Results 251 to 260 of about 6,370,116 (297)

Gradient Systems and Asymmetric Relaxations in View of Riemannian Geometry. [PDF]

Entropy (Basel)
Bravetti A, García Ariza MÁ, Romero-Arias JR.   +2 more
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

A wavelet transform with point-symmetric extension at tile boundaries

IEEE Transactions on Image Processing, 2002
This paper presents a low-complexity wavelet transform that utilizes point-symmetric extension at the image tile boundaries. The proposed approach is considered as an alternative to the well-known symmetric signal extension in dealing with the boundary artifacts that manifest when tiles of images are lossy compressed. The new solution developed for odd-
Igor Kharitonenko, Xing Zhang, Sue Twelves   +2 more
openaire   +3 more sources

Robust symmetric iterative closest point

ISPRS Journal of Photogrammetry and Remote Sensing, 2022
Yongjun Zhang, Jiayuan Li, Qingwu Hu
exaly   +2 more sources

Optimal navigation in a planar time-varying point-symmetric flow-field

IEEE Conference on Decision and Control and European Control Conference, 2011
This paper is concerned with time-optimal navigation for flight vehicles in a planar, time-varying point-symmetric flow-field — such as inside vortices or regions of eddy-driven upwelling/downwelling—where the objective is to find the fastest trajectory between initial and final points.
L. Techy
openaire   +2 more sources

Point and interval forecasting system for crude oil price based on complete ensemble extreme-point symmetric mode decomposition with adaptive noise and intelligent optimization algorithm

Applied Energy, 2022
Stable and accurate prediction of crude oil prices is critical to national security, economic development, and even international relations, against the background of the COVID-19 and Russia–Ukraine war.
Xuerui Wang, Xiangyu Li, Shaoting Li
semanticscholar   +1 more source

A Point-Symmetric Graph that is Nowhere Reversible

SIAM Journal on Algebraic Discrete Methods, 1982
It is the purpose of this note to investigate the relationships among four concepts relating to symmetry in graphs: point-symmetry, line-symmetry, arc-symmetry and reversibility; especially which of the first three properties do not imply reversibility.
Harary, Frank, Vince, Andrew, Worley, Dale   +2 more
openaire   +2 more sources

Two-point symmetrization and convexity

Archiv der Mathematik, 2004
For a hyperplane \(H\) in \(\mathbb{R}^n\), let \(\sigma_H\) denote the reflection in \(H\), and let \(H^-\), \(H^+\) be the two closed halfspaces bounded by \(H\). The two-point-symmetrization with respect to \(H\) transforms a set \(A\subset \mathbb{R}^n\) into the set \[ ((A\cap \sigma_H A)\cap H^-)\cup((A\cup (\sigma_H A)\cap H^+).
Aubrun, Guillaume, Fradelizi, Matthieu
openaire   +1 more source

Decomposition of Bivariate Point-Symmetric Density Function

Calcutta Statistical Association Bulletin, 1998
For the analysis of contigency tables, it is known that the point-symmetry model holds if and only if both the quasi-point symmetry and the marginal point-symmetry models hold (Tomizawa, 1985). This paper shows that a similar decomposition for bivariate density function (instead of cell probabilities) holds.
Tomizawa, Sadao, Konuma, Tomono
openaire   +1 more source

Bracing effect of sheathing in point-symmetric cold-formed steel flexural members

Journal of constructional steel research, 2019
This paper presents an experimental investigation on sheathed cold-formed steel wall panels subjected to out-of-plane loading. The objective is to determine the two-sided gypsum sheathing effect on the design and behavior of the point-symmetric CFS studs.
S. Selvaraj, M. Madhavan
semanticscholar   +1 more source

Polychromatic MTF of electrostatic point symmetric electron lenses

Applied Optics, 1983
Electrostatic electron lenses have been evaluated in terms of their image transfer characteristics. The effect of polychromatic radiation with different spectral energy distributions on the performance of an electron emitter-lens combination has been studied.
O P, Nijhawan, S K, Gupta, R, Hradaynath
openaire   +2 more sources