Table 2.

Property and parameter setting of farmers.

Property	Letter representation	Meaning	Assigned value
Woodland area	FS	Woodland area owned by each farmer	141.06e−0.523x mu
Farmer-enterprise distance	FEd	Distance from farmer to biomass enterprise	0∼300 km uniform distribution
Interval time of pruning	t	Time since last pruning	0∼5 years random distribution
Number of farmers	FNum	Number of farmers in the region	1000∼4000 (sliding strip)
Unit amount collected	UAmo	Quantity of raw materials collected per unit woodland	1 t/mu
Actual collection rate	α	Random factors such as season	0.5∼1 random distribution
Unit pruning cost	FCost	Cost of raw materials collected per unit woodland	70∼200 yuan/t (sliding strip)
Unit pruning subsidy	CSub	Government subsidy for unit woodland pruning	Input box input (yuan)