Results 21 to 30 of about 573,666 (268)

Groundstate for the Schrödinger-Poisson-Slater equation involving the Coulomb-Sobolev critical exponent

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we study the existence of ground state solutions for the Schrödinger-Poisson-Slater type equation with the Coulomb-Sobolev critical growth: −Δu+14π∣x∣∗∣u∣2u=∣u∣u+μ∣u∣p−2u,inR3,-\Delta u+\left(\frac{1}{4\pi | x| }\ast | u{| }^{2}\right)u=|
Lei Chunyu, Lei Jun, Suo Hongmin
doaj   +1 more source

Ground-state Dirac monopole [PDF]

open access: yesPhysical Review A, 2011
We show theoretically that a monopole defect, analogous to the Dirac magnetic monopole, may exist as the ground state of a dilute spin-1 Bose-Einstein condensate. The ground-state monopole is not attached to a single semi-infinite Dirac string, but forms a point where the circulation of a single vortex line is reversed.
Ruokokoski, E.   +3 more
openaire   +4 more sources

Robust Wideband Interference Suppression Method for GNSS Array Antenna Receiver via Hybrid Beamforming Technique

open access: yesRemote Sensing
Global navigation satellite system (GNSS) array antenna receivers are widely used to suppress wideband interference in navigation countermeasures. However, existing array antenna receivers all adopt a digital array structure and digital beamforming ...
Zhenxing Xu   +9 more
doaj   +1 more source

Singular Mean-Field States: A Brief Review of Recent Results

open access: yesCondensed Matter, 2020
This article provides a focused review of recent findings which demonstrate, in some cases quite counter-intuitively, the existence of bound states with a singularity of the density pattern at the center; the states are physically meaningful because ...
Elad Shamriz   +3 more
doaj   +1 more source

Entanglement energetics in the ground state [PDF]

open access: yesJournal of Modern Optics, 2004
We show how many-body ground state entanglement information may be extracted from sub-system energy measurements at zero temperature. A precise relation between entanglement and energy fluctuations is demonstrated in the weak coupling limit. Examples are given with the two-state system and the harmonic oscillator, and energy probability distributions ...
Jordan, Andrew N., Buttiker, Markus
openaire   +2 more sources

A Broadband Shared-Aperture L/S/X-Band Dual-Polarized Antenna for SAR Applications

open access: yesIEEE Access, 2019
This paper presents a novel tri-band antenna with dual polarizations and shared aperture. The proposed antenna operates at L-, S-, and X-bands with an approximate frequency ratio of 1:1.9:5.5.
Ke Li, Tao Dong, Zhenghuan Xia
doaj   +1 more source

NEWLY-DEVELOPED HYBRID ‘LADUSHKA’

open access: yesОвощи России, 2017
The aim of our research was to study the combinational ability of gynomonoecious form and to assess the best hybrid combinations for agriculturally valuable traits.
V. I. Donskaya, K. E. Diutin
doaj   +1 more source

Spectral Clustering-Based Controller Placement Approach in Low-Earth-Orbit Satellite Networks

open access: yesSpace: Science & Technology
Because of their low latency, cost-effective construction, and rapid product updating, low-Earth-orbit (LEO) satellite networks have become an important part of the space infrastructure system.
Shuotong Wei   +5 more
doaj   +1 more source

PROMISING TOMATO CULTIVARS SUITABLE FOR MECHANIZED HARVESTING AND TRANSPORTATION

open access: yesОвощи России, 2017
The most part of tomatoes cultivated in Astrakhan oblast are transported in industrial centers of Russian Federation. Introduction of new cultivars suitable for mechanized harvesting and transportation has a considerable significance for tomato ...
V. I. Donskaya, N. K. Katakaev
doaj   +1 more source

Network Resource Allocation Method Based on Awareness–Prediction Joint Compensation for Low-Earth-Orbit Satellite Networks

open access: yesApplied Sciences
With the continuous expansion of low-Earth-orbit (LEO) satellite networks, the services within these networks have exhibited diverse and differentiated demand characteristics. Due to the limited onboard resources, efficient network resource allocation is
Hang Di   +5 more
doaj   +1 more source

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