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- 저자 : Shengjie Qiang (검색결과 2 건)
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The Impact of Aircraft Cabin Environment on Passenger Boarding Efficiency and Robustness
Shengjie Qiang,Qingxia Huang 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.3
The foldable and the side-slip seats are designed to facilitate the aircraft boarding process by providing wider spaces. Yet, these futuristic concepts have not been investigated exhaustively concerning boarding time performance and the sensitivity of various factors. Thus, we test the effectiveness of such two new concept seats by using a cellular automaton (CA) based aircraft boarding model. Simulation results confirm the potentials of improving efficiency by using the two innovative seats, and of which the foldable seat prevails over the side-slip seat in boarding time. About 12.7% and 30% time reduction could be achieved for the side-slip seat and the foldable seat by taking the conventional seat performance as a baseline, and this value could be further increased by using some other refined boarding strategies. Moreover, the foldable seat exhibits much robustness to the variation of the boarding conditions than the side-slip seat and thus could provide a much reliable boarding environment.
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Peng Zhang,Han Wang,ShengJie Yao,ChuanJie Wang,Qiang Zhu,Gang Chen 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.2
The Cu–3 wt%Ag–0.5 wt%Zr are rolled with the same reduction process at room (RT) and cryogenic (CT) temperature,respectively. The electron backscatter diffraction and transmission electron microscope are used to analyze and comparethe evolutions of material microstructure and texture. The results show that the stability of as-rolled CT sheets is differentfrom that of the RT samples, which can be verified by the lower temperature for the occurrence of recrystallization andAg-base particles precipitation. Besides the Brass, Copper and S textures which are exhibited in the two kinds of as-rolledsheets, there are also Q and P texture components in the as-rolled CT sheets. The constitutive equation basing on evolutionof dislocation mean free path (L) and dislocation cell size (dDC) with plastic strain indicates that the initial values of L, dDCand mobile dislocation density (ρm) are associated with annealing condition closely. Furthermore, the strain ranges of thestable and instable plastic deformation are related to the degree of recovery and recrystallization.
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