Results 11 to 20 of about 331,394 (276)

Statistical Beamforming for Multi-Set Space–Time Shift-Keying-Based Full-Duplex Millimeter Wave Communications

open access: yesMathematics, 2023
Full-duplex (FD) communication has been shown to provide an increased achievable rate, while millimeter wave (mmWave) communications benefit from a large available bandwidth that further improves the achievable rate.
Abdulah Jeza Aljohani   +4 more
doaj   +1 more source

Fibonacci Turbulence

open access: yesPhysical Review X, 2021
Never is the difference between thermal equilibrium and turbulence so dramatic, as when a quadratic invariant makes the equilibrium statistics exactly Gaussian with independently fluctuating modes.
Natalia Vladimirova   +2 more
doaj   +1 more source

Statistical Method Based Waveform Optimization in Collocated MIMO Radar Systems

open access: yesMathematics, 2023
Multiple-input multiple-output (MIMO) radar has acquired considerable attention as it offers an additional degree of freedom which results in performance gains when contrasted with the regular single antenna element radar system. Waveform optimization in
Ahmad Kamal Hassan   +3 more
doaj   +1 more source

Improved adaptive EWMA control chart for process location with applications in groundwater physicochemical parameters and glass manufacturing industry

open access: yesPLoS ONE, 2022
The adaptive exponentially weighted moving average (AEWMA) control charts are the advanced form of classical memory control charts used for efficiently monitoring small-to-large shifts in the process parameters (location and/or dispersion).
Muhammad Arslan   +5 more
doaj   +2 more sources

Effects of dietary flavonoids on performance, blood constituents, carcass composition and small intestinal morphology of broilers: a meta-analysis [PDF]

open access: yesAnimal Bioscience, 2021
Objective This study aims to evaluate the influence of dietary flavonoids on the growth performance, blood and intestinal profiles, and carcass characteristics of broilers by employing a meta-analysis method.
Tri Rachmanto Prihambodo   +6 more
doaj   +1 more source

Structural change detection in ordinal time series.

open access: yesPLoS ONE, 2021
Change-point detection in health care data has recently obtained considerable attention due to the increased availability of complex data in real-time. In many applications, the observed data is an ordinal time series.
Fuxiao Li, Mengli Hao, Lijuan Yang
doaj   +1 more source

Saddlepoint approximations for noncentral quadratic forms [PDF]

open access: yes, 1998
Many estimators and tests are of the form of a ratio of quadratic forms in normal variables. Excepting a few very special cases little is known about the density or distribution of these ratios, particularly if we allow for noncentrality in the quadratic
Marsh, P.W.N.
core   +1 more source

An Accurate Approximation to the Distribution of a Linear Combination of Non-Central Chi-Square Random Variables

open access: yesRevstat Statistical Journal, 2013
This paper provides an accessible methodology for approximating the distribution of a general linear combination of non-central chi-square random variables. Attention is focused on the main application of the results, namely the distribution of positive
Hyung-Tae Ha
doaj   +1 more source

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