This is the publication list of Dr. Behrouz Homayoun Far.
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   Research Doc. 1990-01
Authors(s): Behrouz H. Far,
Title:
``Modeling and Analysis of Rule-based Control Systems Based on Qualitative Reasoning and Symbol Structures'' (定性推論と記号構造に基づくルールベース制御システムのモデル化と解析),
Transactions/Magazines/Conferences:
Ph.D. Thesis, Graduate School of Science and Technology, Chiba University, Japan, p. 192, 1990.
Abstract
Original Language: English
 


 
   Research Doc. 1990-02 Click to download PDF version
Authors(s): Behrouz H. Far, M. Nakamichi and M. Sampei,
Title:
"Automatic Diagnostic Rule Generation for Rule-based Controllers by Qualitative Sensitivity Analysis,"
Transactions/Magazines/Conferences:
Transactions of Electerical Engineering Society (電気学会学会誌), vol.110.c, no. 10, pp. 661-669, October 1990.
Abstract
We introduce the Qualitative Sensitivity Analysis (QSA) technique and its application to generate automatically diagnostic rules for systems modeled in rule based causal format. The rule set is composed of atomic propositions. First, we introduce the Modified Causal Ordering (MCO) technique to derive ordering among the propositions. The result of MCO are complete subsets of propositions and Ordinal Reachability Graph (ORG). Each complete subset is identified by its ranking code. In QSA, propositions stand for the landmarks of the qualitative variables. QSA begins with the ORG and replaces the propositions with their equivalent landmarks. Perturbation is modeled by forcing a landmark to shift to its neighboring landmark. Sensitivity is defined as a consequence of perturbation, forcing two or more of the landmarks of a variable having the same rank. QSA can derive the sensitivity of the higher rank landmark due to perturbation affecting the lower rank ones. Applicability of the method is demonstrated through an example.
Original Language: English
 


 
   Research Doc. 1990-03
Authors(s): Behrouz H. Far and M. Nakamichi,
Title:
``Qualitative Performance Evaluation of Rule-based Controllers by Qualitative Sensitivity Analysis,''
Transactions/Magazines/Conferences:
Proc. Int. Conf. on Control and Modeling, ICCM' 90, Tehran, Iran, August 1990, pp. 364-370.
Abstract
Original Language: English
 


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