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The Handbook of NLP with Gensim

The Handbook of NLP with Gensim

By : Chris Kuo
5 (6)
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The Handbook of NLP with Gensim

The Handbook of NLP with Gensim

5 (6)
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)
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1
Part 1: NLP Basics
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5
Part 2: Latent Semantic Analysis/Latent Semantic Indexing
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9
Part 3: Word2Vec and Doc2Vec
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12
Part 4: Topic Modeling with Latent Dirichlet Allocation
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Part 5: Comparison and Applications
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22
Index
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Tips on building a good Doc2Vec model

I would like to offer two perspectives:

  • It is important to train Doc2Vec with lots of data to achieve stable results. The more words in a paragraph/document, the better. A document with less than 5 words is not easy to differentiate from any other.
  • Lemmatization or stemming may not necessarily improve the results. You could try and test a model with lemmatization and a model without. The authors [2] report that “PV-DM is consistently better than PV-DBOW.” Hence the default model in the Gensim class is the PV-DM model.

That completes our discussion in this chapter.

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