年份

真实值

PSO-BP

BP

万吨

拟合值

相对误差

拟合值

相对误差

2017

96,076

97,036

1.00%

97,790

1.78%

2018

102,536

100,330

2.15%

91,511

10.75%

2019

106,417

100,630

5.44%

94,370

11.32%

2020

86,444

88,510

2.39%

78,097

9.66%

2021

96,990

88,890

8.35%

84,504

12.87%