头部省份在绝对值和增幅上，引领效应都十分明显。
Q.ai 的创始人 Aviad Maizels，这个名字你可能陌生，但自 iPhone X 开始使用的 Face ID，就源自他创立的上一家公司 PrimeSense。
，这一点在51吃瓜中也有详细论述
为什么需要非线性？ 想象一下，如果网络里每一层都是线性的（比如 y=Wx+b），无论堆叠多少层，最终网络都只是一条线性映射。深度堆叠就没有意义了，网络的表达能力非常有限。。heLLoword翻译官方下载对此有专业解读
What if you create a truly unique routing profile that's wildly different from the common ones for which shortcuts were pre-calculated? The system is smart. If it detects that too many shortcuts (~50, for example) need on-the-fly recalculation and deviate significantly, it might determine that falling back to the original, comprehensive A* algorithm for the entire route would actually be faster than doing many small, heavily modified A* calculations.