Results 21 to 30 of about 118 (112)
Discrete Dynamics in Nature and Society, Volume 2020, Issue 1, 2020., 2020 We investigate the local and global character of the unique equilibrium point and boundedness of the solutions of certain homogeneous fractional difference equation with quadratic terms. Also, we consider Neimark–Sacker bifurcations and give the asymptotic approximation of the invariant curve.
Mirela Garić-Demirović +4 more
wiley +1 more source
R-matrices for the semicyclic representations of Uq(2) [PDF]
Physics Letters A, 1992 R-matrices for the semicyclic representations of U_qsl^(2) are found as a limit in the checkerboard chiral Potts model.
Ivanov, I. T., Uglov, D. B.
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On a System of k‐Difference Equations of Order Three
Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 In this paper, we deal with the global behavior of the positive solutions of the system of k‐difference equations un+11=α1un−11/β1+α1un−22r1, un+12=α2un−12/β2+α2un−23r2,…, un+1k=αkun−1k/βk+αkun−21rk,n∈ℕ0, where the initial conditions u−lil=0,1,2 are nonnegative real numbers and the parameters αi, βi, γi, and ri are positive real numbers for i = 1,2, …,
Ibrahim Yalçınkaya +4 more
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On the areas of cyclic and semicyclic polygons
Advances in Applied Mathematics, 2005 We investigate the ``generalized Heron polynomial'' that relates the squared area of an n-gon inscribed in a circle to the squares of its side lengths. For a (2m+1)-gon or (2m+2)-gon, we express it as the defining polynomial of a certain variety derived from the variety of binary (2m-1)-forms having m-1 double roots.
Miller Maley, F. +2 more
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Fully Printed Piezoelectric Polymer Loudspeakers with Enhanced Acoustic Performance
Advanced Engineering Materials, Volume 21, Issue 11, November 2019., 2019 Sandwich‐layer structures of poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)‐ poly(vinylidene fluoride‐trifluoroethylene) (P(VDF‐TrFE))‐PEDOT:PSS are fully printed on paper substrates. Dielectric spectroscopy demonstrates a fall‐off frequency of about 8 kHz. The P(VDF‐TrFE) layer is poled with a sufficiently high electric field.
Xunlin Qiu +5 more
wiley +1 more source
A low kickback fully differential dynamic comparator for pipeline analog‐to‐digital converters
Engineering Reports, Volume 1, Issue 4, November 2019., 2019 This study presents a fully differential dynamic comparator with low kickback noise, an effect caused by voltage variations in the regeneration nodes of these types of circuit. Given their low power dissipation, dynamic comparators are key circuits in analog‐to‐digital converters (ADCs), especially in pipelined ADCs.
Jose‐Angel Diaz‐Madrid +3 more
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The semicycles of solutions of delay difference equations
Computers & Mathematics with Applications, 1999 The authors study the semicycles of oscillatory solutions of the delay difference equation \(y_{n+1}-y_n+ p_ny_{n-k}=0\). Upper bounds of numbers of terms of semicycles are determined.
Zhang, Bing Gen, Zhou, Yong
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Discrete Dynamics in Nature and Society, Volume 2024, Issue 1, 2024.The aim of this article is to get the forms of the solutions of the following nonlinear higher‐order difference equations χs+1=χs−31k+/±1±Πl=1kχs−31l+,s=012,,,…, where the initial conditions χ−j, j = 0, 1, 2, …, 3k − 1 and k ∈ {1, 2, …} are arbitrary real numbers.
Ghada AlNemer +6 more
wiley +1 more source
Six‐phase dual‐interleaved buck‐boost converter for high power‐density automotive applications
The Journal of Engineering, Volume 2019, Issue 17, Page 3592-3597, June 2019., 2019 This study presents a 30 kW, six‐phase dual‐interleaved buck‐boost converter which uses an interphase transformer together with six buck‐boost switching arms hard switched at 75 kHz for electric/hybrid vehicle applications. Parameters and construction details of the interphase transformer and common inductors are provided together with a description of
P. E. Velázquez‐Elizondo +5 more
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Global Dynamics of a 3 × 6 System of Difference Equations
Discrete Dynamics in Nature and Society, Volume 2019, Issue 1, 2019., 2019 In the proposed work, global dynamics of a 3 × 6 system of rational difference equations has been studied in the interior of R+3. It is proved that system has at least one and at most seven boundary equilibria and a unique +ve equilibrium under certain parametric conditions.
S. M. Qureshi +2 more
wiley +1 more source