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曹翠珍(Cao Cuizhen),王俊新(Wang Junxin) 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.9
The scientific and reasonable network is the basis for the emergency logistics to bring into effect rapidly, and this has strong economic and social benefits. In this paper, based on the core idea of adaptive supply chain, we first give the concept of adaptive supply network model, and establish an emergency logistics network system, the operation of which is divided into 4 different stages. Then, for each stage, we analyze the change trend of the purposes which the emergency logistics pursuits, and introduce the coefficients of penalty functions in order to balance the timeliness, economy and risk. Finally, we construct a network optimization model for emergency logistics, which will provide a decision-making program for the smooth, timely and secure delivery of emergency supplies.
Penghui Wang,Hongxia Qiao,Qiong Feng,Cuizhen Xue 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.2
The constant current energization accelerated test was carried out to study the effect of asphalt coating on delaying reinforcement corrosion and rust-induced cracks in coated reinforced magnesium oxychloride cement concrete (CRMOCC). CRMOCC with different degrees of damage was scanned by adopting X-ray computed tomography (X-CT) technology, and the spatial information of rust and rust-induced cracks were analyzed visually and quantitatively. In addition, Scanning Electron Microscope (SEM) was used to analyze the non-uniformity of rust-induced crack formation. The results showed that the corrosion amount of coated reinforcement after energization was only 81.6% of that of uncoated reinforcement. Besides, no crack no cracking was observed on CRMOCC after 480h’s energization, while the rust-induced crack of reinforced magnesium oxychloride cement concrete (RMOCC) was 0.11 mm. The coating reduced the potential of rust-induced crack formation such that only three areas in CRMOCC were cracked, while RMOCC had cracks in eight areas. This study also found that interface transition zone (ITZ) played a dominant role in the formation of rust-induced cracks. The surface crack width in CRMOCC had an exponential relation with the crack volume and it had a linear relation with the volume of corrosion products. Further, there was an exponential relation between the volume loss of the reinforcement and the formation of rust-induced cracks. The correlation between surface crack width, corrosion products volume, rust-induced cracks volume and steel volume can be described by quadric surface. Results by SEM analysis indicated that in the ITZ of CRMOCC, Mg and O elements were the two main elements in the hydration products that were loose and needle-like. Furthermore, Si and O elements were the dominant materials in the non-interface transition zone (NITZ), resulting in relatively dense hydration products.