Results 21 to 30 of about 786,873 (284)

Exponential sums on A n

open access: yesIsrael Journal of Mathematics, 2000
15 pages, to appear in Israel J ...
Adolphson, Alan, Sperber, Steven
openaire   +2 more sources

Efficient spectral estimation by MUSIC and ESPRIT with application to sparse FFT

open access: yesFrontiers in Applied Mathematics and Statistics, 2016
In spectral estimation, one has to determine all parameters of an exponential sum for finitely many (noisy)sampled data of this exponential sum.Frequently used methods for spectral estimation are MUSIC (MUltiple SIgnal Classification) and ESPRIT ...
Daniel ePotts   +2 more
doaj   +1 more source

Deterministic Identity Testing for Sum of Read-Once Oblivious Arithmetic Branching Programs [PDF]

open access: yes, 2015
A read-once oblivious arithmetic branching program (ROABP) is an arithmetic branching program (ABP) where each variable occurs in at most one layer. We give the first polynomial time whitebox identity test for a polynomial computed by a sum of constantly
Gurjar, Rohit   +3 more
core   +3 more sources

Problem of modelling a layered medium taking into account the creep of its materials

open access: yesMATEC Web of Conferences, 2018
Problems for heterogeneous materials arise in many areas of construction. This article deals with elastic-creeping layered composite materials. Relations of the theory of linear heredity of Boltzmann-Volterra are accepted.
Bobyleva Tatiana, Shamaev Alexei
doaj   +1 more source

The exponential sum over squarefree integers [PDF]

open access: yes, 2004
We give an upper bound for the exponential sum over squarefree integers.
Schlage-Puchta, Jan-Christoph
core   +1 more source

Relationship between Item Responses of Negative Affect Items and the Distribution of the Sum of the Item Scores in the General Population.

open access: yesPLoS ONE, 2016
BackgroundSeveral studies have shown that total depressive symptom scores in the general population approximate an exponential pattern, except for the lower end of the distribution.
Shinichiro Tomitaka   +6 more
doaj   +1 more source

Level Sets Guided by SoDEF-Fitting Energy for River Channel Detection in SAR Images

open access: yesRemote Sensing, 2023
To achieve river channel detection in SAR (synthetic aperture radar) images, we developed a level-set-based model (LSBM) guided by a designed data-fitting energy which is called the SoDEF (sum of dual exponential functions)-fitting energy.
Bin Han, Anup Basu
doaj   +1 more source

The exponential distribution as the sum of discontinuous distributions [PDF]

open access: yesBulletin of Computational Applied Mathematics, 2013
We show that for any natural number $n$, an exponential distribution can be written as the sum of $n$ discontinuous variables and another exponential distribution, all of them independent.
José Luis Palacios
doaj  

Exponential sum approximations for $t^{-\beta}$

open access: yes, 2017
Given $\beta>0$ and $\delta>0$, the function $t^{-\beta}$ may be approximated for $t$ in a compact interval $[\delta,T]$ by a sum of terms of the form $we^{-at}$, with parameters $w>0$ and $a>0$. One such an approximation, studied by Beylkin and Monz\'on,
B Alpert   +6 more
core   +1 more source

SINGULAR POINTS FOR THE SUM OF A SERIES OF EXPONENTIAL MONOMIALS

open access: yesПроблемы анализа, 2018
A problem of distribution of singular points for sums of series of exponential monomials on the boundary of its convergence domain is studied. The influence of a multiple sequence Λ = {λk, nk}_(∞;k=1) of the series in the presence of singular points on ...
Krivosheeva O . A .   +1 more
doaj   +1 more source

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