A Multi-Scenario Optimization Model for Emergency Cold Chain Logistics Distribution
Table 3
Parameters.
Symbol
Meaning
The number of products requested by under the scenario , which is uncertain.
The number of products that are available at the distribution center.
The number of available vehicles at the distribution center.
Carrying capacity. indicates how many products a vehicle can carry.
,
is the transportation cost of a vehicle per kilometer. is the distance between and .
The fixed cost of using a vehicle.
,
indicates whether meet the ’s () demand for under the scenario . is the penalty cost of failing to fulfill or exceeding the ’s () demand for under the scenario .
The rental fee of a vehicle.
The price of .
,
is the time of the vehicle arriving at the under the scenario . is the time of the vehicle leaving the under the scenario .
The travel time of the vehicle from to under the scenario ., where is the speed of the vehicle .
The service time of the vehicle for the customer ().
The time window of the customer ().
The number of products carried in the vehicle from to under the scenario .
