Benefits of Bayesian Network Models
By Philippe Weber and Christophe Simon
()
About this ebook
The application of Bayesian Networks (BN) or Dynamic Bayesian Networks (DBN) in dependability and risk analysis is a recent development. A large number of scientific publications show the interest in the applications of BN in this field.
Unfortunately, this modeling formalism is not fully accepted in the industry. The questions facing today's engineers are focused on the validity of BN models and the resulting estimates. Indeed, a BN model is not based on a specific semantic in dependability but offers a general formalism for modeling problems under uncertainty.
This book explains the principles of knowledge structuration to ensure a valid BN and DBN model and illustrate the flexibility and efficiency of these representations in dependability, risk analysis and control of multi-state systems and dynamic systems.
Across five chapters, the authors present several modeling methods and industrial applications are referenced for illustration in real industrial contexts.
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Benefits of Bayesian Network Models - Philippe Weber
Table of Contents
Cover
Title
Copyright
Foreword by J.-F. Aubry
Foreword by L. Portinale
Acknowledgments
Introduction
I.1. Problem statement
I.2. Book structure
PART 1: Bayesian Networks
1 Bayesian Networks: a Modeling Formalism for System Dependability
1.1. Probabilistic graphical models: BN
1.2. Reliability and joint probability distributions
1.3. Discussion and conclusion
2 Bayesian Network: Modeling Formalism of the Structure Function of Boolean Systems
2.1. Introduction
2.2. BN models in the Boolean case
2.3. Standard Boolean gates CPT
2.4. Non-deterministic CPT
2.5. Industrial applications
2.6. Conclusion
3 Bayesian Network: Modeling Formalism of the Structure Function of Multi-State Systems
3.1. Introduction
3.2. BN models in the multi-state case
3.3. Non-deterministic CPT
3.4. Industrial applications
3.5. Conclusion
PART 2: Dynamic Bayesian Networks
4 Dynamic Bayesian Networks: Integrating Environmental and Operating Constraints in Reliability Computation
4.1. Introduction
4.2. Component modeled by a DBN
4.3. Model of a dynamic multi-state system
4.4. Discussion on dependent processes
4.5. Conclusion
5 Dynamic Bayesian Networks: Integrating Reliability Computation in the Control System
5.1. Introduction
5.2. Integrating reliability information into the control
5.3. Control integrating reliability modeled by DBN
5.4. Application to a drinking water network
5.5. Conclusion
5.6. Acknowledgments
Conclusion
Bibliography
Index
End User License Agreement
List of Tables
1 Bayesian Networks: a Modeling Formalism for System Dependability
Table 1.1. Generic definition of a conditional probability table
Table 1.2. Probability distributions of component states
Table 1.3. Joint probability distributions modeling the three-valve system, part 1
Table 1.4. Joint probability distributions modeling the three-valve system, part 2
Table 1.5. Probability distributions of E1 states
Table 1.6. Probability distributions of E2 states
Table 1.7. Probability distributions of y states
2 Bayesian Network: Modeling Formalism of the Structure Function of Boolean Systems
Table 2.1. Probability distribution of valves’ states
Table 2.2. CPT of cut-set C2
Table 2.3. CPT of y based on cut-sets
Table 2.4. CPT of L1
Table 2.5. CPT of L2
Table 2.6. CPT of y|L1, L2
Table 2.7. Probability distribution on y state
Table 2.8. CPT of a Boolean AND
Table 2.9. CPT of a Boolean OR
Table 2.10. CPT of the inhibitor of E2 = x2 ∧ x3 by B1 in a bowtie model
Table 2.11. CPT of the inhibitor of Ip1 by B2 in a bowtie model
Table 2.12. CPT of a Boolean 2-out-of-3:G system
Table 2.13. CPT of the Ci variables
Table 2.14. CPT of y in a linear consecutive-2-out-of-5:G
Table 2.15. CPT of y in a linear consecutive-2-out-of-5:G
3 Bayesian Network: Modeling Formalism of the Structure Function of Multi-State Systems
Table 3.1. Multi-state L13 tie-set
Table 3.2. Multi-state L24 tie-set
Table 3.3. Multi-state L567 tie-set
Table 3.4. Results of the computation based on multi-state and tie-sets
Table 3.5. Multi-state C1 tie-set
Table 3.6. Multi-state C2 tie-set
Table 3.7. Multi-state C3 tie-set
Table 3.8. Multi-state C4 tie-set
Table 3.9. Results of the computation based on multi-state and cut-sets
Table 3.10. Variables in the IDEF0 model representing the flow F(i)
Table 3.11. Results of the computation based on the IDEF0 model
Table 3.12. Results of the computation based on the IDEF0 model Li variables
Table 3.13. Results of the computation based on the IDEF0 model Ii variables
Table 3.14. CPT of HSB efficiency
4 Dynamic Bayesian Networks: Integrating Environmental and Operating Constraints in Reliability Computation
Table 4.1. CPT defining the transition probability matrix of a MC
5 Dynamic Bayesian Networks: Integrating Reliability Computation in the Control System
Table 5.1. Failure rates of the actuators
Table 5.2. Paths linking the sources to the demand point
Table 5.3. Variables Computing the actuator Weighting
List of Illustrations
1 Bayesian Networks: a Modeling Formalism for System Dependability
Figure 1.1. Bayesian network model
Figure 1.2. Multi-state system with three valves
Figure 1.3. Multi-state three-valve system with two stages
2 Bayesian Network: Modeling Formalism of the Structure Function of Boolean Systems
Figure 2.1. RBD of the flow distribution system
Figure 2.2. BN model for three cut-sets
Figure 2.3. BN model of two minimal cut-sets
Figure 2.4. BN modeling the two minimal tie-sets
Figure 2.5. FT of the flow distribution system
Figure 2.6. BN model of the FT of Figure 2.5
Figure 2.7. BN model of a bowtie and its barriers
Figure 2.8. BN model of the 2-out-of-3:G system
Figure 2.9. BN model of the linear consecutive-2-out-of-5:G system
Figure 2.10. BN model of the circular consecutive-2-out-of-5:G system
Figure 2.11. Noisy-OR structures
Figure 2.12. Leaky Noisy-OR structures
Figure 2.13. Structuration in organizational level and action phases relating to a bowtie model
Figure 2.14. RB unified model of the power plant risk
3 Bayesian Network: Modeling Formalism of the Structure Function of Multi-State Systems
Figure 3.1. BN structured by the minimal multi-state tie-sets
Figure 3.2. Compact BN structured by minimal tie-sets for a multi-state system
Figure 3.3. BN based on the minimal cut-sets of a multi-state system
Figure 3.4. Generic definition of a function and its flows
Figure 3.5. Generic BN pattern of a function
Figure 3.6. Functional model of the system
Figure 3.7. Model of the function (transfer the fluid)
Figure 3.8. Model of the function (circulate the fluid)
Figure 3.9. Model of the function (stop the fluid)
Figure 3.10. BN model mapped from the functional model of the system
Figure 3.11. BN model of a human safety barrier (HSB)
4 Dynamic Bayesian Networks: Integrating Environmental and Operating Constraints in Reliability Computation
Figure 4.1. DBN model developed over eight time slices
Figure 4.2. DBN of a MC
Figure 4.3. DBN of a non-homogeneous MC
Figure 4.4. Inference in the DBN of a non-homogeneous MC
Figure 4.5. DBN model of a MSM
Figure 4.6. DBN model of an IOHMM
Figure 4.7. Inference in the DBN model of the IOHMM
Figure 4.8. Unroll up the DBN model without conditional dependence between components
Figure 4.9. Unroll up the DBN model with conditional dependence between components
Figure 4.10. 2TBN of a multi-state system
Figure 4.11. Inference of a 2TBN multi-state model and state probability distribution
Figure 4.12. Multi-state system and components’ reliability
Figure 4.13. 2TBN model of a multi-state system with largely dependent processes
5 Dynamic Bayesian Networks: Integrating Reliability Computation in the Control System
Figure 5.1. Control structure of an over-actuated system integrating a reliability model
Figure 5.2. Control framework of an over-actuated system integrating a DBN reliability model
Figure 5.3. Part of the Barcelona DWN studied
Figure 5.4. DBN model of the Barcelona DWN
Figure 5.5. Actuators and DWN reliability
Figure 5.6. Simulation of control inputs and weights of the Barcelona DWN
Systems Dependability Assessment Set
coordinated by
Jean-Francois Aubry
Volume 2
Benefits of Bayesian Network Models
Philippe Weber
Christophe Simon
logFirst published 2016 in Great Britain and the United States by ISTE Ltd and John Wiley & Sons, Inc.
Apart from any fair dealing for the purposes of research or private study, or criticism or review, as permitted under the Copyright, Designs and Patents Act 1988, this publication may only be reproduced, stored or transmitted, in any form or by any means, with the prior permission in writing of the publishers, or in the case of reprographic reproduction in accordance with the terms and licenses issued by the CLA. Enquiries concerning reproduction outside these terms should be sent to the publishers at the undermentioned address:
ISTE Ltd
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John Wiley & Sons, Inc.
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© ISTE Ltd 2016
The rights of Philippe Weber and Christophe Simon to be identified as the author of this work have been asserted by them in accordance with the Copyright, Designs and Patents Act 1988.
Library of Congress Control Number: 2016943665
British Library Cataloguing-in-Publication Data
A CIP record for this book is available from the British Library
ISBN 978-1-84821-992-2
Foreword by J.-F. Aubry
Systems Dependability Assessment is the title of a series of books, of which this is the third. The preface to the first series described the reasons why the authors embarked upon writing these books: in recent decades, they have made significant contributions to recent approaches to the predictive dependability of systems by considering concepts developed in other scientific fields but not yet applied to account of dependability. All these authors belong to the Automatic Control Research Center (CRAN, Centre de Recherches en Automatique de Nancy) of the