A New Spectral Three-Term Conjugate Gradient Method with Random Parameter Based on Modified Secant Equation and Its Application to Low-Carbon Supply Chain Optimization

Table 3

Symbolic explanation table.

Symbolic variables		Unit production cost of new products
		Potential market demand
		Unit carbon emissions trading price
		The initial amount of carbon emissions allocated by the government
		Warranty period sensitivity coefficient for quantity of repaired products
		Potential product repair quantity
		Carbon emission reduction investment cost coefficient
		Carbon emissions from the production of one unit of new product
		Warranty period investment cost coefficient
		Revenue sharing ratio
		Consumer sensitivity coefficient
		Market demand
		Total number of products returned for repair
		Profit function for the entire LSCS in the mode
Decision variables		Unit retail price
		Warranty period
		Carbon emission reduction level of product