Results 111 to 120 of about 55,665 (307)

Combination of KLOE σ (e + e − → π+π−γ(γ)) measurements and determination of a μ π + π − $$ {a}_{\mu}^{\pi^{+}{\pi}^{-}} $$ in the energy range 0.10 < s < 0.95 GeV2

Journal of High Energy Physics, 2018
The three precision measurements of the cross section σ(e + e − → π + π −γ(γ)) using initial state radiation by the KLOE collaboration provide an important input for the prediction of the hadronic contribution to the anomalous magnetic moment of the muon.
The KLOE-2 collaboration, A. Anastasi, D. Babusci, M. Berlowski, C. Bloise, F. Bossi, P. Branchini, A. Budano, L. Caldeira Balkeståhl, B. Cao, F. Ceradini, P. Ciambrone, F. Curciarello, E. Czerwinski, G. D’Agostini, E. Danè, V. De Leo, E. De Lucia, A. De Santis, P. De Simone, A. Di Cicco, A. Di Domenico, D. Domenici, A. D’Uffizi, A. Fantini, G. Fantini, P. Fermani, S. Fiore, A. Gajos, P. Gauzzi, S. Giovannella, E. Graziani, V. L. Ivanov, T. Johansson, X. Kang, D. Kisielewska-Kaminska, E. A. Kozyrev, W. Krzemien, A. Kupsc, S. Loffredo, P. A. Lukin, G. Mandaglio, M. Martini, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, A. Passeri, V. Patera, E. Perez del Rio, N. Raha, P. Santangelo, M. Schioppa, A. Selce, M. Silarski, F. Sirghi, E. P. Solodov, L. Tortora, G. Venanzoni, W. Wislicki, M. Wolke, A. Keshavarzi, S.E. Müller, T. Teubner   +64 more
doaj   +1 more source

Estimation of Large-Dimensional Covariance Matrices via Second-Order Stein-Type Regularization. [PDF]

Entropy (Basel), 2022
Zhang B, Huang H, Chen J.
europepmc   +1 more source

Characteristic Polynomials of Sample Covariance Matrices [PDF]

Journal of Theoretical Probability, 2010
We investigate the second-order correlation function of the characteristic polynomial of a sample covariance matrix. Starting from an explicit formula for the generating function, we re-obtain several well-known kernels from random matrix theory.
openaire   +3 more sources

Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems

Advanced Electronic Materials, EarlyView.
Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang, Weipeng Wang, Xuan Cong, Shiyu Wang, Gao Li, Sen Gong, Lin Huang, Hongxin Zeng, Yaxin Zhang, Ziqiang Yang   +9 more
wiley   +1 more source

On the estimation of covariance matrices using panel data artificial regressions [PDF]

The use of artificial regressions to compute the variance of the difference of pairs of panel data estimators that cannot be ranked in terms of efficiency is considered.
Patacchini, Eleonora
core  

Covariance and correlations matrices.

, 2015
Covariance and correlations matrices.
Mats Jirstrand (727382), Loubna Bendrioua (727381), Joachim Almquist (727380), Stefan Hohmann (199760), Caroline Beck Adiels (487513), Mattias Goksör (487515)   +5 more
core   +1 more source

Multiple-Toeplitz Matrices Reconstruction Algorithm for DOA Estimation of Coherent Signals

IEEE Access, 2019
In this paper, a new direction-of-arrival (DOA) estimation method based on multiple Toeplitz matrices reconstruction is proposed for coherent narrowband signals with a uniform linear array (ULA).
Wei Zhang, Yong Han, Ming Jin, Xiaolin Qiao   +3 more
doaj   +1 more source

Principal regression for high dimensional covariance matrices. [PDF]

Electron J Stat, 2021
Zhao Y, Caffo B, Luo X, Alzheimer’s Disease Neuroimaging Initiative.   +3 more
europepmc   +1 more source

Covariance Characterization by Partial Autocorrelation Matrices

The Annals of Statistics, 1978
It is known that the autocorrelation function of a stationary discrete-time scalar process can be uniquely characterized by the so-called partial autocorrelation function, which is a sequence of numbers less or equal to one in magnitude. We show here that the matrix covariance function of a multivariate stationary process can be characterized by a ...
Morf, M., Vieira, A., Kailath, T.
openaire   +2 more sources

Exceptional Antimodes in Multi‐Drive Cavity Magnonics

Advanced Electronic Materials, EarlyView.
Driven‐dissipative cavity‐magnonics provides a flexible platform for engineering non‐Hermitian physics such as exceptional points. Here, using a four‐port, three‐mode system with controllable microwave interference, antimodes and coherent perfect extinction (CPE) are realized, enabling active tuning to antimode exceptional points.
Mawgan A. Smith, Ryan D. McKenzie, Alban Joseph, Robert L. Stamps, Rair Macêdo   +4 more
wiley   +1 more source