Results 1 to 10 of about 2,120,250 (297)

A Supervised Approach for Estimating Fractional Abundances of Binary Intimate Mixtures

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
In this work, we propose a supervised framework for spectral unmixing of binary intimate mixtures. The core idea is based on geodesic distance measurements and regression to estimate the fractional abundances.
Bikram Koirala, Behnood Rasti, Paul Scheunders   +2 more
doaj   +1 more source

Separating the effect of respiration from the heart rate variability for cases of constant harmonic breathing

Current Directions in Biomedical Engineering, 2015
Heart Rate Variability studies are a known measure for the autonomous control of the heart rate. In special situations, its interpretation can be ambiguous, since the respiration has a major influence on the heart rate variability. For this reason it has
Kircher Michael, Lenis Gustavo, Dössel Olaf   +2 more
doaj   +1 more source

Sound Visualization Demonstrates Velopharyngeal Coupling and Complex Spectral Variability in Asian Elephants. [PDF]

Animals (Basel), 2022
Beeck VC, Heilmann G, Kerscher M, Stoeger AS.   +3 more
europepmc   +1 more source

Spectral Learning of Latent-Variable PCFGs.

, 2012
We introduce a spectral learning algorithm for latent-variable PCFGs (Petrov et al., 2006). Under a separability (singular value) condition, we prove that the method provides consistent parameter estimates.
Cohen, Shay B., Stratos, Karl, Collins, Michael, Foster, Dean P., Ungar, Lyle   +4 more
openaire   +2 more sources

Correlated Temporal and Spectral Variability [PDF]

AIP Conference Proceedings, 2007
The variability of neutron star and black hole X‐ray sources has several dimensions, because of the roles played by different important time‐scales. The variations on time scales of hours, weeks, and months, ranging from 50% to orders of magnitude, arise out of changes in the flow in the disk.
openaire   +1 more source

Investigating Abiotic Sources of Spectral Variability From Multitemporal Hyperspectral Airborne Acquisitions Over the French Guyana Canopy

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Classifiers trained on airborne hyperspectral imagery are proficient in identifying tree species in hyperdiverse tropical rainforests. However, spectral fluctuations, influenced by intrinsic and environmental factors, such as the heterogeneity of ...
Colin Prieur, Antony Laybros, Giovanni Frati, Daniel Schlapfer, Jocelyn Chanussot, Gregoire Vincent   +5 more
doaj   +1 more source

Spectral Variability in Seyfert Galaxies [PDF]

Symposium - International Astronomical Union, 1987
Recent observations of spectral variability in active galactic nuclei have established the connection between the broad emission-line and optical continuum flux changes. The inferred size of the broad-line region is at least an order of magnitude smaller than conventional estimates based on photoionization models, which leads to new conclusions about ...
openaire   +1 more source

The Relation between Simulated Multiwavelength Blazar Variability and Stochastic Fluctuations

The Astrophysical Journal
Blazars exhibit multiwavelength variability, a phenomenon whose underlying mechanisms remain elusive. This study investigates the origin of such variability through leptonic blazar emission simulations, focusing on stochastic fluctuations in ...
Hannes Thiersen, Michael Zacharias, Markus Böttcher   +2 more
doaj   +1 more source

Advancements in solar spectral irradiance measurements by the TSIS-1 spectral irradiance monitor and its role for long-term data continuity

Journal of Space Weather and Space Climate
The first implementation of NASA’s Total and Spectral Solar Irradiance Sensor (TSIS-1) launched on December 15th, 2017, and was integrated into the International Space Station (ISS) to measure both the total solar irradiance (TSI) and the solar spectral ...
Richard Erik, Coddington Odele, Harber Dave, Chambliss Michael, Penton Steven, Brooks Keira, Charbonneau Luke, Peck Courtney, Béland Stéphane, Pilewskie Peter, Woods Tom   +10 more
doaj   +1 more source

Spectral Variability of Romano's Star

, 2010
accepted for publication in RevMexAA; 19 pages, 6 tables, 6 ...
Maryeva, O., Abolmasov, P.
openaire   +2 more sources