Results 31 to 40 of about 287 (158)
, 2020 Using the powered GTAW process to perform additive manufacturing on aluminum plates, this work sought to verify the effect of the variation of pulse frequency on the height of the deposited wall.
Miguel Guilherme Antonello +4 more
semanticscholar +1 more source
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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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
wiley +1 more source
ON SEMICYCLES OF SOLUTIONS OF NONLINEAR DIFFERENCE EQUATIONS WITH SEVERAL DELAYS
Demonstratio Mathematica, 2003 The authors give an estimate of the upper bound of the number of terms of semicycles of oscillatory solutions of delay difference equations of the form: \((ax_{n+1}+bx_n)^k -(cx_n)^k + \sum_{i=1}^mp_i(n)x_{n-\sigma_i}^k=0\), where \(a,b,c\) are positive reals, \(c>b\), \(k=q/r\), \(q,r\) are odd integers, \(m,\sigma_i\) are positive integers, \(\{ p_i ...
Li, C. F., Zhou, Yong, Luo, X. N.
openaire +2 more sources
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
wiley +1 more source
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
Discrete Dynamics in Nature and Society, Volume 2018, Issue 1, 2018., 2018 Sufficient conditions are established for the permanence in a delayed Nicholson’s blowflies model with feedback control on time scales. Our investigation confirms that the bounded feedback terms do not have any influence on the permanence of this system.
Lin-Lin Wang +2 more
wiley +1 more source
LQR Based Optimal Topology of Hybrid‐Weighted Multiagent Systems
Mathematical Problems in Engineering, Volume 2018, Issue 1, 2018., 2018 In this paper, the optimal topology structure is studied for hybrid‐weighted leader‐follower multiagent systems (MASs). The results are developed by taking advantage of linear quadratic regulator (LQR) theory. We show that the multiagent star composite structure is the optimal topology which can enable the MAS to achieve the bipartite consensus.
Shuai Liu +4 more
wiley +1 more source