One of the most common problems in NLP and topic modeling is represented by the semantic-free structure of the Bag-of-Words strategy. In fact, as discussed in the previous chapter, Chapter 13, Introducing Natural Language Processing, this strategy is based on frequency counts and doesn't take into account the positions and the similarity of the tokens. The problem can be partially mitigated by employing n-grams; however, it's still impossible to detect the contextual similarity of words. For example, let's suppose that a corpus contains the sentences John lives in Paris and Mark lives in Rome. If we perform a Part-of-Speech (POS) and Named Entity Recognition (NER) tagging, we can discover that John and Mark are proper nouns and Paris and Rome are cities. Hence, we can deduce that the two sentences share the same structure; Paris...
Machine Learning Algorithms
Machine Learning Algorithms
Overview of this book
Machine learning has gained tremendous popularity for its powerful and fast predictions with large datasets. However, the true forces behind its powerful output are the complex algorithms involving substantial statistical analysis that churn large datasets and generate substantial insight.
This second edition of Machine Learning Algorithms walks you through prominent development outcomes that have taken place relating to machine learning algorithms, which constitute major contributions to the machine learning process and help you to strengthen and master statistical interpretation across the areas of supervised, semi-supervised, and reinforcement learning. Once the core concepts of an algorithm have been covered, you’ll explore real-world examples based on the most diffused libraries, such as scikit-learn, NLTK, TensorFlow, and Keras. You will discover new topics such as principal component analysis (PCA), independent component analysis (ICA), Bayesian regression, discriminant analysis, advanced clustering, and gaussian mixture.
By the end of this book, you will have studied machine learning algorithms and be able to put them into production to make your machine learning applications more innovative.
Table of Contents (19 chapters)
Preface
Free Chapter
A Gentle Introduction to Machine Learning
Important Elements in Machine Learning
Feature Selection and Feature Engineering
Regression Algorithms
Linear Classification Algorithms
Naive Bayes and Discriminant Analysis
Support Vector Machines
Decision Trees and Ensemble Learning
Clustering Fundamentals
Advanced Clustering
Hierarchical Clustering
Introducing Recommendation Systems
Introducing Natural Language Processing
Topic Modeling and Sentiment Analysis in NLP
Introducing Neural Networks
Advanced Deep Learning Models
Creating a Machine Learning Architecture
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