Results 81 to 90 of about 1,963,727 (308)

On Positive Recurrence of the M_n/GI/1/∞ Model

Mathematics, 2023
Positive recurrence for a single-server queueing system is established under generalized service intensity conditions, without the assumption of the existence of a service density distribution function, but with a certain integral type lower bound as a ...
Alexander Veretennikov
doaj   +1 more source

Spectral degeneracy and escape dynamics for intermittent maps with a hole

, 2011
We study intermittent maps from the point of view of metastability. Small neighbourhoods of an intermittent fixed point and their complements form pairs of almost-invariant sets.
Bahsoun W, Baladi V, Blank M, Collet P, Collet P, Collet P, Collett P, Dellnitz M, Demers M, Deuflhard P Schütte C, Dolgopyat D, Froyland G, Gary Froyland, Hunt B, Keller G, Koltai P, Ognjen Stancevic, Pianigiani G, Rua Murray, Ulam S   +19 more
core   +1 more source

Lacunary Invariant Statistical Convergence Of Sequences Of Sets With Respect To A Modulus Function

, 2015
In this paper, we introduce and study the concept of lacunary invariant convergence for sequences of sets with respect to modulus function f and give some inclusion relations.
N. Pancaroğlu, F. Nuray
semanticscholar   +1 more source

Investigation of Laser Ablation and Brush Pre‐Treatments for AlCu Cold Roll Bonding in Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti, Finn‐Lennard Janthur, Selina Raumel, Sascha Jan Zimmermann, Sarah Seffer, René Gustus, Sebastian Herbst, Marc C. Wurz, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Florian Nürnberger   +11 more
wiley   +1 more source

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

Advanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek, Jakub Hurník, Miroslav Šmíd, Ondřej Zobač, Melanie Todt, Daniel Koutný   +5 more
wiley   +1 more source

On the Beckenbach–Gini–Lehmer Means and Means Mappings

Mathematics, 2020
Beckenbacg–Gini–Lehmer type means and mean-type mappings generated by functions of several variables, for which the arithmetic mean is invariant, are introduced.
Janusz Matkowski, Małgorzata Wróbel
doaj   +1 more source

Convergence-Optimal Quantizer Design of Distributed Contraction-based Iterative Algorithms with Quantized Message Passing

, 2010
In this paper, we study the convergence behavior of distributed iterative algorithms with quantized message passing. We first introduce general iterative function evaluation algorithms for solving fixed point problems distributively.
Cui, Ying, Lau, Vincent K. N.
core   +2 more sources

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

A quadratic spline maximum entropy method for the computation of invariant densities

上海师范大学学报. 自然科学版, 2015
The numerical recovery of an invariant density of the Frobenius-Perron operator corresponding to a nonsingular transformation is depicted by using quadratic spline functions. We implement a maximum entropy method to approximate the invariant density. The
DING Jiu, UPADHYAY Tulsi
doaj   +1 more source

Global Dynamics of Some Exponential Type Systems

Discrete Dynamics in Nature and Society, 2020
We explore the boundedness and persistence, existence of an invariant rectangle, local dynamical properties about the unique positive fixed point, global dynamics by the discrete-time Lyapunov function, and the rate of convergence of some 2,3-type ...
A. Q. Khan, H. M. Arshad, B. A. Younis, KH. I. Osman, Tarek F. Ibrahim, I. Ahmed, A. Khaliq   +6 more
doaj   +1 more source