettuce and persimmon industry, active cooperation is needed among the producers, govermment ad researchers more than ever. Among other things, production cost reduction and quality improvement with lower chemical residues are part of the urgent matters to be done.
-
우레탄 결합을 통하여 개질된 클레이의 합성에 관한 연구
정대원 수원대학교 산업기술연구소 2004 산업기술연구소논문집 Vol.19 No.-
Commercially available clays were reacted with diisocyanate and followed by hexadecanol to prepare organo-clay (MMT-UR) bonded with long alkyl chain via urethane bond. MMT-UR was characterized by IR, XRD and TGA, and showed larger basal distance compared to any clays reported. However, no further intercalation was observed when MMT-UR was compounded with PP- MA.
-
ε-caprolactam의 음이온 중합에 있어서의 activator 및 수분제거제의 효과
丁大源 水原大學校 1997 論文集 Vol.15 No.-
Anionic polymerization of ε-caprolactam gives high M.W. nylon 6, in the presence of catalyst and activator. In this paper, the polymeric activator was prepared and compared with the monomeric activators. The anionic polymerization of unpurified ε-caprolactam was also carried out in the presence of drying agents. It was possible to prepare nylon 6 from unpurified ε-caprolactam by adding dried-calcium oxide.
-
지용성 β-sitosterol 치환제의 합성 및 콜레스트롤 저하 효과
정대원 수원대학교 산업기술연구소 1998 산업기술연구소논문집 Vol.13 No.-
β-sitosteryl oleate was synthesized by transesterification reaction of β-sitosterol with methyl oleate. Total cholesterol values of male rats fed with high cholesterol diet were significantly decreased by administration of β-sitosteryl oleate. It was possible to dissolve β-sitosteryl oleate in oils by formulation with methyl oleate.
-
鄭大源 호남대학교 산업기술연구소 1998 산업기술연구논문집 Vol.6 No.-
원자력 발전소와 같은 대규모 원전시설에서 안전성확보은 아무리 강조해도 지나치지 않는다. 안전성 확보는 발생 가능성이 있는 사고위험에 대한 철저한 분석과 이에 대비한 완벽한 안전설계 요건의 적용과 관리를 통해서만 가능하며, 모든 원전사업 종사자의 임무이며 동시에 책임이다. 기술적인 사실에 바탕으로한 원자력산업의 올바른 사실의 전달은 안전설계의 중요성에 못지 않음으로써 국가 에너지 자원의 기술자립화와 국가 발전에 큰 영향을 끼친다. 이에 오랫동안 원전설계에 종사해온 경험과 사실에 근거하여 추상적인 공포심이나 불신에서 벗어나 믿고 신뢰하는 원자력의 평화적 이용에 대한 올바른 인식의 계기가 마련되어야 한다. The nuclear safety assurance cannot be much too emphasized in the large nuclear facilities like nuclear power plants. Nuclear safety can beachieved by the thorough analysis against the dangerous accident causes and phenomena and by applying and managing nuclear safety design requirements completely. Thus, it is their duty as well as their responsibilities of all workers involved in the nuclear facilities. The correct communication of true knowledge of nuclear safety based upon the technical facts is much as important as its design assurence, since it affects on the nation's development and the technical self-standing. Accordingly, This paper is prepared to provide an opprotunity of correct understanding and communication on the peaceful use of nuclear facilities to get rid of abstract fear and lack of confidence under the author's experience and viweing the fact that has been involved in this area for a long time.
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
