A Multiobjective Optimization Model for Continuous Allocation of Emergency Rescue Materials

Table 1

Notation and symbols.

n		The total number of storage units that can provide emergency rescue materials
m		Types of emergency rescue materials
T		Estimated emergency rescue time
A		Emergency rescue location
Bi		The i-th storage unit of emergency rescue materials, i = 1, 2, …, n
qj		Estimated quantity of the rescue material of type j,
ti		Travel time from the storage unit Bi to the rescue location , i = 1, 2, …, n
Lj		The loss caused by the lack of the material of type j in unit time,
		The amount of the material of type j consumed per unit of time,
Sij		The storage capacity for the material of type j provided by the storage unit Bi, i = 1, 2, …, n,
Cij		The cost of sending one unit of the material of type j from the storage unit Bi to the rescue location A, i = 1, 2, …, n,
xij		The demand for the material of type j from the storage unit Bi to the rescue location A, i = 1, 2, …, n,
Rij		The remaining amount of the material of type j from the storage unit Bi to the rescue location A, when the time is ti, i = 1, 2, …, n,