Book Image

Advanced Natural Language Processing with TensorFlow 2

By : Ashish Bansal, Tony Mullen
Book Image

Advanced Natural Language Processing with TensorFlow 2

By: Ashish Bansal, Tony Mullen

Overview of this book

Recently, there have been tremendous advances in NLP, and we are now moving from research labs into practical applications. This book comes with a perfect blend of both the theoretical and practical aspects of trending and complex NLP techniques. The book is focused on innovative applications in the field of NLP, language generation, and dialogue systems. It helps you apply the concepts of pre-processing text using techniques such as tokenization, parts of speech tagging, and lemmatization using popular libraries such as Stanford NLP and SpaCy. You will build Named Entity Recognition (NER) from scratch using Conditional Random Fields and Viterbi Decoding on top of RNNs. The book covers key emerging areas such as generating text for use in sentence completion and text summarization, bridging images and text by generating captions for images, and managing dialogue aspects of chatbots. You will learn how to apply transfer learning and fine-tuning using TensorFlow 2. Further, it covers practical techniques that can simplify the labelling of textual data. The book also has a working code that is adaptable to your use cases for each tech piece. By the end of the book, you will have an advanced knowledge of the tools, techniques and deep learning architecture used to solve complex NLP problems.
Table of Contents (13 chapters)
11
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12
Index

General conversational agents

Seq2seq models provide the best inspiration for learning multi-turn general conversations. A useful mental model is that of machine translation. Similar to the machine translation problem, the response to the previous question can be thought of as a translation of that input into a different language – the response. Encoding more context into a conversation can be achieved by passing in a sliding window of the previous conversation turns instead of just the last question/statement. The term open-domain is often used to describe bots in this area as the domain of the conversation is not fixed. The bot should be able to discuss a wide variety of topics. There are several issues that are their own research topics.

Lack of personality or blandness is one such problem. The dialog is very dry. As an example, we have seen the use of a temperature hyperparameter to adjust the predictability of the response in previous chapters. Conversational agents...