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M. Haitham SHAMMAA,Hiromasa SUZUKI,Yutaka OHTAKE (사)한국CDE학회 2010 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
In this work, we introduce a method named creeping contours for image segmentation into component parts for the purpose of extracting the boundary surfaces of these parts. Creeping contours are contours that expand following a speed function defined by the gradient and curvature at contour points, starting from an initial contour position defined either manually or automatically. Contours in the image creep simultaneously at different speeds while labels are assigned to contour pixels by the defined creeping condition. We also demonstrate the effectiveness of the proposed method by segmenting 2D grayscale images and 3D volumetric CT images of mechanical parts into multiple segments and generating the boundary surfaces of these parts.
Development of Large-capacity SVC Using Self-protective Light-triggered Thyristor
A. Ohtake,T. Fujimoto,M. Imura,K. Kondo 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
A static var compensator (SVC) was developed using a light-triggered thyristor with an overvoltage self-protection function. In order to reduce the installation space for the equipment, we adopted a multiple valve unit (MVU) structure. This paper introduces the thyristor valve developed for a large-capacity SVC and some results of factory tests and experiences from operation in the field. The advantages of the proposed SVC are described in comparison with the conventional one.