前向传播：神经网络如何处理数据
英文摘要
This is Day 4 of a Medium series on building neural networks from scratch. The post covers forward propagation, the process by which a neural network processes input data to produce an output. The available snippet does not provide detailed technical content; it serves as an introduction to the tutorial installment.
中文摘要
本文是Medium上从零构建神经网络系列的第四天。文章主题为前向传播，即神经网络处理输入数据产生输出的过程。现有片段未提供具体技术细节，仅为该教程章节的简介。
关键要点
This is part of a tutorial series on building neural networks from scratch, with Day 4 focusing on forward propagation.
这是从零构建神经网络教程系列的一部分，第四天聚焦于前向传播。