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缺点：容易饱和（输入过大或过小时梯度接近0，导致梯度消失），推荐阅读夫子获取更多信息
然而，总有巨头能打破常规。在普遍受“分母”影响的背景下，千亿元研发投入的华为，研发强度达到20.85%，位列5896家有效企业的前9%。当企业将研发作为核心竞争力而非成本项时，有望跳出规模与创新的博弈，实现“研发强度与营收规模双高”的罕见平衡。
如果说字节跳动作为一个「外人」，做的尝试对国民级 app 犯了「大不敬」——Google 来做这件事情，意义就完全不一样了。