Table 2 Model parameters Notation of... | Emerald Publishing

Table 2

Model parameters

Notation of parameters and variables	Parameter description
$G = (N, A)$	Railway network
$N$	Set of technical stations in the network
$S$	Set of stations within the hub
$i, j, s, t$	$i, j, s, t$ ∈ N; $s$ denotes a station within the hub capable of handling originating/terminating trains
$A$	Set of arcs (line sections) connecting two adjacent stations
$(i, j)$	Arc $(i, j)$ belongs to the set of arcs $A$
$T_{s 1}$	Unit operation time for originating/terminating activities at a station (seconds/train)
$T_{s 2}$	Standard running time of arc $(i, j)$ within the hub (seconds/train)
$b_{i j}$	Permitted line capacity of arc $(i, j)$ (trains/day)
$d_{s}$	Originating/terminating capacity of station $s$ (trains/day)
$Q_{s}$	Depot maintenance capacity at station $s$ ⁠, (trains/day)
$f_{1 s t}$	Flow of conventional trains from station $s$ to direction (t) (trains/day)
$f_{2 s t}$	Flow of EMU trains from station $s$ to direction (t) (trains/day)

Notation of parameters and variables	Parameter description
$G = (N, A)$	Railway network
$N$	Set of technical stations in the network
$S$	Set of stations within the hub
$i, j, s, t$	$i, j, s, t$ ∈ N; $s$ denotes a station within the hub capable of handling originating/terminating trains
$A$	Set of arcs (line sections) connecting two adjacent stations
$(i, j)$	Arc $(i, j)$ belongs to the set of arcs $A$
$T_{s 1}$	Unit operation time for originating/terminating activities at a station (seconds/train)
$T_{s 2}$	Standard running time of arc $(i, j)$ within the hub (seconds/train)
$b_{i j}$	Permitted line capacity of arc $(i, j)$ (trains/day)
$d_{s}$	Originating/terminating capacity of station $s$ (trains/day)
$Q_{s}$	Depot maintenance capacity at station $s$ , (trains/day)
$f_{1 s t}$	Flow of conventional trains from station $s$ to direction (t) (trains/day)
$f_{2 s t}$	Flow of EMU trains from station $s$ to direction (t) (trains/day)

Source(s): Authors' own work