Zobrazeno 1 - 10
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pro vyhledávání: '"Picci, P"'
Autor:
Picci, Giorgio
We attempt to characterize irreversibility of a dynamical system from the existence of different forward and backward mathematical representations depending on the direction of the time arrow. Such different representations only exist for stochastic
Externí odkaz:
http://arxiv.org/abs/2411.01516
Autor:
Mazziotta, M. N., Loparco, F., Anelli, A., Belviso, M. M., Buquicchio, A., Cassano, E. V., De Cosmo, M., Ginefra, P., Martulli, M. L., Picci, C., Picicci, D., Soriano, R. D., Tatulli, A. P., Tripaldella, G., Zupo, V. M., Muscarella, M. F., Turbacci, S., Boselli, M., Silva, C. B. da Cruz E, Joos, M., Schütze, P.
We have designed and implemented an experiment to measure the angular distributions and the energy spectra of the transition radiation X-rays emitted by fast electrons and positrons crossing different radiators. Our experiment was selected among the
Externí odkaz:
http://arxiv.org/abs/2301.11247
This paper deals with the estimation of the hidden factor in Dynamic Generalized Factor Analysis via a generalization of Kalman filtering. Asymptotic consistency is discussed and it is shown that the Kalman one-step predictor is not the right tool wh
Externí odkaz:
http://arxiv.org/abs/2211.12789
Autor:
Giulia Picci
Publikováno v:
Rivista di Criminologia, Vittimologia e Sicurezza, Vol XVII, Pp 88-101 (2023)
The lack of adequate regulation in the art market, combined with the frequent complexities in verifying the exact provenance and authenticity of artworks and antiquities, intensifies with alarming frequency a long series of risk factors associated wi
Externí odkaz:
https://doaj.org/article/c533ca6615bb4ca585d49201740fb552
We study modeling and identification of stationary processes with a spectral density matrix of low rank. Equivalently, we consider processes having an innovation of reduced dimension for which Prediction Error Methods (PEM) algorithms are not directl
Externí odkaz:
http://arxiv.org/abs/2111.10899
Rank-deficient stationary stochastic vector processes are present in many problems in network theory and dynamic factor analysis. In this paper we study hidden dynamical relations between the components of a discrete-time stochastic vector process an
Externí odkaz:
http://arxiv.org/abs/2109.11814
Autor:
Abraham D. Killanin, Thomas W. Ward, Christine M. Embury, Vince D. Calhoun, Yu-Ping Wang, Julia M. Stephen, Giorgia Picci, Elizabeth Heinrichs-Graham, Tony W. Wilson
Publikováno v:
Developmental Cognitive Neuroscience, Vol 66, Iss , Pp 101354- (2024)
Numerous investigations have characterized the oscillatory dynamics serving working memory in adults, but few have probed its relationship with chronological age in developing youth. We recorded magnetoencephalography during a modified Sternberg verb
Externí odkaz:
https://doaj.org/article/11fc0a6ba9b348d9864596130e577813
We study modeling and identification of processes with a spectral density matrix of low rank. Equivalently, we consider processes having an innovation of reduced dimension for which Prediction Error Methods (PEM) algorithms are not directly applicabl
Externí odkaz:
http://arxiv.org/abs/2012.05004
Autor:
Picci, Giorgio, Zhu, Bin
We study the approximation of stationary processes by a simple class of purely deterministic signals. This has an analytic counterpart in the approximation of symmetric positive definite Toeplitz matrices by submatrices of finite rank. We propose a n
Externí odkaz:
http://arxiv.org/abs/2009.05758
Building on a recent paper by Georgiou and Lindquist [1] on the problem of rank deficiency of spectral densities and hidden dynamical relations after sampling of continuous-time stochastic processes, this paper is devoted to understanding related que
Externí odkaz:
http://arxiv.org/abs/2004.02463