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수냉쿨러의 냉각 효율 향상을 위한 플레이트 부품의 형상에 관한 연구
성윤호,김형찬,김선민,윤석영,이영웅,이상욱 순천향대학교 부설 산업기술연구소 2021 순천향 산업기술연구소논문집 Vol.27 No.2
This study investigates changes in cooling efficiency for heat sink plate width, perforated width, and chamfer angle as part of a parameter study to maximize cooling efficiency of heat sink by setting various variables on plates. The width of the plate is set to 16, 20, 24, 28 mm, perforated width 1.5, 2.0, 2.5 mm, chamfer angles 5, 10, 15 and 20°. By conducting a computational study with Ansys Fluent, the sink plate with plate width of 16mm, perforated width of 3mm and chamfer angle of 10° is shown to be the best cooling efficiency.
신영수,연규석,최종윤 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-
본 연구에서는 중심부를 MMA 개질 폴리머 모르타르로 하고 양표면부를 고인장, 고내구성인 GFRP (Glass Fiber Reinforced Plastics)로 보강하여 샌드위치를 제작하고, 이에 대한 단순 휨시험을 실시하여 GFRP 보강 MMA 개질 폴리머 모르타르 샌드위치패널의 단면결정시 필요한 설계 휨 모멘트의 산정을 위한 기초적인 자료로 제공코저 한다. 그 결과 중심부 MMA개질 폴리머 모르타르의 두께에 관계없이 압축 및 인장 GFRP 보강층 두께가 0에서 1.50∼2.76mm로 증가함에 따라 휨강도는 2.3∼5.6, 변형에너지는 40∼70배 보강효과를 나타내었다. 이것은 얇은 두께를 갖는 휨부재의 보강에 철근 또는 메쉬를 사용하는 것 보다 양표면부를 GFRP로 보강하는 것이 현저한 보강효과가 있음을 보여주는 결과이다. In this study, a MMA modified polymer mortar sandwich panels was developed : Core was made of the MMA polymer modified mortar, compressive strength of which was about 1020 kgf/㎠, and both facing were made of the glass fiber reinforced plastics (GFRP). The result showed that the strain energies increased 23-33 times as the thicknesses of facings increased from 1.50 to 2.76mm with fixing the core thickness to constants (30-50 mm). On the other hand, these values showed a tendency of decreases as the core thickness increases regardless of thickness of facings. A set of basic data for the structural analysis could be provided by investigating the correlations, within the scope of this research, between the resisting moment and the thicknesses of core and facing.
김희상(Heesang Kim),임현승(Hyeonseung Im),문양세(Yang-Sae Moon) 대한전기학회 2022 전기학회논문지 Vol.71 No.1
Recently, advanced metering infrastructure (AMI) has been deployed for power demand distribution and energy saving, and correspondingly traditional watt-hour meters installed in apartments and industrial sites are also being replaced with AMIs. Accordingly, power demand prediction using AMIs will become increasingly important to save electrical energy consumption. In this paper, we develop various deep learning-based electricity consumption prediction models using simple neural networks, convolutional neural networks, recurrent neural networks, and encoder-decoder-based generative models. To build prediction models, we use average power demand data collected from various home smart meters. Experimental results show that the generative model outperforms other deep learning-based models in terms of mean squared error, and we roughly explain why the generative model is better than other models by examining the activation layer output distributions.
( Yun Hong Cheon ),( Won Seok Lee ),( Eung Yeong Lee ),( Myung Soon Sung ),( Myoung Joo Hong ),( Wan Hee Yoo ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Statins, Hydroxymethylglutaryl-coenzyme inhibitor, have been reported to have anti-infiammatory and/or immunomodulatory effects and prophylactic and therapeutic effects in collagen-induced arthritis, an experimental model of rheumatoid arthritis (RA). IL-1ß and thapsigargin (TG)-induced endoplasmic reticulum (ER) stress modulate the receptor activator of nuclear factor kappa-B ligand (RANKL)-mediated osteoclastogenesis. This study was investigated to defi ne the effects of atorvastatin on IL-1ß and ER stress-induced, RANKL-mediated osteoclastogenesis and its mechanisms. Methods: Bone marrow cells (BMCs) were obtained from 5-week-old male ICR mice and cultured to be differentiated into osteoclasts with M-CSF and RANKL in the presence or absence of IL-1ß, TG, or atorvastatin. The formation of osteoclasts was evaluated by tartrate-resistant acid phosphatase (TRAP) staining and resorption pit assay with dentine slice. The molecular mechanisms of the above effects of atorvastatin on osteoclastogenesis were investigated by using RT-PCR and immunoblotting for osteoclast specifi c and ER stress signaling molecules, including PERK, IRE1, GRP78, eIF2a, c-Fos and NFATc1. Results: IL-1ß and TG-induced ER stress increased the formation of osteoclasts by up-regulating the osteoclast specifi c signals (c-Fos, NFATc1) and ER stress-associated signaling pathways (PERK, IRE1, GRP78, and eIF2a). Atorvastatin signifi cantly inhibited IL-1ß and ER stress-induced, RANKL-mediated osteoclastogenesis by down-regulating above signal pathways, dose-dependently. Conclusions: Atorvastatin inhibited IL-1 and ER stress-induced, RANKL-mediated osteoclastogenesis by inhibiting intracellular signaling pathways, including PERK, IRE1, GRP78, c-Fos and NFATc1. These results suggest that atorvastatin might have disease modifying effects by inhibition of infi ammation and ER stress-induced osteoclastogenesis in the infi ammatory joint diseases, such as RA.
A New Soybean Cultivar with Large Seed for Fermented Soyfood and Tofu "Jangwon"
Yeong Ho Lee,Keum Yong Park,Seok Dong Kim,Hong Tae Yun,Jung Kyung Moon,Ja Hwan Ku,Yul Ho Kim,Yong Ho Kim,Moo Nam Chung 한국육종학회 2003 한국육종학회지 Vol.35 No.4
A new soybean variety “Jangwon” was released by the National Crop Experiment Station, RDA, in 2000. This variety was derived from the crossing between Pokwangkong and SS84040, the elite breeding line with large seed, in the summer season, 1989. The breedi