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- 저자 : 김준범(JunBum Kim) (검색결과 5 건)
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김준범(JunBum Kim),홍성우(Seong-Woo Hong),이승재(SeungJae Lee) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.11
SMT 방식이 적용된 PCB에서는 패턴매칭, 객체 검출과 같은 방법으로 불량 검출을 했다. FPCB의 경우 PCB와 다르게 유연한 성질을 가지고 있어 기존의 방식을 사용할 경우 불량을 검출하는 것이 매우 어렵다. 이러한 이유로 자동화 대신 사람이 직접 검사를 하고 있어 낮은 생산성을 가지고 있고, 높은 비용을 필요로 한다. 본 논문에서는 위 문제들을 해결하기 위해 딥러닝을 이용한 해결책을 제시한다. 우리는 산업현장에서 요구하는 조건에 맞는 서로 다른 3가지 딥러닝 모델(U-Net, Siamese Neural Networks, AnoGAN))을 사용하여 실험을 진행하였고 각각의 결과에 대해 논의하고자 한다. On PCB, which is using SMT process, use such as pattern matching and object detection for defect inspection. In the case of FPCB, unlike PCB, it is hard to use the old ways. In addition, the current defect inspection cannot be automated, it has a low productivity and requires a high cost because a person directly inspects it. On this paper, we propose solution to solve these problems by using deep learning. We experiment 3 different model(U-Net, Siamese Neural Networks, AnoGAN), which is fit on request of industrial site, and discuss about the result.
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국승규(Kook, Seungkyu),김준범(Kim, Junbum) 한국방재학회 2021 한국방재학회논문집 Vol.21 No.1
일반교량 내진설계의 목적은 붕괴방지수준을 확보하는 것이며 결정적인 구조부재는 교각기둥이다. 붕괴방지수준을 확보하기 위해서는 교각기둥의 지진거동에 의거하여 연성/취성 메카니즘을 구성하여야 하며 이는 교각기둥의 휨/전단 성능곡선에 기반하여야 한다. 이 연구에서는 일반교량의 원형 RC 교각기둥을 대상으로 높이, 직경 및 횡철근비의 설계인자가 휨/전단성능곡선에 미치는 영향을 파악하고 성능곡선을 중첩하여 지진거동을 분석하였다. 분석결과로부터 연성메카니즘 구성에 필요한 조건을 제시하였다. The purpose of earthquake-resistant design for typical bridges is to secure no-collapse requirements, and pier columns are essential structural members. To secure no-collapse requirements, a ductile/brittle mechanism should be designed according to the seismic behaviors of pier columns. These formations should be based on the flexure/shear performance curves of pier columns. In this study on the circular reinforced concrete pier columns of typical bridges, the effects of design factors such as height, diameter, and transverse reinforcement ratio on the flexure/shear performance curves are determined. The seismic behaviors of the pier columns are analyzed by overlapping the performance curves. Conditions are proposed for ductile mechanism formation based on the study results.
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최적화 기법과 분산 컴퓨팅을 이용한 재료 성형공정의 역문제 에 관한 연구
최주호(JooHo Choi),오동길(DongGil Oh),하덕식(DukSik Ha),김준범(JunBum Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.5
In this paper, an inverse problem of glass forming process is studied to determine a number of unknown<br/> heat transfer coefficients which are imposed as boundary conditions. An analysis program for transient heat<br/> conduction of axi-symmetric dimension is developed to simulate the forming and cooling process. The<br/> analysis is repeated until it attains periodic state, which requires at least 30 cycles of iteration. Measurements<br/> are made for the temperatures at several available time and positions of glass and moulds in operation. Heat<br/> removal by the cooling water from the plunger is also recorded. An optimization problem is formulated to<br/> determine heat transfer coefficients which minimize the difference between the measured data and analysis<br/> results. Significant time savings are achieved in finite difference based sensitivity computation during the<br/> optimization by employing distributed computing technique. The analysis results by the optimum heat transfer<br/> coefficients are found to agree well with the measured data.
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CAD와 유한요소해석을 연계한 금형 냉각문제의 설계최적화에 관한 연구
오동길,류동화,최주호,김준범,하덕식 한국 항공대학교 항공산업기술연구소 2001 航空宇宙産業技術硏究所 硏究誌 Vol.11 No.-
In mechanical design, optimization procedures have mostly been implemented solely by the CAE codes combined by optimization routine, in which the model is built analyzed and optimized. In case of complex geometries, however, CAD is indispensable tool for the efficient and accurate modeling. This paper presents a method to carry out optimization, in which CAD and CAE are used for modeling and analysis respectively and integrated in an optimization routine. Application Programming Interface(API) function is exploited to automate CAD modeling, which enables direct access to CAD. The advantage of this method is that the user can create very complex object in parametric and automated way, which is impossible in CAE codes. Unigraphics and ANSYS are adopted as CAD and CAE tools. In ANSYS, automated analysis is done using codes made by a script language, APDL(Ansys Parametric Design Language). Optimization is conducted by VisualDOC and IDESIGN respectively. As an illustrative example, a mold design problem is studied, which is to minimize temperature deviation over a diagonal line of the surface of the mold in contact with hot glass.
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