• Title/Summary/Keyword: Interval Arithmetics

Search Result 2, Processing Time 0.013 seconds

ON SOLVING FUZZY EQUATION

  • Hong, Dug-Hun
    • Journal of applied mathematics & informatics
    • /
    • v.8 no.1
    • /
    • pp.213-223
    • /
    • 2001
  • The use of fuzzy number over interval of confidence instead of possibilitic consideration for solving fuzzy equation is proposed. This approach of solving fuzzy equation by interval arithmetic and ${\alpha}$-cuts has a considerable advantage. Through theoretical analysis, an illustrative example and computational results, we show that the proposed approach is more general and straight-forword.

A Study on the Methodology of Qualitative Reasoning Using Centroid-Oriented Composite Interval (무게중심 복합구간에 의한 정성 추론 기법에 관한 연구)

  • 박천경;김성근
    • Transactions of the Korean Society of Mechanical Engineers
    • /
    • v.16 no.7
    • /
    • pp.1351-1362
    • /
    • 1992
  • Qualitative models in model-based expert system needs modeling paradigm which provides intelligent control of modeling assumptions and extracts robust inferences without quantitative information about the system to be modeled. Qualitative reasoning methodologies has proved the property of the completeness but not the soundness to the corresponding quantitative model. We propose new methodology of qualitative reasoning by introducing the concept of Centroid-Oriented Composite Interval to improve the soundness problem. Arithmetic operations and equivalence classes were composed using this definition. Qualitative simulation results were compared to Kuipers's results and the improvements in the soundness problem is verified.