Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Expert system reasoning about dynamic systems by semi-quantitative simulation.

L E Widman1

  • 1Division of Cardiology, University of Texas Health Science Center San Antonio 78284.

Computer Methods and Programs in Biomedicine
|June 1, 1989
PubMed
Summary

This study introduces a symbolic extension to system dynamics modeling for complex, dynamic systems. The enhanced method allows for semi-quantitative "what if" analyses, improving knowledge representation and expert system development.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Development and validation of an ECG algorithm for identifying accessory pathway ablation site in Wolff-Parkinson-White syndrome.

Journal of cardiovascular electrophysiology·1998
Same author

Requests for medical advice from patients and families to health care providers who publish on the World Wide Web.

Archives of internal medicine·1997
Same author

Validation of the EINTHOVEN model-based computerized electrocardiogram rhythm analysis system with three classes of clinical arrhythmias.

The American journal of cardiology·1996
Same author

Role of the tricuspid annulus and the eustachian valve/ridge on atrial flutter. Relevance to catheter ablation of the septal isthmus and a new technique for rapid identification of ablation success.

Circulation·1996
Same author

EINTHOVEN and tolerance for human error: design issues in a decision support system for cardiac arrhythmia interpretation.

Proceedings : a conference of the American Medical Informatics Association. AMIA Fall Symposium·1996
Same author

Automated analysis of intracardiac electrograms obtained during extrastimulus tests using a three-dimensional electrophysiology model.

Journal of electrocardiology·1996

Area of Science:

  • Computational modeling
  • Systems science
  • Artificial intelligence

Background:

  • Current symbolic knowledge representation methods struggle with complex, dynamic systems, especially with incomplete quantitative data.
  • Time-varying systems and feedback loops present significant challenges for traditional modeling techniques.

Purpose of the Study:

  • To present a symbolic extension of the system dynamics method for semi-quantitative "what if" analysis of complex dynamic systems.
  • To bridge the gap between mathematical descriptions and symbolic causal inference for dynamic systems.

Main Methods:

  • Definition of generic model building blocks mapping to difference equations.
  • Development of symbolic causal models using building blocks, semi-quantitative parameters, and default values.

Related Experiment Videos

  • Automatic translation to first-order difference equations and numerical integration.

    • Main Results:

    • A novel method for semi-quantitative analysis of dynamic systems is demonstrated.
    • The approach successfully models the human cardiovascular system using semi-quantitative parameters.
    • The method integrates mathematical and symbolic causal inference using a unified knowledge base.

    Conclusions:

    • The symbolic extension of system dynamics enhances truth maintenance, knowledge acquisition, and explanation.
    • This approach is valuable for expert system development in time-varying and homeostatic domains.
    • It offers a powerful tool for understanding and simulating complex biological and other dynamic systems.