Results 41 to 50 of about 176 (125)

Global Dynamics of Some Exponential Type Systems

Discrete Dynamics in Nature and Society, Volume 2020, Issue 1, 2020., 2020
We explore the boundedness and persistence, existence of an invariant rectangle, local dynamical properties about the unique positive fixed point, global dynamics by the discrete‐time Lyapunov function, and the rate of convergence of some (2,3)‐type exponential systems of difference equations. Finally, theoretical results are numerically verified.
A. Q. Khan, H. M. Arshad, B. A. Younis, KH. I. Osman, Tarek F. Ibrahim, I. Ahmed, A. Khaliq, Qasem M. Al-Mdallal   +7 more
wiley   +1 more source

Stability, Neimark–Sacker Bifurcation, and Approximation of the Invariant Curve of Certain Homogeneous Second‐Order Fractional Difference Equation

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, Samra Moranjkić, Mehmed Nurkanović, Zehra Nurkanović, Abdul Qadeer Khan   +4 more
wiley   +1 more source

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, Hijaz Ahmad, Durhasan Turgut Tollu, Yong-Min Li, E. M. Khalil   +4 more
wiley   +1 more source

On the recursive sequence xn+1 = γxn-1+δxn-2/Cxn-1+Dxn-2

, 2003
We investigate the global character of solutions of the equation in the title with positive parameters and positive initial conditions. We obtain results about the global attractivity of the equilibrium, the existence and attractivity of the period-two ...
Kalabušić, S., Kulenović, M. R.S.
core   +1 more source

Discretized data and the (two) SCEN_FIT solutions that result from the optimal subgraphs given in Figure 5.

, 2013
The color coding is the same as in Figure 3. All six optimal subgraphs contained in Figure 5 give rise to the same SCEN_FIT solution, except for the CREB column.
Leonidas G. Alexopoulos (115324), Steffen Klamt (25228), Ioannis N. Melas (115318), Regina Samaga (261122)   +3 more
core   +1 more source

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, Georg C. Schmidt, Pramul Muraleedhara Panicker, Ricardo Alonso Quintana Soler, Aravindan Joseph Benjamin, Arved C. Hübler   +5 more
wiley   +1 more source

On the recursive sequence xn+1=(α+βxn)/(Bxn+Cxn−1)

, 2001
The global character of solutions of a recursive sequence were investigated. The parameters and initial conditions of the nonlinear, second order and rational difference equation were nonnegative and positive, respectively.
Valicenti, S. V., G. Ladas, Cunningham, K., S.V. Valicenti, Kulenović, M. R.S., M.R.S. Kulenović, Ladas, G., K. Cunningham   +7 more
core   +1 more source

Development of a Vanadium Redox Flow Battery Operating with Thin Membrane Coupled with a Highly Selective and Stable Silica‐Based Barrier Layer

Energy Technology, Volume 12, Issue 8, August 2024.
Using silica nanoparticles in the barrier layer allows for the improvement of its selectivity, reducing the self‐discharge of a vanadium redox flow battery by 5 times compared to the supporting membrane, without affecting efficiency. Due to its high selectivity and stability, the barrier can also be used coupled with a thin membrane, enhancing energy ...
Marco Cecchetti, Thomas A. Ebaugh, Leonard Bonville, Radenka Maric, Andrea Casalegno, Matteo Zago   +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, Gines Domenech‐Asensi, Johann Hauer, Loreto Mateu   +3 more
wiley   +1 more source

Dynamical Behavior and Expressions of Solutions of a Class of Higher‐Order Nonlinear Difference Equations

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, Lama Sh. Aljoufi, A. M. Ahmed, Samir Al Mohammady, M. Zakarya, H. M. Rezk, Douglas R. Anderson   +6 more
wiley   +1 more source