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Comprehensive fidelity evaluation for visual simulation based on catastrophe theory and trapezoidal fuzzy numbers |
School of Marine Science and Technology, Northwestern Polytechnical University, Xi′an, Shaanxi 710072, China |
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Abstract To solve the difficulty of giving consideration to fuzziness and subjectivity in fidelity evaluation of ocean visual simulation, a novel method was proposed based on catastrophe theory and trapezoidal fuzzy numbers. According to the establishment principles of visual simulation and marine battlefield environment characteristics, a set of quantitative and qualitative indicators with 4-level were established. The catastrophe theory dynamic comprehensive decisionmaking model was proposed based on trapezoidal fuzzy numbers. The trapezoidal fuzzy numbers were used to initialize the lowestlevel indicators, and the normalization formula of catastrophe theory was used to determine the weight of the corresponding indicator. The proposed model was applied in three typical ocean battlefield simulation system. The experimental results show that the ocean visual simulation fidelity assessment can be reasonably and correctly realized by the proposed method to provide a new perspective for multiple attribute decisionmaking in large and complex systems.
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Received: 20 March 2013
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