Results 11 to 20 of about 106,631 (202)

Degree of coherence

open access: yesPhysica, 1958
A new simple definition of the degree of coherence is proposed from which a previously proved theorem, also used as a definition, can easily be derived.
Cittert, P.H. van
openaire   +3 more sources

Robust far-field imaging by spatial coherence engineering

open access: yesOpto-Electronic Advances, 2021
The degree of coherence (DOC) function that characterizes the second-order correlations at any two points in a light field is shown to provide a new degree of freedom for carrying information.
Yonglei Liu   +5 more
doaj   +1 more source

EEG effective connectivity networks for an attentive task requiring vigilance based on dynamic partial directed coherence [PDF]

open access: yesJournal of Integrative Neuroscience, 2020
An effective network perspective focused on measuring directional interactions of electroencephalographic in different cortical regions during a sustained attentive task requiring vigilance.
Songyun Xie, Yabing Li
doaj   +1 more source

Propagation Properties of Gaussian Schell-Model Beam Array in the Jet Engine Exhaust Induced Turbulence

open access: yesIEEE Photonics Journal, 2020
The effects of the jet engine turbulence on a Gaussian Schell-Model (GSM) beam array propagating in a jet engine plume are studied theoretically. The analytical expressions of the cross-spectral density (CSD) function, the spectral degree of coherence ...
Yuqiu Zhang   +6 more
doaj   +1 more source

Coherence of vortex pseudo-Bessel beams in turbulent atmosphere [PDF]

open access: yesКомпьютерная оптика, 2019
Theoretical research of coherent properties of vortex conic waves propagating in a turbulent atmosphere was developed. The analysis was based on the analytical solution of the equation for the transverse second-order mutual coherence function of a light ...
Igor Lukin
doaj   +1 more source

Investigation of coherence properties of white light emission of tungsten lamp additionally excited with laser radiation

open access: yesAIP Advances, 2021
The coherence properties of white light emission of a tungsten incandescent lamp additionally excited with laser radiation are investigated. The degree of spatial coherence is determined from measurements of the contrast of interference fringe patterns ...
T. Hanulia   +3 more
doaj   +1 more source

Coherence, purity and correlation for superconducting charge qubits

open access: yesResults in Physics, 2023
In a model consisting of two superconducting charge qubits (SC-Qs), we study how the Josephson energy (JE) and temperature have an influence on the coherence, the degree of mixedness, and the nonclassical correlation.
K. Berrada, S. Abdel-Khalek, M. Algarni
doaj   +1 more source

Coherence optimised subarray partition for hybrid MIMO phased array radar

open access: yesIET Microwaves, Antennas & Propagation, 2021
Hybrid MIMO phased array radar (HMPAR) is widely recognized in the research of radar systems owing to its capacity to provide a balance or trade‐off between transmit coherent gain and waveform diversity gain.
Xia Li, Buhong Wang
doaj   +1 more source

Why There Cannot be a Single Probabilistic Measure of Coherence [PDF]

open access: yes, 2005
Bayesian Coherence Theory of Justification or, for short, Bayesian Coherentism, is characterized by two theses, viz. (i) that our degree of confidence in the content of a set of propositions is positively affected by the coherence of the set, and (ii ...
Bovens, Luc   +2 more
core   +1 more source

Paragraph-oriented methods for determining the coherence and thematic unity of scientific and technical texts

open access: yesРадіоелектронні і комп'ютерні системи, 2023
The subject of the article is to determine the degree of scientific and technical text connectedness using statistical calculations. The aim of the scientific investigation is to study the possibilities of using the coherence of fluctuations in the ...
Ihor Shevchenko   +3 more
doaj   +1 more source

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