OPEC+ Looks Willing to Defy Oil Bears’ Warnings AgainThe group has gained room to maneuver thanks to factors beyond its control.
优点：计算简单，导数恒为1（正区间），缓解梯度消失
，详情可参考夫子
Graceful Fallback for Extreme Customization:
Владимир Зеленский. Фото: PRESIDENT OF UKRAINE / Keystone Press Agency / Global Look Press