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깊이별 분리 합성곱을 위한 다중 스레드 오버랩 시스톨릭 어레이
윤종호,이승규,강석형,Jongho Yoon,Seunggyu Lee,Seokhyeong Kang 반도체공학회 2024 반도체공학회 논문지 Vol.2 No.1
깊이별 분리 합성곱 (Depthwise Separable Convolution)을 처리할 때, processing element (PE)의 저활용성은 시스톨릭 어레이 (SA)의 한계점 중 하나이다. 본 연구에서는 깊이별 합성곱의 처리량을 극대화하기 위한 새로운 SA 아키텍처를 제안한다. 더불어, 제안된 SA 는 깊이별 합성곱 계산 중에 유휴 PE 에서 후속 점별 합성곱 (pointwise convolution)을 수행하여 활용도를 증가시킨다. 모든 깊이별 합성곱 연산 후에는 모든 PE 를 활용하여 나머지 점별 합성곱 연산의 속도를 향상시킨다. 결과적으로, 제안된 128×128 SA 는 MobileNetV3 연산 시, 기본 SA 및 RiSA 와 비교하여 속도가 4.05 배, 1.75 배 향상되고, 에너지 소비량을 각각 66.7 %, 25.4 % 감소한다. When processing depthwise separable convolution, low utilization of processing elements (PEs) is one of the challenges of systolic array (SA). In this study, we propose a new SA architecture to maximize throughput in depthwise convolution. Moreover, the proposed SA performs subsequent pointwise convolution on the idle PEs during depthwise convolution computation to increase the utilization. After the computation, we utilize unused PEs to boost the remaining pointwise convolution. Consequently, the proposed 128x128 SA achieves a 4.05x and 1.75x speed improvement and reduces the energy consumption by 66.7 % and 25.4 %, respectively, compared to the basic SA and RiSA in MobileNetV3.
후면 환기조건에 따른 건물외피용 태양광발전(BIPV)모듈의 열적 영향에 관한 실험연구
윤종호(Yoon Jongho),김재웅(Kim Jae-Ung) 한국태양에너지학회 2006 한국태양에너지학회 논문집 Vol.26 No.1
Building integrated photovoltaic(BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. On the other hands, lots of architectural considerations should be reflected such as installation position, shading, temperature effect and so on. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated. This study is on the combined thermal and PV performance evaluation of BIPV modules. The purpose of this study is to investigate a temperature effect of PV module depending on the ventilation type of PV module backside. Test cell experiment was performed to identify the thermal and power effect of PV modules. Measurement results on the correlation of temperature and power generation were obtained. Those results can be utilized for the development of optimal BIPV installation details in the very early design stage.
윤종호(Jongho Yoon),황경충(Kyungchoong Hwang),김종배(Jongbae Kim) 한국자동차공학회 2003 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Aluminum alloys have been used as the part materials of aerospace and automobile industry because they have high specific strength. The light weight of them are attractive because it makes the energy savings. They are light, but they have high strength, excellent corrosion resistance, and good machinability.<br/> In this study, a series of creep tests for the 3-element aluminum alloy under the 16 temperature & stress conditions have been performed. Its' life prediction constant of Larson-Miller parameter is calculated as about 5 and the ductile fracture was primarily observed by intergranular fracture.<br/>
동절기 음영면적비를 이용한 공동주택 배치유형별, 세대별, 방위별 일조환경 평가 연구
윤종호(Yoon Jongho),여승기(Yeo Seung-Ki),박재성(Park Jason),최율(Choi Yool),이시웅(Lee Si-Woong) 한국태양에너지학회 2006 한국태양에너지학회 학술대회논문집 Vol.- No.-
This study is to investigate the possibility of a quantitative analysis on sunshine right in apartment houses with a new evaluation index of shading area ratio(SAR) which represents seasonal average value of shaded portion of a window during definite period. SAR values of each apartment houses in a prototype building was calculated depending on apartment building arrangement types and orientations.<br/> Since the new method proposed in this research is able to measure the sunshine possibility of the each house in detail, which is more precise and descriptive than the existing method of sunshine judgment standard based on the sunshine hours only at winter solstice, it can be appropriately utilized as a highly qualified sunshine right judgment measures in apartment buildings.