Results 91 to 100 of about 679,323 (292)
On the Integrability of Persistent Quadratic Three-Dimensional Systems
MathematicsWe consider a nine-parameter familiy of 3D quadratic systems, x˙=x+P2(x,y,z), y˙=−y+Q2(x,y,z), z˙=−z+R2(x,y,z), where P2,Q2,R2 are quadratic polynomials, in terms of integrability.
Brigita Ferčec +2 more
doaj +1 more source
Discrete Dynamics in Nature and Society, 2011 Using the fixed point method, we investigate the stability of the systems of quadratic-cubic and additive-quadratic-cubic functional equations with constant coefficients form r-divisible groups into Ŝerstnev probabilistic Banach spaces.
M. Eshaghi Gordji +3 more
doaj +1 more source
Natural preconditioners for saddle point systems [PDF]
, 2013 The solution of quadratic or locally quadratic extremum problems subject to linear(ized) constraints gives rise to linear systems in saddle point form.
Pestana, Jennifer, Wathen, A. J.
core +1 more source
2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics
Advanced Functional Materials, EarlyView.2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit +5 more
wiley +1 more source
Robust Stability of Quantum Systems with Nonlinear Dynamic Uncertainties
, 2013 This paper considers the problem of robust stability for a class of uncertain nonlinear quantum systems subject to unknown perturbations in the system Hamiltonian.
Petersen, Ian R.
core +1 more source
Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges
Advanced Functional Materials, EarlyView.Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley +1 more source
Simpson’s Variational Integrator for Systems with Quadratic Lagrangians
AxiomsThis contribution proposes a variational symplectic integrator aimed at linear systems issued from the least action principle. An internal quadratic finite-element interpolation of the state is performed at each time step.
Juan Antonio Rojas-Quintero +2 more
doaj +1 more source
Quadratic harmonic morphisms and O-systems [PDF]
Annales de l'Institut Fourier, 1997 We introduce O-systems (Definition 3.1) of orthogonal transformations of ℝ m , and establish ℝ correspondences both between equivalence classes of Clifford systems and those of O-systems, and between O-systems and orthogonal multiplications of the form μ:ℝ n ×ℝ m →ℝ m , which allow us to solve the existence problems both for O-systems and for umbilical
openaire +3 more sources
Advanced Functional Materials, EarlyView.ABSTRACT Breathable membranes that reject chemical warfare agents (CWAs) are required for next‐generation protective apparel. A dual‐function graphene oxide (GO)‐polyamine architecture is introduced that addresses the long‐standing tradeoff between vapor transmission and CWA selectivity.
Hyungjun Kim +6 more
wiley +1 more source
Robust switched controller design for linear continuous-time systems
Archives of Control Sciences, 2015 In this paper we study a novel approach to the design of a robust switched controller for continuous-time systems described by a novel robust plant model using quadratic stability and multi parameter dependent quadratic stability approaches.
Ilka Adrian, Veselý Vojtech
doaj +1 more source