随后该书分为三部分，第一部分是应用数学和机器学习基础，当初步具有上述理论基础后，才算叩开深度学习的大门。第二部分是深层网络的现代实践。第三部分是深度学习的理论研究，适用于想要执果索因、深入学习神经网络内在原理的研究人员学习。(The book is divided into three parts, the first part is the application of mathematical and machine learning based. When initially with the above theoretical basis, it is open the door deep learning. The second part is the modern practice of the deep web. The third part is the theoretical research of deep learning, suitable for want result reason, researchers studying internal principle of neural network learning.)