Results 31 to 40 of about 50,387 (206)

Research on Risk Early Warning of the Chemical Supply Chain Based on Improved PSO Algorithm

Chemical Engineering Transactions, 2017
Due to the particularity of chemicals, chemicals are prone to accidents during the operation of the supply chain. The chemical accidents cause great harm to people's lives, property and surrounding environment.
Xuqi Zhang
doaj   +1 more source

Chain recurrence, chain transitivity, Lyapunov functions and rigidity of Lagrangian submanifolds of optical hypersurfaces [PDF]

, 2015
The aim of this paper is twofold. On the one hand, we discuss the notions of strong chain recurrence and strong chain transitivity for flows on metric spaces, together with their characterizations in terms of rigidity properties of Lipschitz Lyapunov ...
Abbondandolo, Alberto, Bernardi, Olga, Cardin, Franco   +2 more
core   +2 more sources

Existence of acyclic matching and Morse complex on transitive digraphs

AKCE International Journal of Graphs and Combinatorics
For any digraph, there exists a transitive closure. The transitive digraph is a discrete geometric object which has a close relationship with simplicial complex.
Chong Wang, Shiquan Ren
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Shadowable Points for flows

, 2017
A shadowable point for a flow is a point where the shadowing lemma holds for pseudo-orbits passing through it. We prove that this concept satisfies the following properties: the set of shadowable points is invariant and a $G_{\delta}$ set. A flow has the
Aponte, Jesús, Villavicencio, Helmuth
core   +1 more source

Landau-Zener transitions in chains

Physical Review A, 2013
We determine transition probabilities in two exactly solvable multistate Landau-Zener (LZ) models and discuss applications of our results to the theory of dynamic passage through a phase transition in the dissipationless quantum mechanical regime. In particular, we show that statistics of particles in a new phase demonstrate scaling behavior.
openaire   +3 more sources

Excitation Chains at the Glass Transition [PDF]

Physical Review Letters, 2006
The excitation-chain theory of the glass transition, proposed in an earlier publication, predicts diverging, super-Arrhenius relaxation times and, {\it via} a similarly diverging length scale, suggests a way of understanding the relations between dynamic and thermodynamic properties of glass-forming liquids.
openaire   +3 more sources

On the number of conjugacy classes of a permutation group [PDF]

, 2014
We prove that any permutation group of degree $n \geq 4$ has at most $5^{(n-1)/3}$ conjugacy classes.Comment: 9 ...
Garonzi, Martino, Maróti, Attila
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Phase transitions in isolated vortex chains [PDF]

Physical Review B, 2002
In very anisotropic layered superconductors (e.g. Bi$_2$Sr$_2$CaCu$_2$O$_x$) a tilted magnetic field can penetrate as two co-existing lattices of vortices parallel and perpendicular to the layers. At low out-of-plane fields the perpendicular vortices form a set of isolated vortex chains, which have recently been observed in detail with scanning Hall ...
openaire   +2 more sources

A dispersive dynamical system that is chain transitive

Examples and Counterexamples
This paper compares the notions of Auslander generalized recurrence and chain recurrence of dynamical systems. Generalized recurrent points are chain recurrent, however, chain recurrent points may not be generalized recurrent of any order. Because of the
Eduardo C. Viscovini, Josiney A. Souza
doaj   +1 more source

Proposition of the Quality Adjusted Geks-Type Price Index [PDF]

Statistika: Statistics and Economy Journal
Scanner data from retailers like supermarkets, electronics stores, and online shops provides detailed transaction information at the barcode level (e.g., GTIN, EAN), allowing for the use of various price index formulas, including weighted ones.
Jacek Białek, Natalia Pawelec
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