ASHISH PANDEY - Profile on Academia.edu (original) (raw)
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Papers by ASHISH PANDEY
Modelling and Simulation of Power Factor Corrected AC-DC Converters
… Journal of Electrical …, 2004
The focus of the present work is on introducing the power electronics community to the modelling ... more The focus of the present work is on introducing the power electronics community to the modelling and simulation of power factor corrected (PFC) converters. These techniques not only help to develop a deeper understanding of these converters but also to evaluate performance and feasibility of control strategies and topological features without fabrication of an actual system. Important PFC converter topologies
In this study, an investigation has been made to study the spatial and temporal variability of pr... more In this study, an investigation has been made to study the spatial and temporal variability of precipitation at 45 districts of the Madhya Pradesh (MP), India over the period of 102 years (1901–2002) on annual and seasonal basis. Mann–Kendall test and Sen's slope estimator test were used to detect monotonic trend direction and magnitude of change over time on annual and seasonal basis. The cumulative deviations and Pettit-Mann–Whitney test were applied to detect possible change points. Change in percentage was discussed in terms of percentage change over mean. To explore the spatial distribution of trends, linear regression value of each station was interpolated using ArcGIS 9.3 on seasonal and annual basis. Mean annual precipitation varied from 694 mm (at Westnimar) to 1416 mm (at Mandla). Maximum decrease in annual precipitation was found at Balaghat (− 11.99%) and minimum at Shahdol (− 8.52%) district. The most probable year of change was 1978 in annual precipitation. Change...
Studies in Applied Mathematics
We propose a shallow water model which combines the dispersion relation of water waves and the Bo... more We propose a shallow water model which combines the dispersion relation of water waves and the Boussinesq equations, and which extends the Whitham equation to permit bidirectional propagation. We establish that its sufficiently small, periodic wave train is spectrally unstable to long wavelength perturbations, provided that the wave number is greater than a critical value, like the Benjamin-Feir instability of a Stokes wave. We verify that the associated linear operator possesses infinitely many collisions of purely imaginary eigenvalues, but they do not contribute to instability away from the origin in the spectral plane to the leading order in the amplitude parameter. We discuss the effects of surface tension on the modulational instability. The results agree with those from formal asymptotic expansions and numerical computations for the physical problem.
Modelling and Simulation of Power Factor Corrected AC-DC Converters
… Journal of Electrical …, 2004
The focus of the present work is on introducing the power electronics community to the modelling ... more The focus of the present work is on introducing the power electronics community to the modelling and simulation of power factor corrected (PFC) converters. These techniques not only help to develop a deeper understanding of these converters but also to evaluate performance and feasibility of control strategies and topological features without fabrication of an actual system. Important PFC converter topologies
In this study, an investigation has been made to study the spatial and temporal variability of pr... more In this study, an investigation has been made to study the spatial and temporal variability of precipitation at 45 districts of the Madhya Pradesh (MP), India over the period of 102 years (1901–2002) on annual and seasonal basis. Mann–Kendall test and Sen's slope estimator test were used to detect monotonic trend direction and magnitude of change over time on annual and seasonal basis. The cumulative deviations and Pettit-Mann–Whitney test were applied to detect possible change points. Change in percentage was discussed in terms of percentage change over mean. To explore the spatial distribution of trends, linear regression value of each station was interpolated using ArcGIS 9.3 on seasonal and annual basis. Mean annual precipitation varied from 694 mm (at Westnimar) to 1416 mm (at Mandla). Maximum decrease in annual precipitation was found at Balaghat (− 11.99%) and minimum at Shahdol (− 8.52%) district. The most probable year of change was 1978 in annual precipitation. Change...
Studies in Applied Mathematics
We propose a shallow water model which combines the dispersion relation of water waves and the Bo... more We propose a shallow water model which combines the dispersion relation of water waves and the Boussinesq equations, and which extends the Whitham equation to permit bidirectional propagation. We establish that its sufficiently small, periodic wave train is spectrally unstable to long wavelength perturbations, provided that the wave number is greater than a critical value, like the Benjamin-Feir instability of a Stokes wave. We verify that the associated linear operator possesses infinitely many collisions of purely imaginary eigenvalues, but they do not contribute to instability away from the origin in the spectral plane to the leading order in the amplitude parameter. We discuss the effects of surface tension on the modulational instability. The results agree with those from formal asymptotic expansions and numerical computations for the physical problem.