Book Image

Python: Advanced Guide to Artificial Intelligence

By : Giuseppe Bonaccorso, Rajalingappaa Shanmugamani
Book Image

Python: Advanced Guide to Artificial Intelligence

By: Giuseppe Bonaccorso, Rajalingappaa Shanmugamani

Overview of this book

This Learning Path is your complete guide to quickly getting to grips with popular machine learning algorithms. You'll be introduced to the most widely used algorithms in supervised, unsupervised, and semi-supervised machine learning, and learn how to use them in the best possible manner. Ranging from Bayesian models to the MCMC algorithm to Hidden Markov models, this Learning Path will teach you how to extract features from your dataset and perform dimensionality reduction by making use of Python-based libraries. You'll bring the use of TensorFlow and Keras to build deep learning models, using concepts such as transfer learning, generative adversarial networks, and deep reinforcement learning. Next, you'll learn the advanced features of TensorFlow1.x, such as distributed TensorFlow with TF clusters, deploy production models with TensorFlow Serving. You'll implement different techniques related to object classification, object detection, image segmentation, and more. By the end of this Learning Path, you'll have obtained in-depth knowledge of TensorFlow, making you the go-to person for solving artificial intelligence problems This Learning Path includes content from the following Packt products: • Mastering Machine Learning Algorithms by Giuseppe Bonaccorso • Mastering TensorFlow 1.x by Armando Fandango • Deep Learning for Computer Vision by Rajalingappaa Shanmugamani
Table of Contents (31 chapters)
Title Page
About Packt
Contributors
Preface
19
Tensor Processing Units
Index

GRU network


LSTM Network is computationally expensive, hence, researchers found an almost equally effective configuration of RNNs, known as Gated Recurrent Unit (GRU) architecture. 

In GRU, instead of a working and a long-term memory, only one kind of memory is used, indicated with h (hidden state). The GRU cell adds information to this state memory or removes information from this state memory through reset and update gates.

Following diagram depicts the GRU cell (explanation follows the diagram):

The GRU Cell

The  internal flow through the gates in the GRU cell is as follows:

  1. Update gate u( ): The input
     and 
     flows to the u( ) gate as per the following equation:
  2. Reset Gate r( ): The input 
     and 
     flows to the r( )gate as per the following equation:
  1. Candidate State Memory: The candidate long-term memory is computed from the output of the r( )gate, 
    , and
    , as per the following equation:
  2. Next, the preceding three calculations are combined to get the updated state memory, denoted by
    , as per following...