Book Image

Machine Learning Techniques for Text

By : Nikos Tsourakis
Book Image

Machine Learning Techniques for Text

By: Nikos Tsourakis

Overview of this book

With the ever-increasing demand for machine learning and programming professionals, it's prime time to invest in the field. This book will help you in this endeavor, focusing specifically on text data and human language by steering a middle path among the various textbooks that present complicated theoretical concepts or focus disproportionately on Python code. A good metaphor this work builds upon is the relationship between an experienced craftsperson and their trainee. Based on the current problem, the former picks a tool from the toolbox, explains its utility, and puts it into action. This approach will help you to identify at least one practical use for each method or technique presented. The content unfolds in ten chapters, each discussing one specific case study. For this reason, the book is solution-oriented. It's accompanied by Python code in the form of Jupyter notebooks to help you obtain hands-on experience. A recurring pattern in the chapters of this book is helping you get some intuition on the data and then implement and contrast various solutions. By the end of this book, you'll be able to understand and apply various techniques with Python for text preprocessing, text representation, dimensionality reduction, machine learning, language modeling, visualization, and evaluation.
Table of Contents (13 chapters)

Introducing statistical machine translation

EBMT paved the way for data-driven approaches, where the primary source of knowledge is the observed data. As a result, less emphasis is given to the representation logic, such as creating hand-crafted rules. Instead, analyzing the data directly, especially when there’s a large amount of it, can reveal information we couldn’t easily identify otherwise. RBMT techniques follow a top-down approach, and domain experts are required to create models that can replicate the data. Conversely, data-driven approaches are bottom-up, and the data derives the model. This section focuses on statistical machine translation (SMT), which involves exploiting models whose parameters are learned from bilingual text corpora. Strictly speaking, SMT systems do not follow the Vauquois triangle as neither a source nor a target representation is incorporated. Intuitively, they work on the assumption that every sentence in one language can be translated...