Results 1 to 10 of about 9,414,523 (185)

Spin cross-correlation experiments in an electron entangler. [PDF]

open access: yesNature, 2022
Correlations are fundamental in describing many-body systems. However, in experiments, correlations are notoriously difficult to assess on a microscopic scale, especially for electron spins.
A. Bordoloi   +4 more
semanticscholar   +1 more source

2D/3D Multimode Medical Image Registration Based on Normalized Cross-Correlation

open access: yesApplied Sciences, 2022
Image-guided surgery (IGS) can reduce the risk of tissue damage and improve the accuracy and targeting of lesions by increasing the surgery’s visual field.
Shan Liu   +5 more
semanticscholar   +1 more source

The Cross-correlation Structure of Tehran Stock Exchange Indexes by Multifractal Detrended Fluctuation Analysis [PDF]

open access: yesتحقیقات مالی, 2012
One of the latest approaches for analyzing the coupled time series is MF-DXA. This technique has been used in many disciplines such as finance. In this paper, we have analyzed Tehran Stock Exchange indexes by MF-DXA and have found a scaling behavior ...
Reza Tehrani   +2 more
doaj   +1 more source

A Novel Cross-Correlation Algorithm Based on the Differential for Target Detection of Passive Radar

open access: yesRemote Sensing, 2022
For the problem of traditional passive radar target detection, the cross-correlation method is a popular solution. By processing the reference signal and the target echo signal coherently, the method is able to extract the target parameters, such as ...
Dawei Zhao   +3 more
doaj   +1 more source

An optimization method of observation matrix based on QR decomposition

open access: yesDianzi Jishu Yingyong, 2021
In compressed sensing theory, the most critical issue is the construction of the observation matrix. The factors that affect the image reconstruction quality include the independence between the observation matrix column vectors and the cross-correlation
Zhou Qibin, Wu Jing, Yu Bo
doaj   +1 more source

Temporal Relationship between Daily Reports of COVID-19 Infections and Related GDELT and Tweet Mentions

open access: yesGeographies, 2023
Social media platforms are valuable data sources in the study of public reactions to events such as natural disasters and epidemics. This research assesses for selected countries around the globe the time lag between daily reports of COVID-19 cases and ...
Innocensia Owuor, Hartwig H. Hochmair
doaj   +1 more source

Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14 [PDF]

open access: yesAstronomy & Astrophysics, 2019
We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift z = 2.35 from the three-dimensional correlation of Lyman-α (Lyα) forest absorption and quasars. The study uses 266 590 quasars in the redshift range 1.77 <  z <  3.5 from
M. Blomqvist   +17 more
semanticscholar   +1 more source

The Vegetation–Climate System Complexity through Recurrence Analysis

open access: yesEntropy, 2021
Multiple studies revealed that pasture grasslands are a time-varying complex ecological system. Climate variables regulate vegetation growing, being precipitation and temperature the most critical driver factors.
Andrés F. Almeida-Ñauñay   +4 more
doaj   +1 more source

Retrieving Temperatures and Abundances of Exoplanet Atmospheres with High-resolution Cross-correlation Spectroscopy [PDF]

open access: yesAstronomical Journal, 2018
High-resolution spectroscopy (R ≥ 25,000) has recently emerged as one of the leading methods for detecting atomic and molecular species in the atmospheres of exoplanets.
M. Brogi, M. Line
semanticscholar   +1 more source

CMB lensing reconstruction biases in cross-correlation with large-scale structure probes [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2019
The cross-correlation between cosmic microwave background (CMB) gravitational lensing and large-scale structure tracers will be an important cosmological probe in the coming years. Quadratic estimators provide a simple and powerful (if suboptimal) way to
G. Fabbian, A. Lewis, D. Beck
semanticscholar   +1 more source

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