Results 11 to 20 of about 1,409,111 (296)

Geometric speed limit of neutrino oscillation [PDF]

open access: yes, 2021
We investigate geometric quantum speed limit of neutrino oscillations in a presence of matter and CP-violation. We show that periodicity in the speed limit present in an unperturbed system becomes damped by interaction with a normal matter and ...
Dajka, Jerzy   +3 more
core   +1 more source

A Periodicity Metric for Assessing Maintenance Strategies [PDF]

open access: yes, 2009
Organised by: Cranfield UniversityThe maintenance policy in manufacturing systems is devised to reset the machines functionality in an economical fashion in order to keep the products quality within acceptable levels.
ElMaraghy, H. A.   +2 more
core   +4 more sources

Periodicity-enhanced structures for efficient sound absorption [PDF]

open access: yes, 2016
In the present work, an overview of experimental investigations of the two types of periodicity-enhanced acoustic absorbing structures is given. In the first type of structures, the performance of acoustic absorbing materials is improved by providing a ...
Victor V. Krylov (1252356)   +1 more
core   +5 more sources

On Periodicity in Limit Sets [PDF]

open access: yesProceedings of the American Mathematical Society, 1967
The purpose of this paper is to give a necessary and sufficient condition in order that the S limit set of a point consists of exactly one periodic orbit which is both S-Lyapunov stable and S-asymptotically stable. The general reference for most terms used in this paper is [2]. In this paper we assume (X, T, r) is a transformation group.
openaire   +2 more sources

Limit periodic linear difference systems with coefficient matrices from commutative groups

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2014
In this paper, limit periodic and almost periodic homogeneous linear difference systems are studied. The coefficient matrices of the considered systems belong to a given commutative group.
Petr Hasil, Michal Veselý
doaj   +1 more source

Space-charge limit for an alternating-phase-focusing structure [PDF]

open access: yes, 1980
In a report titled Space-Charge Limit for a Drift-Tube Linac from the Stability Point of View of Longitudinal Periodicity, the author showed that the stability condition for the longitudinal periodicity gives one of the upper limits and sometimes a lower
Inagaki, S.
core   +1 more source

Quantum-Enhanced Optical Phase Estimation via Stochastic Optimization [PDF]

open access: yesEPJ Web of Conferences
We propose a self-guided quantum phase estimation protocol based on a squeezed vacuum state and a stochastic optimization algorithm. Our protocol dynamically aligns the measurement basis with the target phase, eliminating the need for prior knowledge of ...
Hasnaoui Hamza   +3 more
doaj   +1 more source

Phylogenetic differences in content and intensity of periodic proteins [PDF]

open access: yes, 2005
Many proteins exhibit sequence periodicity, often correlated with a visible structural periodicity. The statistical significance of such periodicity can be assessed by means of a chi-square-based test, with significance thresholds being calculated from ...
McEwan, N.R.   +3 more
core   +1 more source

A contraction approach to dynamic optimization problems.

open access: yesPLoS ONE, 2021
An infinite-horizon, multidimensional optimization problem with arbitrary yet finite periodicity in discrete time is considered. The problem can be posed as a set of coupled equations.
Leif K Sandal   +3 more
doaj   +1 more source

On the limit spectrum of a degenerate operator in the framework of periodic homogenization or singular perturbation problems

open access: yesComptes Rendus. Mathématique, 2022
In this paper we perform the analysis of the spectrum of a degenerate operator $A_\varepsilon $ corresponding to the stationary heat equation in a $\varepsilon $-periodic composite medium having two components with high contrast diffusivity.
Sili, Ali
doaj   +1 more source

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