Showing 621 - 640 results of 1,154 for search 'Air China', query time: 0.10s Refine Results
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    Mixed Integer Linear Programming Based Speed Profile Optimization for Heavy-Haul Trains by Huazhen Yu, Yihui Wang, Andrea D’Ariano, Anzheng Lai, Youneng Huang

    Published 2023-01-01
    “…Due to the presence of long and steep downgrades (LSDs) on some heavy-haul lines, the brake forces of the HHT are typically jointly determined by air braking and electric braking. The time characteristics of the air braking, such as the command delay and the change process caused by the air pressure, are taken into account, and then formulas are presented to calculate the air brake force. …”
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    Simulation Study on the Effect of Forced Ventilation in Tunnel under Single-Head Drilling and Blasting by Qingsong Pu, Yi Luo, Junhong Huang, Yingwei Zhu, Shaohua Hu, Chenhao Pei, Guang Zhang, Xinping Li

    Published 2020-01-01
    “…Based on the excavation of Yuelongmen tunnel on ChengLan Railway in China, this paper will probe into the forced ventilation effect of harmful gas generated by drilling and blasting construction, simulate the diffusion process of harmful gas generated during blasting operation on the tunnel face by establishing the finite element model of gas turbulent flow and concentration diffusion in the tunnel, and study the spatial-temporal evolution law of CO concentration field under different air pipe layout locations and tunnel excavation methods. …”
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