Results 71 to 80 of about 919,859 (183)

Itô’s Formula, the Stochastic Exponential, and Change of Measure on General Time Scales

open access: yesAbstract and Applied Analysis, 2017
We provide an Itô formula for stochastic dynamical equation on general time scales. Based on this Itô’s formula we give a closed-form expression for stochastic exponential on general time scales.
Wenqing Hu
doaj   +1 more source

A closed-form formula characterization of the Epps effect

open access: yesQuantitative Finance, 2019
In this study we provide an analytical characterization of the impact of zero returns on the popular realized covariance estimator of Barndorff-Nielsen and Shephard [Econometric analysis of realize...
Buccheri G.   +3 more
openaire   +4 more sources

Closed-Form Solution for CFAR Detection Threshold in G0 Distributed SAR Clutter

open access: yesIEEE Access
We devise a constant false alarm rate (CFAR) detector for detecting targets in clutter regions with varying degrees of heterogeneity. The CFAR detector employs the $\mathcal {G}^{0}$ distribution for characterizing the statistics of background ...
Dheeren Ku Mahapatra   +3 more
doaj   +1 more source

Ergodic Capacity for the SIMO Nakagami- Channel

open access: yesEURASIP Journal on Wireless Communications and Networking, 2009
This paper presents closed-form expressions for the ergodic channel capacity of SIMO (single-input and multiple output) wireless systems operating in a Nakagami- fading channel.
Vagenas EfstathiosD   +2 more
doaj  

On the size of two families of unlabeled bipartite graphs

open access: yesAKCE International Journal of Graphs and Combinatorics, 2019
Let denote the set of unlabeled bipartite graphs whose edges connect a set of vertices with a set of vertices. In this paper, we provide exact formulas for and using Polya’s Counting Theorem.
Abdullah Atmaca, A. Yavuz Oruç
doaj   +1 more source

Solvability of a product-type system of difference equations with six parameters

open access: yesAdvances in Nonlinear Analysis, 2016
Closed form formulas for well-defined complex-valued solutions to a product-type system of difference equations of interest with six parameters are presented. The form of the solutions is described in detail in terms of the parameters and initial values.
Stević Stevo
doaj   +1 more source

Sixteen practically solvable systems of difference equations

open access: yesAdvances in Difference Equations, 2019
Closed-form formulas for general solutions to sixteen hyperbolic-cotangent-type systems of difference equations of interest are obtained, showing their practical solvability and completely solving a solvability problem for some concrete values of delays.
Stevo Stević
doaj   +1 more source

A Simple and Accurate Closed-Form EGN Model Formula

open access: yes, 2015
arXiv admin note: substantial text overlap with arXiv:1402 ...
Poggiolini, P.   +3 more
openaire   +2 more sources

Accurate and simple closed-form formulas for coplanarwaveguide synthesis

open access: yesElectronics Letters, 1995
Very accurate and simple closed-form formulas for coplanar waveguide synthesis, which are approximated in terms of ordinary functions, are developed. Comprehensive comparisons have been made by using both a quasi-static analysis and a rigorous full-wave analysis. Accuracy is found to be better than 1% for most of the practical range.
Deng, T.Q., Leong, M.S., Kooi, P.S.
openaire   +1 more source

On Strongly Regular Graphs and the Friendship Theorem

open access: yesMathematics
This paper presents an alternative proof of the celebrated friendship theorem, originally established by Erdős, Rényi, and Sós in 1966. The proof relies on a closed-form expression for the Lovász ϑ-function of strongly regular graphs, recently derived by
Igal Sason
doaj   +1 more source

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