Results 31 to 40 of about 8,198 (217)

A quantum model of lasing without inversion

open access: yesNew Journal of Physics, 2022
Starting from a quantum description of multiple Λ-type three-level atoms driven with a coherent microwave field and incoherent optical pumping, we derive a microscopic model of lasing from which we move towards a consistent macroscopic picture.
Nicholas Werren   +2 more
doaj   +1 more source

A Note on Cumulant Technique in Random Matrix Theory

open access: yesEntropy, 2023
We discuss the cumulant approach to spectral properties of large random matrices. In particular, we study in detail the joint cumulants of high traces of large unitary random matrices and prove Gaussian fluctuation for pair-counting statistics with non ...
Alexander Soshnikov, Chutong Wu
doaj   +1 more source

Higher Order Feature Extraction and Selection for Robust Human Gesture Recognition using CSI of COTS Wi-Fi Devices

open access: yesSensors, 2019
Device-free human gesture recognition (HGR) using commercial off the shelf (COTS) Wi-Fi devices has gained attention with recent advances in wireless technology.
Hasmath Farhana Thariq Ahmed   +5 more
doaj   +1 more source

Underground signal recognition method based on higher-order cumulants and DNN model

open access: yesGong-kuang zidonghua, 2020
In view of complex and heterogeneous wireless environment of mine, an underground signal recognition method based on higher-order cumulants and DNN model was proposed to realize automatic modulation recognition of underground digital signals of BPSK ...
WANG Anyi, LI Li
doaj   +1 more source

Error estimate in the central limit theorem

open access: yesLietuvos Matematikos Rinkinys, 2008
In this paper, we determined, independent identically distributed random variable’s {Xk, k = 1,2,...} centered and normalized sum’s Sn = \sumn k=1 Xk distribution’s Fn(x) = P(Zn < x) exact error estimate in case of the normal approximation with one ...
Aurelija Kasparavičiūtė   +1 more
doaj   +1 more source

Joint cumulants for natural independence [PDF]

open access: yes, 2011
Many kinds of independence have been defined in non-commutative probability theory. Natural independence is an important class of independence; this class consists of five independences (tensor, free, Boolean, monotone and anti-monotone ones).
Hasebe, Takahiro, Saigo, Hayato
core   +1 more source

On large deviations for compound mixed Poisson process

open access: yesLietuvos Matematikos Rinkinys, 2013
This paper is designated for normal approximation to the distribution function of the compound mixed Poisson process taking into consideration large deviations both in the Cramér and power Linnik zones.
Aurelija Kasparavičiūtė   +1 more
doaj   +1 more source

Noncommutative free cumulants

open access: yes, 2017
International audienceThe relation between moments and free cumulants in free probability is essentially a compositional inversion. We lift it at the level of the noncommutative Faà di Bruno algebra, and of an operad of Schröder trees.
Menous, Frédéric   +3 more
core   +4 more sources

Cumulants of the QCD topological charge distribution

open access: yesPhysics Letters B, 2015
The distribution of the QCD topological charge can be described by cumulants, with the lowest one being the topological susceptibility. The vacuum energy density in a θ-vacuum is the generating function for these cumulants.
Feng-Kun Guo, Ulf-G. Meißner
doaj   +1 more source

An array virtual extension method for power equipment acoustic emission direction of arrival estimation based on high‐order cumulants

open access: yesHigh Voltage, 2021
The performance of array‐based power equipment acoustic emission (AE) source directional of arrival (DOA) estimation methods is decided by not only algorithm performance, but also the array hardware parameters, that is, array aperture, sensor number, and
Nan Zhou   +4 more
doaj   +1 more source

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