Results 11 to 20 of about 74,219 (267)
Nesting quadratic logarithmic demand systems [PDF]
Economics Letters, 2002 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lyssiotou, Panayiota Flori +5 more
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Fundamental response in the vibration control of buildings subject to seismic excitation with ATMD
Selecciones Matemáticas, 2023 The linear quadratic regulator for vibration systems subject to seismic excitations is discussed in his own physical newtonian space as a second-order linear differential system with matrix coefficients.
Fidel Jara Huanca +2 more
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Preimages of quadratic dynamical systems [PDF]
Involve, a Journal of Mathematics, 2011 For a quadratic endomorphism of the affine line defined over the rationals we consider the problem of bounding the number of rational points that eventually land at a given constant after iteration, called pre-images of the constant. In the article "Uniform Bounds on Pre-Images Under Quadratic Dynamical Systems," it was shown that the number of ...
Hutz, Benjamin +2 more
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Quadratic systems with a symmetrical solution
Electronic Journal of Qualitative Theory of Differential Equations, 2018 In this paper we study the existence and uniqueness of limit cycles for so-called quadratic systems with a symmetrical solution: \begin{equation*} \begin{split} \frac{dx(t)}{dt}& = P_2(x,y) \equiv a_{00}+a_{10}x+a_{01}y+a_{20}x^2+a_{11}xy+a_{02}y^2 ...
Andre Zegeling, Robert Kooij
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Least Squares Method for Solving Fuzzy LR Interval Algebraic Linear Systems
Fuzzy Information and Engineering, 2022 We first investigate the solvability conditions of fuzzy LR interval algebraic linear systems with fuzzy LR interval coefficient matrix and fuzzy LR interval hand-right vector.
Mehrnoosh Salari +2 more
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Rocky Mountain Journal of Mathematics, 1986 The paper is concerned with a chordal quadratic system \(dx/dt=P(x,y)\), (1) \(dy/dt=Q(x,y)\), namely a two-dimensional autonomous system with polynomial right-hand sides without finite singularities. The authors establish necessary and sufficient conditions for a quadratic system to be chordal and determine all possible phase portraits for such ...
Gasull, Armengol +2 more
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New asymptotically quadratic conditions for Hamiltonian elliptic systems
Advances in Nonlinear Analysis, 2021 This paper is concerned with the following Hamiltonian elliptic ...
Liao Fangfang, Zhang Wen
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Quadratic Dynamical Systems and Algebras
Journal of Differential Equations, 1995 It was observed by \textit{L. Markus} [Ann. Math. Stud. 45, 185-213 (1960; Zbl 0119.298)] that one can assign to every differential equation \(\dot x = Q(x)\) in \(\mathbb{R}^n\) with homogeneous quadratic \(Q\) a commutative, nonassociative algebra whose product is defined by \(xy = {1\over 2} (Q(x + y) - Q(x) - Q(y))\).
Kinyon, M.K., Sagle, A.A.
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Linear quadratic power control for CDMA systems
Journal of Telecommunications and Information Technology, 2003 In this paper, we present a robust decentralized method for jointly performing channel estimation and closed loop power control for the reverse link of CDMA networks. Our method, based on linear quadratic Gaussian (LQG) control systems theory and Kalman
Michael David Anderson +1 more
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Advanced Modeling and Simulation in Engineering Sciences, 2022 We propose an adaptive moment-matching framework for model order reduction of quadratic-bilinear systems. In this framework, an important issue is the selection of those shift frequencies where moment-matching is to be achieved.
Muhammad Altaf Khattak +3 more
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