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2012 | 22 | 1 | 41-53
Tytuł artykułu

Signed directed graph based modeling and its validation from process knowledge and process data

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
This paper is concerned with the fusion of information from process data and process connectivity and its subsequent use in fault diagnosis and process hazard assessment. The Signed Directed Graph (SDG), as a graphical model for capturing process topology and connectivity to show the causal relationships between process variables by material and information paths, has been widely used in root cause and hazard propagation analysis. An SDG is usually built based on process knowledge as described by piping and instrumentation diagrams. This is a complex and experience-dependent task, and therefore the resulting SDG should be validated by process data before being used for analysis. This paper introduces two validation methods. One is based on cross-correlation analysis of process data with assumed time delays, while the other is based on transfer entropy, where the correlation coefficient between two variables or the information transfer from one variable to another can be computed to validate the corresponding paths in SDGs. In addition to this, the relationship captured by data-based methods should also be validated by process knowledge to confirm its causality. This knowledge can be realized by checking the reachability or the influence of one variable on another based on the corresponding SDG which is the basis of causality. A case study of an industrial process is presented to illustrate the application of the proposed methods.
Rocznik
Tom
22
Numer
1
Strony
41-53
Opis fizyczny
Daty
wydano
2012
otrzymano
2011-01-18
poprawiono
2011-07-20
Twórcy
autor
  • Department of Chemical and Materials Engineering, University of Alberta, 7th Floor, ECERF, 9107 116 Street, Edmonton, AB T6G 2G6, Canada
  • Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Automation, Tsinghua University, 1 Tsinghuayuan, Haidian District, Beijing 100084, China
  • Department of Chemical and Materials Engineering, University of Alberta, 7th Floor, ECERF, 9107 116 Street, Edmonton, AB T6G 2G6, Canada
autor
  • Tsinghua National Laboratory for Information Science and Technology (TNList), Department of Automation, Tsinghua University, 1 Tsinghuayuan, Haidian District, Beijing 100084, China
Bibliografia
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Typ dokumentu
Bibliografia
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Identyfikator YADDA
bwmeta1.element.bwnjournal-article-amcv22i1p41bwm
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