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- Institut d'Estudis Espacials de CatalunyaES488 papers
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22 papers · 1 filter
Substructure in the ENACS clusters
J. M. Solanes, E. Salvador-Sole, G. Gonzalez-Casado
Subclustering is investigated in a set of 67 rich cluster galaxy samples extracted from the ESO Nearby Abell Cluster Survey (ENACS) catalog. We apply four well-known statistical te…
Coherence and synchronization in diode-laser arrays with delayed global coupling
J. Garcia-Ojalvo, J. Casademont, C. R. Mirasso +2
The dynamics of a semiconductor-laser array whose individual elements are coupled in a global way through an external mirror is numerically analysed. A coherent in-phase solution i…
Why are Halo Density Profiles Stable at Formation?
G. Gonzalez-Casado, A. Raig, E. Salvador-Sole
We analyze the physical justification of the picture proposed by Salvador-Sole et al. in these proceedings for the time evolution of the universal density profile of dark-matter ha…
Scaling Evolution of Universal Dark-Matter Halo Density Profiles
A. Raig, G. Gonzalez-Casado, E. Salvador-Sole
Dark-matter halos show a universal density profile with a scaling such that less massive systems are typically denser. This mass-density relation is well described by a proportiona…
A role of constraint in self-organization
Carlos Domingo, Osamu Watanabe, Tadashi Yamazaki
In this paper we introduce a neural network model of self-organization. This model uses a variation of Hebb rule for updating its synaptic weights, and surely converges to the equi…
Practical algorithms for on-line sampling
Carlos Domingo, Ricard Gavalda, Osamu Watanabe
One of the core applications of machine learning to knowledge discovery consists on building a function (a hypothesis) from a given amount of data (for instance a decision tree or…