Book Image

The Handbook of NLP with Gensim

By : Chris Kuo
Book Image

The Handbook of NLP with Gensim

By: Chris Kuo

Overview of this book

Navigating the terrain of NLP research and applying it practically can be a formidable task made easy with The Handbook of NLP with Gensim. This book demystifies NLP and equips you with hands-on strategies spanning healthcare, e-commerce, finance, and more to enable you to leverage Gensim in real-world scenarios. You’ll begin by exploring motives and techniques for extracting text information like bag-of-words, TF-IDF, and word embeddings. This book will then guide you on topic modeling using methods such as Latent Semantic Analysis (LSA) for dimensionality reduction and discovering latent semantic relationships in text data, Latent Dirichlet Allocation (LDA) for probabilistic topic modeling, and Ensemble LDA to enhance topic modeling stability and accuracy. Next, you’ll learn text summarization techniques with Word2Vec and Doc2Vec to build the modeling pipeline and optimize models using hyperparameters. As you get acquainted with practical applications in various industries, this book will inspire you to design innovative projects. Alongside topic modeling, you’ll also explore named entity handling and NER tools, modeling procedures, and tools for effective topic modeling applications. By the end of this book, you’ll have mastered the techniques essential to create applications with Gensim and integrate NLP into your business processes.
Table of Contents (24 chapters)
1
Part 1: NLP Basics
5
Part 2: Latent Semantic Analysis/Latent Semantic Indexing
9
Part 3: Word2Vec and Doc2Vec
12
Part 4: Topic Modeling with Latent Dirichlet Allocation
18
Part 5: Comparison and Applications

Topic modeling with BERTopic

BERTopic is a topic modeling algorithm that is based on the BERT word embeddings. In Chapter 14, LDA and BERTopic, we will learn the key components of BERTopic and build our own model. In addition, the BERTopic modeling has its own visualization functions that are similar to pyLDAvis, as seen in Figure 1.4. We will learn to use all the visualization functions as well.

Figure 1.5 shows the top words for eight topics:

ght topics:

Figure 1.5 – An overview of topic modeling results by BERTopic (also presented in Chapter 14)

Figure 1.5 – An overview of topic modeling results by BERTopic (also presented in Chapter 14)

I trust these introductions have given you a strong appetite to dive into each chapter and apply the models discussed in your future work. Now, let's get familiar with the terminology commonly used in NLP.