Results 31 to 40 of about 167 (149)
The matrix completion problem regarding various classes of P0,1- matrices [PDF]
, 2005 A pattern of positions in an n x n real matrix is said to have pi-completion if every partial pi-matrix which specifies that pattern can be completed to a pi-matrix.
Wangsness, Amy
core +1 more source
Solutions of the system ofmaximum difference equations
MANAS: Journal of Engineering, 2015 The behaviour and periodicity of the solutions of the following system of difference equations is examined (1) where the initial conditions are positive real numbers.
D. Şimşek, M. Eröz
doaj +2 more sources
Asymptotic Sharpness of Bounds on Hypertrees
Discussiones Mathematicae Graph Theory, 2017 The hypertree can be defined in many different ways. Katona and Szabó introduced a new, natural definition of hypertrees in uniform hypergraphs and investigated bounds on the number of edges of the hypertrees.
Lin Yi, Kang Liying, Shan Erfang
doaj +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
openaire +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 +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
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
DEMONSTRATION OF PROTEIN HYDROGEN BONDING NETWORK APPLICATION TO MICROELECTRONICS [PDF]
, 2014 Model of hydrogen bonding networks in active site of b-lactamase during the last intermediate EY of acylenzyme reaction semicycle is presented. The I-V characteristics of each hydrogen bond are calculated following Marcus theory and theory of protein ...
Gieva, Elitsa E. +3 more
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