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김철호(C. H. Kim),최세호(S. H. Choi),주원종(W. J. Joo),김기범(K.B. Kim) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
This paper proposes a new steel strip surface inspection system. The system acquires bright and dark field images of defects by using a stroboscopic IR LED light and area camera system and the defect images are preprocessed and segmented in real time for feature extraction. 4113 defect samples of cold roll steel strips are used to develop KNN (k-Nearest Neighbor) classifier which classifies the defects into 8 different types. The developed KNN classifier demonstrates about 85% classifying performance which is considered very plausible result.
김기범,홍성출,김민호,정경락,이삼철,Kim K.B.,Hong S C.,Kim M.H.,Jheong G.R.,Lee S.C. 대한의용생체공학회 2000 의공학회지 Vol.21 No.3
본 연구에서는 새롭게 설계한 인공폐 모듈을 사용하여 인공폐의 효율을 평가하기 위한 압력손실과 산소전달에 대한 실험을 수행하였다. 또한 증류수, 아황산나트륨용액을 혈액대용물질로 사용하여 다른 인공폐의 성능을 평가하였다. 혈액대용물질은 압력손실과 산소운반력을 연구하는데 전혈(whole blood)에 비해 장점이 많다 즉. 이들은 상대적으로 값이 저렴하고 조절하여야 할 변수가 적다. 또한 이 용액을 사용하게 되면 탈산화장치가 필요 없으며 실험결과의 분석이 상대적으로 쉽다. 전혈과 같은 산소분압을 갖는 아황산나트륨용액을 사용하는 경우 아황산나트륨 용액의 산소전달속도는 전혈을 사용하는 경우의 산소전달속도와 거의 일치하였다. 이 실험에서 중공사모듈의 산소전달속도를 측정하는데 아황산나트륨용액이 혈액대용물질로 이용될 수 있음을 보였다. 이 인공폐 모듈에서는 용액이 중공사의 바깥쪽으로 흐르도록 설계하였는데 이 실험용 인공폐는 압력손실이 안쪽으로 흐르도록 하는 흐름에 비해 $1/3\~1/6$였다. In this paper a newly designed oxygenator module was used to perform the experiments for pressure drop and oxygen transport in order to evaluate the efficiency of the artificial lung. Also, distilled water. sodium sulfite solutions used in this experiment were evaluated for the performance of other artificial lungs. Substituted bloods have many advantages over whole blood in studying pressure drop and oxygen uptake. They are relatively inexpensive, and require fewer variables to be controlled. Furthermore, deoxygenation is not necessary when those solutions are used. In addition to these advantages. assays and interpretation of the experimental results are relatively easy. In the case of using the sodium sulfite solution having the same oxygen partial pressure as whole blood. the oxygen transfer rate of the sodium sulfite solution was basically same as that of whole blood. It was concluded in evaluating the function of artificial lungs that the sodium sulfite solution was suited for measuring oxygen transfer rate. In our module, artificial blood was flowed into the outside of hollow fiber membrane. The artificial lung created in this experiment showed that pressure drop was reduced to $1/3\~1/6$ of that compared to the inside-flow case.
건물 일체화 태양광발전시스템의 입사각에 따른 발전효율에 관한 연구
김기범(K.B.Kim),이강연(K.Y.Lee),박정민(J.M.Park),박진형(J.H.Park),백형래(H.L.Baek),조금배(G.B.Cho) 전력전자학회 2002 전력전자학술대회 논문집 Vol.- No.-
This paper presents a utility interactive photovoltaic generation system with the angle of inclination and direction.<br/> This paper summarizes the results of these efforts by offering a snapshot of the configuration of photovoltaic in residential applications. The status of PV system components and inter-connection and safety equipment will be summarized. also, This System is able to variation the angle of inclination and direction. Hence this paper discuss only results that might be useful for generation power.
MR fluid jet polishing system의 비구면 렌즈 금형 코어 연마를 위한 경로
김기범(K. B. Kim),조명우(M. W. Cho),하석재(S. J. Ha),조용규(Y. K. Cho),이정원(J. W. Lee) 한국소성가공학회 2015 금형가공 심포지엄 Vol.2015 No.8
MR fluid can be changed viscosity through magnetic flied and that characteristic reduce scattering of jetting fluid. From this reason MR fluid jet polishing system can carry out ultra-precision polishing. In this paper we calculate path considering aspherical lens profile equation and experimental conditions of MR fluid jet polishing system. And then we polished aspherical lens mold core using MR fluid jet polishing system through path control and compare results before and after polishing process.