图7. 区域场圆滑前后效果对比 a—圆滑前区域场(上)及局部场(下);b—圆滑后区域场(上)及局部场(下)
Fig.7. Comparison of effect before and after the regional field is smooth a—smooth front regional field (upper) and local field (lower);b—smooth posterior regional field (upper) and local field (lower)