Results 11 to 20 of about 145,652 (224)

Modular Single-Stage Three-Phase Flyback Differential Inverter for Medium/High-Power Grid Integrated Applications

open access: yesSensors, 2022
This paper proposes a single-stage three-phase modular flyback differential inverter (MFBDI) for medium/high power solar PV grid-integrated applications.
Ahmed Ismail M. Ali   +4 more
doaj   +1 more source

Numerical Approach of the Equilibrium Solutions of a Global Climate Model

open access: yesMathematics, 2020
We consider a coupled model surface-deep ocean effect, where an Energy Balance Model (EBM) is used for modelling the surface temperature and a two-dimensional heat equation represents the evolution of the temperature of the deep ocean. Although the model
Arturo Hidalgo, Lourdes Tello
doaj   +1 more source

Divergence-Free Adaptive Mesh Refinement for Magnetohydrodynamics [PDF]

open access: yes, 2001
In this paper we present a full-fledged scheme for the second order accurate, divergence-free evolution of vector fields on an adaptive mesh refinement (AMR) hierarchy. We focus here on adaptive mesh MHD.
Balsara   +45 more
core   +2 more sources

Influence of variable particle size reinforcement on mechanical and wear properties of alumina reinforced 2014Al alloy particulate composite [PDF]

open access: yesFME Transactions, 2020
Al2O3 may be the most important reinforcement in aluminum-based composites that are rising quickly in modern years. The significance of this paper is to study the influence of Al2O3p size variation (i.e. 53 µm and 88 µm) and content (i.e. 9, 12, and 15Wt
Bharath V.   +3 more
doaj  

Effect of mechanical alloying on sinterability and phase evolution in pressure-less sintered TiB2‒TiC ceramics

open access: yesJournal of Materiomics, 2019
Phase relation and microstructure evolution in the pressure-less sintered TiB2‒TiC ceramics preceded with mechanical alloying were systematically studied by a combination of SEM analysis. WC debris from milling balls promotes sintering by dissolving into
Tian-Yi Hu   +4 more
doaj   +1 more source

Sign changes in linear combinations of derivatives and convolutions of Polya frequency functions

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1979
We obtain upper bounds on the number of sign changes of linear combinations of derivatives and convolutions of Polya frequency functions using the variation diminishing properties of totally positive functions.
Steven Nahmias, Frank Proschan
doaj   +1 more source

Bell-shaped nonstationary refinable ripplets [PDF]

open access: yes, 2015
We study the approximation properties of the class of nonstationary refinable ripplets introduced in \cite{GP08}. These functions are solution of an infinite set of nonstationary refinable equations and are defined through sequences of scaling masks that
Pitolli, Francesca
core   +2 more sources

Consistent Weighted Average Flux of Well-Balanced TVD-RK Discontinuous Galerkin Method for Shallow Water Flows

open access: yesModelling and Simulation in Engineering, 2015
A well-balanced scheme with total variation diminishing Runge-Kutta discontinuous Galerkin (TVD-RK DG) method for solving shallow water equations is presented.
Thida Pongsanguansin   +2 more
doaj   +1 more source

Numerical analysis of a robust free energy diminishing Finite Volume scheme for parabolic equations with gradient structure [PDF]

open access: yes, 2016
We present a numerical method for approximating the solutions of degenerate parabolic equations with a formal gradient flow structure. The numerical method we propose preserves at the discrete level the formal gradient flow structure, allowing the use of
Cancès, Clément, Guichard, Cindy
core   +6 more sources

Time-causal and time-recursive spatio-temporal receptive fields [PDF]

open access: yes, 2015
We present an improved model and theory for time-causal and time-recursive spatio-temporal receptive fields, based on a combination of Gaussian receptive fields over the spatial domain and first-order integrators or equivalently truncated exponential ...
Lindeberg, Tony
core   +2 more sources

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