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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.
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.
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.
에너지자립형 태양열 주택의 설계 및 시공 방법 체크리스트 수립 연구
윤종호(Yoon, Jongho),백남춘(Baek, Namchoon),유창균(Yu, Changkyun),김종일(Kim, Jongil) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Most of solar system dissemination has been focused on domestic hot water system of which utilization to a building is relatively simple and safe than solar heating system. Through the survey on a cause of solar house dissemination failure in Korea, we conclude that design integration and systematic approach method for technology application are the most important element for a successful solar house. KIER(Korea Institute of Energy Research) and Hanbat National University have started new project on a development of Zero energy Solar House, called ZeSH which can be sustained just by natural energy without the support of existing fossil fuel. This is the 1st phase research of 10 years long-term ZeSH plan which develops a low-cost and 100% self sufficient ZeSH. The goal of 1st phase ZeSH research is to get a 70% self sufficiency only in thermal loads. Actual demonstration house, named KIER ZeSH I was designed and constructed as a result of 1st phase research work in the end of 2002. Various innovative technologies such as super insulation, high performance window, passive and active solar systems, ventilation heat recovery system are applied and evaluated to the KIER ZeSH I. A lot of computer simulations had been conducted for the optimal design and system integration in every design steps. Considering all the results from detailed hourly computer simulation, it is expected that at least 70% self-sufficiency in thermal loads which is 1st phase target value can be excessively achieved in actual demonstration house. Besides, many valuable findings from the design and analysis to construction could be established such as collaboration method among the participants, practical design and construction techniques for system integration and the others. The purpose of this paper is to introduce the main findings through the development of KIER ZeSH I project. Practical guidelines in every design step for new low- or zero- energy solar house is proposed as result.
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/>