Introduction to Semi-Supervised Learning (Synthesis Lectures on Artificial Intelligence and Machine Learning)

Xiaojin Zhu; Andrew B. Goldberg

ISBN 10: 1598295470 / ISBN 13: 9781598295474

Published by Morgan and Claypool Publishers, 2009

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Bibliographic Details

• Title: Introduction to Semi-Supervised Learning (Synthesis Lectures on Artificial Intelligence and Machine Learning)
• Publisher: Morgan and Claypool Publishers
• Publication Date: 2009
• Language: English
• ISBN 10: 1598295470
• ISBN 13: 9781598295474
• Binding: Paperback
• Condition: Used; Good

About this title

Synopsis

Semi-supervised learning is a learning paradigm concerned with the study of how computers and natural systems such as humans learn in the presence of both labeled and unlabeled data. Traditionally, learning has been studied either in the unsupervised paradigm (e.g., clustering, outlier detection) where all the data is unlabeled, or in the supervised paradigm (e.g., classification, regression) where all the data is labeled.The goal of semi-supervised learning is to understand how combining labeled and unlabeled data may change the learning behavior, and design algorithms that take advantage of such a combination. Semi-supervised learning is of great interest in machine learning and data mining because it can use readily available unlabeled data to improve supervised learning tasks when the labeled data is scarce or expensive. Semi-supervised learning also shows potential as a quantitative tool to understand human category learning, where most of the input is self-evidently unlabeled. In this introductory book, we present some popular semi-supervised learning models, including self-training, mixture models, co-training and multiview learning, graph-based methods, and semi-supervised support vector machines. For each model, we discuss its basic mathematical formulation. The success of semi-supervised learning depends critically on some underlying assumptions. We emphasize the assumptions made by each model and give counterexamples when appropriate to demonstrate the limitations of the different models. In addition, we discuss semi-supervised learning for cognitive psychology. Finally, we give a computational learning theoretic perspective on semi-supervised learning, and we conclude the book with a brief discussion of open questions in the field.