我觉得没有
我自己有认识一些美国/加拿大人,他们的情况是本身是instructor/lecturer,在职期间有paper发表,但(我猜)可能都是影响因子不高的jounral (otherwise I think I would've heard of them)
但他们聊起来的时候都是很自信的,包括面试他们的人也会说oh you've already had some publications, that's nice/impressive
虽然原则是有高因子的publication固然是好事,但对一个还没入门的人来说太demanding了吧所以楼主自信一点啦,any publication or submission is good