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        Wavelet operator for multiscale modeling of a nuclear reactor

        Vineet Vajpayee,Siddhartha Mukhopadhyay,Akhilanand Pati Tiwari 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.5

        This article introduces a methodology of designing a wavelet operator suitable for multiscale modeling. The operator matrix transforms states of a multivariable system onto projection space. In addition, itimposes a specific structure on the system matrix in a multiscale environment. To be specific, the articledeals with a diagonalizing transform that is useful for decoupled control of a system. It establishes thatthere exists a definite relationship between the model in the measurement space and that in the projectionspace. Methodology for deriving the multirate perfect reconstruction filter bank, associated withthe wavelet operator, is presented. The efficacy of the proposed technique is demonstrated by modelingthe point kinetics nuclear reactor. The outcome of the multiscale modeling approach is compared withthat in the single-scale approach to bring out the advantage of the proposed method.

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