Book Image

Natural Language Processing with TensorFlow

By : Motaz Saad, Thushan Ganegedara
Book Image

Natural Language Processing with TensorFlow

By: Motaz Saad, Thushan Ganegedara

Overview of this book

Natural language processing (NLP) supplies the majority of data available to deep learning applications, while TensorFlow is the most important deep learning framework currently available. Natural Language Processing with TensorFlow brings TensorFlow and NLP together to give you invaluable tools to work with the immense volume of unstructured data in today’s data streams, and apply these tools to specific NLP tasks. Thushan Ganegedara starts by giving you a grounding in NLP and TensorFlow basics. You'll then learn how to use Word2vec, including advanced extensions, to create word embeddings that turn sequences of words into vectors accessible to deep learning algorithms. Chapters on classical deep learning algorithms, like convolutional neural networks (CNN) and recurrent neural networks (RNN), demonstrate important NLP tasks as sentence classification and language generation. You will learn how to apply high-performance RNN models, like long short-term memory (LSTM) cells, to NLP tasks. You will also explore neural machine translation and implement a neural machine translator. After reading this book, you will gain an understanding of NLP and you'll have the skills to apply TensorFlow in deep learning NLP applications, and how to perform specific NLP tasks.
Table of Contents (16 chapters)
Natural Language Processing with TensorFlow
Contributors
Preface
Index

Inference with NMT


Inferencing is slightly different from the training process for NMT (Figure 10.11). As we do not have a target sentence at the inference time, we need a way to trigger the decoder at the end of the encoding phase. This shares similarities with the image captioning exercise we did in Chapter 9, Applications of LSTM – Image Caption Generation. In that exercise, we appended the <SOS> token to the beginning of the captions to denote the start of the caption and <EOS> to denote the end.

We can simply do this by giving <s> as the first input to the decoder, then by getting the prediction as the output, and by feeding in the last prediction as the next input to the NMT:

  1. Preprocess xs as explained previously

  2. Feed xs into and calculate v conditioned on xs
  3. Initialize with v
  4. For the initial prediction step, predict by conditioning the prediction on and v
  5. For subsequent time steps, while , predict by conditioning the prediction on and v

    Figure 10.11: Inferring...