Evolution mechanism and generation method of urban rail transit network 并列题名：Evolution mechanism and generation method of urban rail transit network Development mechanism and organization method of urban and rural transit Design practice and innovation of urban rail transit depot Formation mechanism and optimization method of new energy project safety cost Theory and application of operation safety assurance of urban rail transit network 并列题名：Design practice and innovation of urban rail transit depot Leakage diffusion mechanism and safety monitoring technology of urban gas pipeline network 并列题名：Theory and application of operation safety assurance of urban rail transit network Deterioration mechanism and evaluation method of ballastless track for high-speed railway