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PDP용 반파 공진형 멀티출력 하프브리지 컨버터의 다중 공진특성에 관한 연구
李在三(Jae-In Lee),孫虎仁(Ho-In Son) 대한전기학회 2006 전기학회논문지 B Vol.55 No.6
In recent years, having the advantages of being small, low in cost and high in efficiency, Half-wave resonant type, (having only one output diode), is used in ZVS Half-Bridge DC/DC converter. This paper presents the operation mode by multi-resonant factors in the Half-wave type multi-resonant converter with direct Buck chopper circuit operated in discontinuous current mode. To study the characteristics of a multi -resonant operation in steady-state, the characteristic impedances in each mode and safe operation-region(S.O.R) are reported. Computer simulation and experimental data are also given to verify the theoretical results.
골재의 신속한 품질평가를 위한 AI 학습용 데이터 구축에 관한 연구
민태범 ( Min Tae-beom ),김인 ( Kim In ),이재삼 ( Lee Jae-sam ),백철승 ( Baek Chul-seoung ) 한국건축시공학회 2023 한국건축시공학회 학술발표대회 논문집 Vol.23 No.2
In this study, the accuracy of the assembly rate of fine aggregate and the cleavage rate of coarse aggregate was analyzed using the constructed learning data. As a result, it was possible to predict the distribution of assembly rate for fine aggregate through a simple sample collection image, showing an accuracy of 96%. The classification of the aggregates could be confirmed by analyzing the fracture shape of the gravel, showing an accuracy of 97%.
에코인공 경량콘크리트를 사용한 플랫플레이트 슬래브-기둥 접합부의 뚫림전단 성능평가
정인희(Jung In-Hee),이진우(Lee Jin Woo),이재삼(Lee Jae Sam),강영웅(Kang Young-Woong),양원직(Yang Won-Jik),이원호(Lee Waon-Ho) 대한건축학회 2007 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.27 No.1
Structures on flat plate slab using Eco lightweight concrete have economic advantages like to reduce costs by reducing the dead load of structure. Flat plate slab is very useful structural system. However flat plate have character of brittle failure in slab-column connections. So these objectives of study are to examine that variables have influence on the punching shear of flat plate slab-column connections using Eco lightweight concrete. In general, punching shear of flat plate is depending on the compressive strength of concrete, effective depth of slab and perimeter of critical section. In the test, specimens with variables were tested to investigate punching shear behavior and determine their punching shear capacity.