Results 1 to 10 of about 38,959 (89)

Giant dynamic electromechanical response via field driven pseudo-ergodicity in nonergodic relaxors [PDF]

open access: yesNature Communications, 2023
Enhanced electromechanical response can commonly be found during the crossover from normal to relaxor ferroelectric state, making relaxors to be potential candidates for actuators.
He Qi   +5 more
doaj   +2 more sources

Robust Energy-Efficient Hybrid Beamforming Design for Massive MIMO LEO Satellite Communication Systems

open access: yesIEEE Access, 2022
In low earth orbit (LEO) satellite communication systems, the limited energy supply capacity and the difficulty in obtaining channel state information (CSI) are the practical challenges.
Yang Liu   +3 more
doaj   +1 more source

Eigenstructures of MIMO Fading Channel Correlation Matrices and Optimum Linear Precoding Designs for Maximum Ergodic Capacity

open access: yesEURASIP Journal on Advances in Signal Processing, 2007
The ergodic capacity of MIMO frequency-flat and -selective channels depends greatly on the eigenvalue distribution of spatial correlation matrices. Knowing the eigenstructure of correlation matrices at the transmitter is very important to enhance the ...
Bahrami Hamid Reza, Le-Ngoc Tho
doaj   +2 more sources

Dynamics via measurability

open access: yesAbstract and Applied Analysis, 2006
Generators f for σ-algebras can be used to view the dynamics of an invertible measurable transformation T in terms of the range values of f∘T. Such generators are the norm rather than the exception.
Svetlana Butler, Joseph Rosenblatt
doaj   +2 more sources

NaNbO3 modulated phase transition behavior and antiferroelectric stability evolution in 0.88(Bi0.5Na0.5)TiO3-0.12BaTiO3 lead-free ceramics

open access: yesJournal of Materiomics, 2022
Giant strains in (Bi0.5Na0.5)TiO3 based ceramics are usually attributed to electric field induced nonpolar to polar phase transition. Whether it is an ergodic relaxor R3c/P4mm ferroelectric (FE) to long-range ordered FE phase transformation or a ...
Yi Zhang   +6 more
doaj   +1 more source

Strong limit theorems for anisotropic self-similar fields

open access: yesModern Stochastics: Theory and Applications, 2014
Our paper starts from presentation and comparison of three definitions for the self-similar field. The interconnection between these definitions has been established.
V. Makogin, Yu. Mishura
doaj   +1 more source

Solutions of the Multivariate Inverse Frobenius–Perron Problem

open access: yesEntropy, 2021
We address the inverse Frobenius–Perron problem: given a prescribed target distribution ρ, find a deterministic map M such that iterations of M tend to ρ in distribution. We show that all solutions may be written in terms of a factorization that combines
Colin Fox   +2 more
doaj   +1 more source

Majorana scars as group singlets

open access: yesPhysical Review Research, 2023
In some quantum many-body systems, the Hilbert space breaks up into a large ergodic sector and a much smaller scar subspace. It has been suggested [K. Pakrouski et al., Phys. Rev. Lett.
Zimo Sun   +3 more
doaj   +1 more source

Symmetric Gibbs measures [PDF]

open access: yes, 1995
We prove that certain Gibbs measures on subshifts of finite type are nonsingular and ergodic for certain countable equivalence relations, including the orbit relation of the adic transformation (the same as equality after a permutation of finitely many ...
Petersen, Karl, Schmidt, Klaus
core   +4 more sources

Powers of the Stochastic Gompertz and Lognormal Diffusion Processes, Statistical Inference and Simulation

open access: yesMathematics, 2020
In this paper, we study a new family of Gompertz processes, defined by the power of the homogeneous Gompertz diffusion process, which we term the powers of the stochastic Gompertz diffusion process.
Eva María Ramos-Ábalos   +2 more
doaj   +1 more source

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