Results 21 to 30 of about 51,079 (267)

A precise quaternion-based navigation algorithm for simulating signals of accelerometers and gyroscopes with low sample frequencies

open access: yesТехнічна інженерія, 2020
Accelerometers and gyroscopes based on MEMS technology are promising for tracing motion in medicine, sport activities, human-machine interaction, robotics and many other areas due to the fact that they are self-containing and have a range of other ...
T.A. Marusenkova
doaj   +1 more source

Solving 2D-Poisson equation using modified cubic B-spline differential quadrature method

open access: yesAin Shams Engineering Journal, 2018
In this study a modified cubic B-spline differential quadrature method (MCBDQM) is used to solve the two dimensional Poisson equation. Using the cubic B-spline functions, explicit expressions of weighting coefficients for approximation of derivatives are
Ahmed M. Elsherbeny   +3 more
doaj   +1 more source

Inverse problem of incomplete boundaries and unknown parameters in two-dimensional Poisson equation

open access: yesNantong Daxue xuebao. Ziran kexue ban, 2022
The inverse problem of Poisson equation with incomplete boundary or unknown parameters have been solved by using the method of fundamental solutions (MFS) and Kalman filtering technique.
WANG Yue; JIANG Quan
doaj   +1 more source

Screened Poisson Equation for Image Contrast Enhancement

open access: yesImage Processing On Line, 2014
In this work we propose a discussion and detailed implementation of a very simple gradient domain method that tries to eliminate the effect of nonuniform illumination and at the same time preserves the images details. This model, which to the best of our
Jean-Michel Morel   +2 more
doaj   +1 more source

The Poisson equation in homogeneous Sobolev spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
We consider Poisson's equation in an n-dimensional exterior domain G(n≥2) with a sufficiently smooth boundary. We prove that for external forces and boundary values given in certain Lq(G)-spaces there exists a solution in the homogeneous Sobolev space S2,
Tatiana Samrowski, Werner Varnhorn
doaj   +1 more source

Electrostatic pair-potentials based on the Poisson equation

open access: yesNew Journal of Physics, 2019
Electrostatic pair-potentials within molecular simulations are often based on empirical data, cancellation of derivatives or moments, or statistical distributions of image-particles.
B Stenqvist
doaj   +1 more source

Numerical Solution of the Poisson Equation in Polar Coordinates by the Method of Collocations and Least Residuals

open access: yesМоделирование и анализ информационных систем, 2015
A version of the method of collocations and least residuals is proposed for the numerical solution of the Poisson equation in polar coordinates on non-uniform grids.
E. V. Vorozhtsov, V. P. Shapeev
doaj   +1 more source

An enhanced XFEM for the discontinuous Poisson problem [PDF]

open access: yesArchive of Mechanical Engineering, 2019
In the paper, the extended finite element method (XFEM) is combined with a recovery procedure in the analysis of the discontinuous Poisson problem. The model considers the weak as well as the strong discontinuity.
Paweł Stąpór
doaj   +1 more source

A Fractional Finite Difference Method for Solving the Fractional Poisson Equation Based on the Shifted Grünwald Estimate

open access: yesWalailak Journal of Science and Technology, 2013
In this study a fractional Poisson equation is scrutinized through finite difference using the shifted Grünwald estimate. A novel method is proposed numerically.
Abdollah BORHANIFAR, Sohrab VALIZADEH
doaj   +1 more source

Post-Newtonian Jeans Equation for Stationary and Spherically Symmetrical Self-Gravitating Systems

open access: yesUniverse, 2022
The post-Newtonian Jeans equation for stationary self-gravitating systems is derived from the post-Newtonian Boltzmann equation in spherical coordinates. The Jeans equation is coupled with the three Poisson equations from the post-Newtonian theory.
Gilberto Medeiros Kremer
doaj   +1 more source

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