http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
STS 316L의 열간 정하중 변형 거동에 미치는 결정립 크기의 영향
노연호,임병수 成均館大學校 科學技術硏究所 2000 論文集 Vol.51 No.1
The effect of grain size on the high temperature static tensile deformation behavior of STS 316L was investigated. Specimens with grain size of 30, 65 and 125㎛ were prepared through various heat treatments and the relationship between grain size and the changes in the fractional portion of three deformation stages was investigated. Fractal surface observation by SEM suggested that there might have been the specific role of grain sizes and some effect of cavities on rupture life. It was shown that the fracture mode of 316L changed from transgranular to intergranular with increasing grain size.
DEA-SBM 모형을 활용한 국내외 물류기업의 재무 효율성 분석
노연호,판황프엉우엔,하헌구 한국로지스틱스학회 2023 로지스틱스연구 Vol.31 No.6
The domestic logistics industry has a low level of operational efficiency and management maturity compared to global logistics companies, and it is necessary to specialize and systematize key operations to drive business expansion and growth. Therefore, this study divided the domestic logistics companies into 4 groups by sector and 3 groups by size, and added global logistics companies to analyze efficiency using the DEA-SBM (Slack Based Model) based on meaningful and objective indicators from financial statements. The efficiency analysis of all 58 logistics companies from 2013 to 2022 showed an upward trend for domestic comprehensive logistics service companies and trucking companies, a flat trend for freight forwarding companies, and a downward trend for warehousing companies. Overall, domestic logistics companies have not reached an adequate level of efficiency in terms of outputs relative to inputs. On the other hand, the relative efficiency of global logistics companies shows a stable trend, but the overall distribution of inefficiencies is much lower than that of domestic logistics companies, indicating that they are operating efficiently. Through this study, Korean logistics companies have identified the need for more active policy support from the government along with their own efforts to improve competitiveness and structural reforms. In addition, both domestic and foreign logistics companies have experienced fluctuations in efficiency before and after the COVID-19 outbreak, however, it is necessary to benchmark domestic logistics companies against the low efficiency fluctuations and rapid improvement results of global logistics companies through digital transformation, logistics system improvement using A.I. and Big Data, and Logistics & Supply Chain improvement processes such as customer contact response management.
[재료] 결정립 크기에 따른 STS 316L강의 크리프 거동에 관한 연구
노연호(Younho Rho),임병수(Byeongsoo Lim) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1999 No.11_2
The effect of grain size on the creep behavior of low carbon type 316L austenitic stainless steel was investigated. Specimens with grain size of 30. 60 and 125㎛ were prepared through various heat treatments and they were employed in the investigation of the relationship between the grain size and the change of fractional portion of three creep stages.<br/> SEM studies on deformed specimens showed the different roles of grain boundaries in different specimens and the effect of cavities on rupture life of each specimen. The fracture mode of 316L changed from transgranular to intergranular with increasing grain size.<br/>