Results 1 to 10 of about 2,181,379 (230)
Anharmonic Evolution of the Cosmic Axion Density Spectrum [PDF]
Physical Review D, 1994 We present analytic solutions to the spatially homogeneous axion field equation, using a model potential which strongly resembles the standard anharmonic $(1-\cos N\theta)$ potential, but contains only a piece-wise second order term.
A. A. Starobinsky +37 more
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On Source Density Evolution of Gamma-ray Bursts [PDF]
The Astrophysical Journal, 1998 Recent optical afterglow observations of gamma-ray bursts indicate a setting and distance scale that many relate to star-formation regions. In this paper, we use $$ and a set of artificial trigger thresholds to probe several potential GRB source density ...
Che H. +5 more
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Cosmological Evolution with Negative Energy Densities
Astrophysics, 2022 For general number of spatial dimensions we investigate the cosmological dynamics driven by a cosmological constant and by a source with barotropic equation of state. It is assumed that for both those sources the energy density can be either positive or negative. Exact solutions of the cosmological equations are provided for flat models.
Saharian, A. A. +5 more
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Noisy Density Evolution With Asymmetric Deviation Models [PDF]
IEEE Transactions on Communications, 2021 33 pages, accepted at IEEE Transactions on ...
Elsa Dupraz, Francois Leduc-Primeau
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Probability density evolution filter
Probabilistic Engineering Mechanics, 2022 Based on probability density evolution method (PDEM) and Bayes law, a new filter strategy is proposed, in which the prior probability of system state of interest is predicted by solving the general density evolution equation (GDEE), the posterior probability of system state is then updated in terms of Bayes formula.
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Strange Attractor in Density Evolution [PDF]
2018 IEEE 10th International Symposium on Turbo Codes & Iterative Information Processing (ISTC), 2018 13 pages updated version.
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Learning Swarm Interaction Dynamics From Density Evolution
IEEE Transactions on Control of Network Systems, 2023 We consider the problem of understanding the coordinated movements of biological or artificial swarms. In this regard, we propose a learning scheme to estimate the coordination laws of the interacting agents from observations of the swarm's density over time.
Christos N. Mavridis +2 more
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Neutrino oscillations with three flavors in matter of varying density [PDF]
, 2001 In this paper, we discuss the evolution operator and the transition probabilities expressed as functions of the vacuum mass squared differences, the vacuum mixing angles, and the matter density parameter for three flavor neutrino oscillations in matter ...
Ohlsson, Tommy, Snellman, Hakan
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The average structural evolution of massive galaxies can be reliably estimated using cumulative galaxy number densities [PDF]
, 2017 Galaxy evolution can be studied observationally by linking progenitor and descendant galaxies through an evolving cumulative number density selection. This procedure can reproduce the expected evolution of the median stellar mass from abundance matching.
Clauwens, Bart +3 more
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An analysis of the evolving comoving number density of galaxies in hydrodynamical simulations [PDF]
, 2015 The cumulative comoving number-density of galaxies as a function of stellar mass or central velocity dispersion is commonly used to link galaxy populations across different epochs.
Griffen, Brendan F. +12 more
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