$ϵ=1e-3$

$ϵ=1e-4$

$ϵ=1e-5$

${\sigma }^2$

aNCG-MC

NCG-MC

节省

aNCG-MC

NCG-MC

节省

aNCG-MC

NCG-MC

节省

0.01

400

2001

80.01%

551

2341

76.46%

824

2179

62.18%

0.5

320

410

21.95%

717

1316

45.52%

1678

2111

20.51%