forward propagation

Tencent Cloud Developer

Oct 15, 2018 · Artificial Intelligence

Neural Network Fundamentals: Building Your Own Neural Network from Scratch in Python

This tutorial explains neural network fundamentals by defining layers, weights, biases, and sigmoid activation, then walks through building a Python class that implements forward propagation, a sum‑of‑squared‑error loss, and backpropagation using the chain rule and gradient descent to train a simple two‑layer network.