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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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Sarkar Tanmay,Salauddin Molla,Choudhury Tanupriya,Um Jung-Sup,Pati Siddhartha,Hazra Sudipta Kumar,Chakraborty Runu 대한공간정보학회 2021 Spatial Information Research Vol.29 No.4
Being a seasonal fruit mango cannot be cherished over the year; dehydration may be a solution to preserve the deliquesce of mango as mango leather. The processing parameters like puree load (0.4–0.6 g/cm2 ), total soluble solid (20–30 B), oven temperature (60–80 C), and microwave power level (100–300 W) were optimised for a superior textural attribute (hardness) primitive drying method like sun drying, industrially practiced modern methods like hot air oven drying and microwave drying and cutting-edge drying technique like freeze-drying. Response surface methodology and artificial neural network technique were adapted to model these drying procedures by considering the central composite design. The mathematical operations guiding to describe the model were studied. Being an imperative parameter colour quantification is essential for food industries. Current research employs microwave drying to produce mango leather with colour quantification approach. The L, ‘a’ and ‘b’ values of the product have been measured by Hunter Lab colorimeter and by digital image analysis, to determine the chromatic view harmonious to human vision. The relative analysis of colour measurement through these two techniques has been studied.
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