原文地址 Warm up: a fast matrix-based approach to computing the output from a neural network The two assumptions we need about the cost function 两个假设： \[C=\frac{1}{2n}\sum_x \left \| y(x)-a^{L...

原文地址 perceptrons（感知器） 1950s-1960s by scientist Frank Rosenblatt 数学模型： 所有权重参数为w1,w2…，threshold threshold，Dropping the threshold means you’re more willing to go to the festival. 与权重b是同一种意...