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한미란(Mi-ran Han),김세호(Se-ho Kim),이승인(Seung-in Lee),조광희(Kwang-Hee Cho),김근희(Keun-Heui Kim),김종배(Jong-Bae Kim) 한국IT서비스학회 2019 한국IT서비스학회 학술대회 논문집 Vol.2019 No.2
손글씨를 인식하기 위하여 여러 방면의 노력들이 존재하여왔다. 손글씨를 인식하기 위한 예로는 일어 영어 숫자 등등 다양한 방면의 논문들이 존재하고 있다. 다만 어린아이들과 같은 경우는 인식에 대한 어려움이 존재하기에 이러한 것을 극복하기 위하여 우리는 Deep learning 기술을 사용하였다 사용한 기술은 SLR, ANN, CNN 총 3가지 기법을 사용하여 정확도를 측정하였고 그 결과 SLR은 91% 두 개의 층을 더 넣어준 것은 93% CNN은 95%로 가장 높은 성능을 보였다.
김규만(G. M. Kim),정성일(S. I. Chung),오현석(H.S. Oh) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
FIB (Focused Ion Beam) milling on a 500-㎚-thick silicon nitride membrane was studied in order to fabricate a highresolution shadow mask, or called a nanostencil. The silicon nitride membrane was fabricated by MEMS processes of LPCVD, photolithography, ICP etching and bulk silicon etching. The apertures made by FIB milling and normal photolithography were compared. The square metal pattern deposited through FIB milled shadow mask showed 6 times smaller corner radius than the case of photolithography. The results show high resolution patterning could be achieved by local deposition through FIB milled shadow-mask.
김규만(G. M. Kim),정성일(S.I. Chung),오현석(H.S. Oh) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Fabrication of a high-resolution shadow mask, or called nanostencil, is presented. This high-resolution shadowmask is fabricated by a combination of MEMS processes and focused ion beam (FIB) milling. 500 ㎚ thick and 2x2 mm large membranes are made on a silicon wafer by micro-fabrication processes of LPCVD, photolithography, ICP etching and bulk silicon etching. Subsequent FIB milling enabled local membrane thinning and aperture making into the thinned silicon nitride membrane. Due to high resolution of FIB milling process, nanoscale apertures down to 70 ㎚ could be made into the membrane.
정성일,박종일,김경훈 경희대학교 환경연구소 1997 環境硏究 論文集 Vol.7 No.-
The purpose of this study is to investigate effect of relative humidity for Indoor thermal comfort and physiolosical change. And this study examined high or low relative humidity was associated with a high persentage of uncomfortable subjects during summer season. Also we examined heat balance equation, thermal exchange with environments and thermo-regulatory control mechanisms of human body. As a result of this research, we are participating the establishment of domestic estimation standard for indoor environments, people' health and better welfare could be supported by this study.
김경훈,박종일,홍희기,고경태,정성일 慶熙大學校 레이저 工學硏究所 1997 레이저공학 Vol.8 No.-
The purpose of this study was to determine thermal sensation and physiological responses for men in summer indoor environment, under various air temperature and relative humidity, with male university students. Subjective Evaluation, Heart Rate(Electrocardiogram), Electroencephalogram(EEG) were examined. We found that comfort of people was achieved at SET?? 24.7℃, -0.82<PMV<0.93 and the difference of skin temperature was found at the calf area as air temperature changes. At low air temperature, heart rate was decreased and high temperature, heart rate was increased but there was no change at EEG, keeping α-wave.
Gelatin Sponge를 이용한 미세혈관 문합술에 대한 실험적 연구
김한중,윤진호,이동진,안덕선,정성일 大韓成形外科學會 1994 Archives of Plastic Surgery Vol.21 No.1
On the whole, end to end anastomosis using simple interrupted suturing has been useful method for microvascular anastomosis. This involves numerous(usually 8 or more) sutures which cause vessel wall injury and vessel thrombosis. In an effort to overcome these problems, there has been studies of different type of anastomosis to overcome these problem, there has been studies of different type of anastomosis to decrease the number of suture site. As one of such studies, we performed anastomosis with decreasing suture coated with gelatin cuff on femoral artery in the rat. In 80 cases of rat, 8 simple interrupted suture was done in 40 cases of rats(control Group), and 3 suture with gelatin cuff was done in the rest 40 rats(experimental group), We compared the experimental group with the control group about patency rate, operating time, bleeding time, infection and histologic finding. The results are as follows. 1. The patency rate was 92.5% in experimental group and 93.8% in control group. 2. The average operating time was 9.2 ± 4.Omin. in experimental group and 17.5 ±7.1 min. in control group. 3. The average bleeding time was 87.5 sec. in experimental group and 139.5 sec. in control group. 4. The infection rate was not different significantly. 5. In histologic finding, reendothelialization began after 1wk in both group and completed in 3 wks. 6. The endothelial damage was less in experimental group than in control group.