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Neural Networks with Keras Cookbook

Neural Networks with Keras Cookbook

By : V Kishore Ayyadevara
3.3 (8)
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Neural Networks with Keras Cookbook

Neural Networks with Keras Cookbook

3.3 (8)
By: V Kishore Ayyadevara

Overview of this book

This book will take you from the basics of neural networks to advanced implementations of architectures using a recipe-based approach. We will learn about how neural networks work and the impact of various hyper parameters on a network's accuracy along with leveraging neural networks for structured and unstructured data. Later, we will learn how to classify and detect objects in images. We will also learn to use transfer learning for multiple applications, including a self-driving car using Convolutional Neural Networks. We will generate images while leveraging GANs and also by performing image encoding. Additionally, we will perform text analysis using word vector based techniques. Later, we will use Recurrent Neural Networks and LSTM to implement chatbot and Machine Translation systems. Finally, you will learn about transcribing images, audio, and generating captions and also use Deep Q-learning to build an agent that plays Space Invaders game. By the end of this book, you will have developed the skills to choose and customize multiple neural network architectures for various deep learning problems you might encounter.
Table of Contents (18 chapters)
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Assigning weights for classes

When we assign equal weightage to the rows that belong to a defaulter and the rows that belong to a non-defaulter, potentially the model can fine-tune for the non-defaulters. In this section, we will look into ways of assigning a higher weightage so that our model classifies defaulters better.

Getting ready

In the previous section, we assigned the same weightage for each class; that is, the categorical cross entropy loss is the same if the magnitude of difference between actual and predicted is the same, irrespective of whether it is for the prediction of a default or not a default.

To understand the scenario further, let's consider the following example:

Scenario Probability of default...
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