Results 11 to 20 of about 337,853 (263)

STABILITY ANALYSIS OF PERIODIC AND ALMOST-PERIODIC DISCRETE SWITCHED LINEAR SYSTEM [PDF]

open access: yesMatrix Science Mathematic, 2018
This article shows a connection between the boundedness and uniform exponential stability of linear discrete switched system in the space of periodic and almost-periodic sequences.
Akbar Zada, Sartaj Ali
doaj   +1 more source

Particular Symmetries: Group Theory of the Periodic System

open access: yesSubstantia, 2020
To this day, a hundred and fifty years after Mendeleev's discovery, the overal structure of the periodic system remains unaccounted for in quantum-mechanical terms.
Pieter Thyssen, Arnout Ceulemans
doaj   +1 more source

Periodicity Trees in a Secondary Criterion of Periodic Classification: Its Implications for Science Teaching and Communication

open access: yesSubstantia, 2019
In this work, I will present a proposal for introductory courses in chemistry. After the topics of atomic structure, chemical periodicity and chemical bonding, this proposal addresses the study of the periodic system based on triads, which has closed ...
Alfio Zambon
doaj   +1 more source

Periodic drying chamber automated control system

open access: yesТехнічна інженерія, 2022
The article is devoted to searching for solutions to the problems of the temperature controlling algorithms in a batch drying chamber implementation.
О.M. , A.V. , V.M.
doaj   +1 more source

Periodic Lyapunov functions for periodic TS systems [PDF]

open access: yesSystems & Control Letters, 2013
Abstract In this paper we consider stability analysis and controller design for periodic Takagi–Sugeno fuzzy models. To develop the conditions, we use a switching nonquadratic Lyapunov function defined at the time instants when the subsystems switch.
Zsófia Lendek   +2 more
openaire   +1 more source

Connections between Hyers-Ulam stability and uniform exponential stability of 2-periodic linear nonautonomous systems

open access: yesAdvances in Difference Equations, 2017
We prove that the system θ ˙ ( t ) = Λ ( t ) θ ( t ) $\dot{\theta}(t) =\Lambda(t)\theta(t)$ , t ∈ R + $t\in\mathbb{R}_{+}$ , is Hyers-Ulam stable if and only if it is uniformly exponentially stable under certain conditions; we take the exact solutions of
Akbar Zada   +3 more
doaj   +1 more source

Implementation of Laplace Transformed MP2 for Periodic Systems With Numerical Atomic Orbitals

open access: yesFrontiers in Chemistry, 2020
We present an implementation of the canonical and Laplace-transformed formulation of the second-order Møller–Plesset perturbation theory under periodic boundary conditions using numerical atomic orbitals.
Honghui Shang, Jinlong Yang
doaj   +1 more source

Bounded and Periodic Solutions of Semilinear Impulsive Periodic System on Banach Spaces

open access: yesFixed Point Theory and Applications, 2008
A class of semilinear impulsive periodic system on Banach spaces is considered. First, we introduce the T0-periodic PC-mild solution of semilinear impulsive periodic system.
Qian Chen   +3 more
doaj   +2 more sources

Compounds Bring Back Chemistry to the System of Chemical Elements

open access: yesSubstantia, 2019
The periodic system of chemical elements was historically devised by assessing order and similarity relationships among the elements from their compounds, that is, using the accumulated results of chemical practice and knowledge.
Guillermo Restrepo
doaj   +1 more source

Controversial Elements: Priority Disputes and the Discovery of Chemical Elements

open access: yesSubstantia, 2019
There are only a limited number of chemical elements and to be credited with the discovery of a new one is therefore considered of great importance. Adding to the honour and fame is that traditionally the discoverer has the right to name the element in ...
Helge Kragh
doaj   +1 more source

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