Several models and applications for deep learning

As a popular technology in recent years, deep learning has attracted widespread attention from academic research to industrial application. In this paper, we briefly summarize the important concepts and decisive factors in the development of deep learning. Then the representative contemporary algorithms are mentioned. It summarizes the 6 main deep learning models of the current mainstream academic research and expounds their principles, illustrating the concepts and characteristics of different kinds of neural network structure models. Certain industrial applications, including speech recognition, image recognition and artificial intelligence, are presented to analyze the future trends and the main challenges.