An Optimization Method of Multiclass Price Railway Passenger Transport Ticket Allocation under High Passenger Demand

Table 1

The meaning of unconstrained demand model symbol in high-speed rail passenger transport.

Symbol	Meaning
(observation point)	Selected observation points during the presale period
(observation booking)	Observation booking observed in the system
(booking limit)	Booking limit in the system
(unconstrained demand)	The real needs of passengers
(unconstrained demand-to-come)	The total unconstrained demand from a certain time to departure
(incremental demand)	Increased demand between two adjacent intervals
=  (closed/open)	The open state of the scheduled system at a certain time
(number)	The number of booking situations in the same historical period