Qualitative data modeling: application of a mechanism for interpreting graphical data |
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Authors: | Sheila A. McIlraith |
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Affiliation: | Advanced Technologies Department, Alberta Research Council, 6815 8th Street N. E., Calgary, Alta., Canada T2E 7H7 |
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Abstract: | This paper describes a qualitative technique for interpreting graphical data. Given a set of numerical observations regarding the behaviour of a system, its attributes can be determined by plotting the data and qualitatively comparing the shape of the resulting graph with graphs of system behaviour models. Qualitative data modeling incorporates techniques from pattern recognition and qualitative reasoning to characterize observed data, generate hypothetical interpretations, and select models that best fit the shape of the data. Domain-specific knowledge may be used to substantiate or refute the likelihood of hypothesized interpretations. The basic data modeling technique is domain independent and is applicable to a wide range of problems. It is illustrated here in the context of a knowledge-based system for well test interpretation. |
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Keywords: | qualitative reasoning pattern recognition data interpretation well testing raisonnement qualitatif reconnaissance des formes interprétation de données test de puits |
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