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9780470684030

Bayesian Networks : An Introduction

by Timo Koski (Royal Institute of Technology,  Sweden ); John Noble (University of Linkö ping, Sweden )
  • ISBN13:

    9780470684030

  • ISBN10:

    0470684038

  • Format: eBook
  • Copyright: 2009-09-01
  • Publisher: Wiley
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Summary

Bayesian Networks: An Introduction provides a self-contained introduction to the theory and applications of Bayesian networks, a topic of interest and importance for statisticians, computer scientists and those involved in modelling complex data sets. The material has been extensively tested in classroom teaching and assumes a basic knowledge of probability, statistics and mathematics. All notions are carefully explained and feature exercises throughout. Features include: An introduction to Dirichlet Distribution, Exponential Families and their applications. A detailed description of learning algorithms and Conditional Gaussian Distributions using Junction Tree methods. A discussion of Pearl's intervention calculus, with an introduction to the notion of see and do conditioning. All concepts are clearly defined and illustrated with examples and exercises. Solutions are provided online. This book will prove a valuable resource for postgraduate students of statistics, computer engineering, mathematics, data mining, artificial intelligence, and biology. Researchers and users of comparable modelling or statistical techniques such as neural networks will also find this book of interest.

Table of Contents

Preface
Graphical models and probabilistic reasoning
Introduction
Axioms of probability and basic notations
The Bayes update of probability
Inductive learning
Interpretations of probability and Bayesian networks
Learning as inference about parameters
Bayesian statistical inference
Tossing a thumb-tack
Multinomial sampling and the Dirichlet integral
Notes
Exercises: Probabilistic theories of causality, Bayes' rule, multinomial sampling and the Dirichlet density
Conditional independence, graphs and d-separation
Joint probabilities
Conditional independence
Directed acyclic graphs and d-separation
The Bayes ball
Potentials
Bayesian networks
Object oriented Bayesian networks
d-Separation and conditional independence
Markov models and Bayesian networks
I-maps and Markov equivalence
Notes
Exercises: Conditional independence and d-separation
Evidence, sufficiency and Monte Carlo methods
Hard evidence
Soft evidence and virtual evidence
Queries in probabilistic inference
Bucket elimination
Bayesian sufficient statistics and prediction sufficiency
Time variables
A brief introduction to Markov chain Monte Carlo methods
The one-dimensional discrete Metropolis algorithm
Notes
Exercises: Evidence, sufficiency and Monte Carlo methods
Decomposable graphs and chain graphs
Definitions and notations
Decomposable graphs and triangulation of graphs
Junction trees
Markov equivalence
Markov equivalence, the essential graph and chain graphs
Notes
Exercises: Decomposable graphs and chain graphs
Learning the conditional probability potentials
Initial illustration: maximum likelihood estimate for a fork connection
The maximum likelihood estimator for multinomial sampling
MLE for the parameters in a DAG: the general setting
Updating, missing data, fractional updating
Notes
Exercises: Learning the conditional probability potentials
Learning the graph structure
Assigning a probability distribution to the graph structure
Markov equivalence and consistency
Reducing the size of the search
Monte Carlo methods for locating the graph structure
Women in mathematics
Notes
Exercises: Learning the graph structure
Parameters and sensitivity
Changing parameters in a network
Measures of divergence between probability distributions
The Chan-Darwiche distance measure
Parameter changes to satisfy query constraints
The sensitivity of queries to parameter changes
Notes
Exercises: Parameters and sensitivity
Graphical models and exponential families
Introduction to exponential families
Standard examples of exponential families
Graphical models and exponential families
Noisy 'or' as an exponential family
Properties of the log partition function
Fenchel Legendre conjugate
Kullback-Leibler divergence
Mean field theory
Conditional Gaussian distributions
Notes
Exercises: Graphical models and exponential families
Causality and intervention calculus
Introduction
Conditioning by observation and by intervention
The intervention calculus for a Bayesian network
Properties of intervention calculus
Transformations of probability
A note on the order of 'see' and 'do' conditioning
The 'Sure Thing' principle
Back door criterion, confounding and identifiability
Notes
Exercises: Causality and intervention calculus
The junction tree and probability updating
Probability updating using a junction tree
Potentials and the distributive law
Elimination and domain graphs
Factorization along an undirected graph
Factorizing along a junction tree
Local computation on junction trees
Schedules
Local and global consistency
Message passing for conditional Gaussian distributions
Using a junction tree with virtual evidence and soft evidence
Notes
Exercises: The junction tree and probability updating
Factor graphs and the sum product algorithm
Factorization and local potentials
The sum product algorithm
Detailed illustration of the algorithm
Notes
Exercise: Factor graphs and the sum product algorithm
References
Index
Table of Contents provided by Publisher. All Rights Reserved.

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