China Railway Fifth Survey and Design Institute Group

Thermal response and inlet water temperature estimation for a geothermal bridge deck deicing system

Shallow geothermal energy provides a low-carbon approach to winter bridge-deck heating, but methods for matching heat-supply parameters to meteorological and icing loads remain limited. Field thermal-response tests were conducted on a demonstration bridge in Wuhan, China, and the...

Joint scheduling of distributed mixed-line high-speed train bogie maintenance: a multi-agent hierarchical deep reinforcement learning approach

Distributed mixed-line reassembly has emerged as a vital paradigm for high-speed train bogie maintenance. However, spatio-temporal heterogeneity complicates the joint scheduling of line assignments, operations and heavy component transportation. Because reassembly and transport c...