neural networks学习笔记(二)

本文深入探讨了BP神经网络的工作原理,从概念入手逐步过渡到具体的数学推导,并详细解析了BP算法中的四个核心方程及Hadamard乘积等关键知识点。

继续看理论,补一下之前跳过的BP神经网络

How the backpropagation algorithm works

看了四分之一都在介绍概念和幺蛾子

Hadamard product
这里写图片描述

四个方程
这里写图片描述
推导
这里写图片描述

BP过程:
这里写图片描述

Uncover the power of artificial neural networks by implementing them through R code. About This Book Develop a strong background in neural networks with R, to implement them in your applications Build smart systems using the power of deep learning Real-world case studies to illustrate the power of neural network models Who This Book Is For This book is intended for anyone who has a statistical background with knowledge in R and wants to work with neural networks to get better results from complex data. If you are interested in artificial intelligence and deep learning and you want to level up, then this book is what you need! What You Will Learn Set up R packages for neural networks and deep learning Understand the core concepts of artificial neural networks Understand neurons, perceptrons, bias, weights, and activation functions Implement supervised and unsupervised machine learning in R for neural networks Predict and classify data automatically using neural networks Evaluate and fine-tune the models you build. In Detail Neural networks are one of the most fascinating machine learning models for solving complex computational problems efficiently. Neural networks are used to solve wide range of problems in different areas of AI and machine learning. This book explains the niche aspects of neural networking and provides you with foundation to get started with advanced topics. The book begins with neural network design using the neural net package, then you'll build a solid foundation knowledge of how a neural network learns from data, Table of Contents Chapter 1. Neural Network and Artificial Intelligence Concepts Chapter 2. Learning Process in Neural Networks Chapter 3. Deep Learning Using Multilayer Neural Networks Chapter 4. Perceptron Neural Network Modeling – Basic Models Chapter 5. Training and Visualizing a Neural Network in R Chapter 6. Recurrent and Convolutional Neural Networks Chapter 7. Use Cases of Neural Networks – Advanced Topics
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