Results 21 to 30 of about 8,116,877 (276)

Polynomial spline-approximation of Clarke's model [PDF]

open access: yes, 2004
We investigate polynomial spline approximation of stationary random processes on a uniform grid applied to Clarke's model of time variations of path amplitudes in multipath fading channels with Doppler scattering. The integral mean square error (MSE) for
Adlard, J F, Tozer, T C, Zakharov, Y V
core   +1 more source

Enhancing Average Secrecy Rates in Downlink NOMA with Dependent Channel Coefficients and Optimal Power Coefficients [PDF]

open access: yesComputer and Knowledge Engineering
Wireless communication systems demand efficient solutions, and non-orthogonal multiple access (NOMA) has emerged as a promising approach. The present investigation compares NOMA against orthogonal multiple access (OMA) methods, specifically focusing on ...
Faramarz Ajami Khales   +1 more
doaj   +1 more source

Design of cooperative matched filter for detection of chemical agents

open access: yesElectronics Letters, 2021
A matched filter (MF) is one of the most widely used detectors for the detection of chemical agent (CA) clouds in the passive hyperspectral imaging system.
Hyeong‐Geun Yu Dr.   +4 more
doaj   +1 more source

Differential Equations for Algebraic Functions [PDF]

open access: yes, 2007
It is classical that univariate algebraic functions satisfy linear differential equations with polynomial coefficients. Linear recurrences follow for the coefficients of their power series expansions.
Bostan, Alin   +4 more
core   +9 more sources

Indefinite stochastic linear-quadratic optimal control problems with random coefficients: Closed-loop representation of open-loop optimal controls [PDF]

open access: yesThe Annals of Applied Probability, 2018
This paper is concerned with a stochastic linear-quadratic optimal control problem in a finite time horizon, where the coefficients of the control system are allowed to be random, and the weighting matrices in the cost functional are allowed to be random
Jingrui Sun, J. Xiong, J. Yong
semanticscholar   +1 more source

Two Inverse Problems Solution by Feedback Tracking Control

open access: yesAxioms, 2021
Two inverse ill-posed problems are considered. The first problem is an input restoration of a linear system. The second one is a restoration of time-dependent coefficients of a linear ordinary differential equation.
Vladimir Turetsky
doaj   +1 more source

Wavelet coefficient computation with optimal prefiltering [PDF]

open access: yesIEEE Transactions on Signal Processing, 1994
Discrete wavelet transform (DWT) is often used to approximate wavelet series transform (WST) and continuous wavelet transform (CWT), since it can be computed numerically. In this research, we first study the accuracy of the computed DWT coefficients obtained from the Shensa (see ibid., vol.40, no.10, p.2464-2482, 1992) algorithm as an approximate of ...
Xiang-gen Xia   +2 more
openaire   +1 more source

H-Optimal Control in Coefficients for Dirichlet Parabolic Problems

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Modelûvannâ, 2010
In the paper the Dirichlet optimal control problem associated with a linear parabolic equation the coefficients of which we take as controls in L1(Ω) has been studied. Since equations of this type can exhibit the Lavrentieff phenomenon and non-uniqueness
I. G. Balanenko, P. I. Kogut
doaj   +1 more source

Simultaneous Optimal Estimation of Roughness and Minor Loss Coefficients in a Pipeline

open access: yesMathematical and Computational Applications, 2020
This paper presents a proposal to estimate simultaneously, through nonlinear optimization, the roughness and head loss coefficients in a non-straight pipeline.
Ildeberto Santos-Ruiz   +3 more
doaj   +1 more source

Is there a growing social acceptance of earnings inequalities in Poland?

open access: yesAnnales Etyka w Życiu Gospodarczym, 2018
In our studies, we deal with the estimating of the optimal ranges of earnings – the optimal Gini indexes which are favourable to the maximisation of GDP growth in Poland.
Paweł Kumor
doaj   +1 more source

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