Joint Transportation and Inventory Strategy for Perishable Items with Weibull Distribution under Carbon Emission Regulations

Table 2

Main notations and explanations.

Notation	Explanation
	order quantity (decision variable)
	initial inventory level, that is, reorder level
	transportation time
	length of replenishment cycle, . (decision variable)
	inventory level in the process at time , and represent
	transportation and sale processes.
	demand rate at time , , where and
	represent the initial demand and elasticity coefficient.
	deterioration rate at time , , where and .
	selling price per unit product
	setup cost in transportation and ordering processes
	transportation and ordering cost per unit product
	holding cost per unit product in the th process, and represent
	transportation and sale processes, respectively.
	cost of spoilage treatment per unit product
	fixed carbon emissions for each order
	carbon emissions per unit product for each order
	carbon emissions per unit product in the th process, and
	represent transportation and sale processes.
	carbon emissions generated from treating unit spoilage product
	quota of carbon emissions given by government
	trading price of unit carbon emission permit
	tax for unit carbon emission