Results 211 to 220 of about 155,883 (264)

Generating Unconventional Spin‐Orbit Torques With Patterned Phase Gradients in Tungsten Thin Films

Advanced Materials, EarlyView.
ABSTRACT A key aim in spintronics is to achieve current‐induced magnetization switching via spin‐orbit torques without external magnetic fields. For this, the focus of recent work has been on introducing controlled lateral gradients across ferromagnet/heavy‐metal devices, giving variations in thickness, composition, or interface quality.
Lauren J. Riddiford, Anne Flechsig, Shilei Ding, Emir Karadža, Niklas Kercher, Tobias Goldenberger, Elisabeth Müller, Pietro Gambardella, Laura J. Heyderman, Aleš Hrabec   +9 more
wiley   +1 more source

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Discrete event control with active events

Proceedings 1999 IEEE International Conference on Robotics and Automation (Cat. No.99CH36288C), 2003
The traditional framework for discrete-event control is extended to include the case of control with active events, in which both the user and the environment have events that they can trigger. A variety of liveness and safety specifications can be considered within this extended framework.
Michael Heymann, Feng Lin, George Meyer, Satya Ranjan Mohanty, Vigyan Chandra, Ratnesh Kumar 0001   +5 more
openaire   +2 more sources

On the history of Discrete Event Systems

Annual Reviews in Control, 2018
Abstract The purpose of this article is to provide a viewpoint of the development of the field of Discrete Event Systems (DES). Necessarily incomplete, because of the breath of topics and richness of research results, this paper is mainly presented from a System Theory-Automatic Control (AC) perspective. Written with a certain emphasis at the dawn of
Manuel Silva Suárez
exaly   +2 more sources

Diagnosability of discrete event systems

IEEE Transactions on Automatic Control, 1995
The authors study the diagnosability of discrete-event systems. Failure detection and isolation is an important task in the automatic control of large, complex systems. A discrete event system (DES) approach to the problem of failure diagnosis is proposed in this work.
Meera Sampath, Raja Sengupta 0002, Stéphane Lafortune, Kasim Sinnamohideen, Demosthenis Teneketzis   +4 more
openaire   +1 more source

Discrete Event Dynamic Programming with Simultaneous Events

Mathematics of Operations Research, 1988
This paper deals with an infinite-horizon discrete-event dynamic programming model with discounting, and with Borel state and action spaces. Instead of the usual n-stage contraction assumption (Denardo, E. V. 1967. Contraction mappings in the theory underlying dynamic programming. SIAM Rev.
Pierre L'Ecuyer, Alain Haurie
openaire   +1 more source

Modeling a System with Discrete Events

2012 Sixth UKSim/AMSS European Symposium on Computer Modeling and Simulation, 2012
The goal of this paper is to differentiate and apply the idiosyncratic and significant characteristics of the structuring and formalization of systems of discrete events in a methodological approach to the building of discrete imitational models. This approach is based on studying the particular system, beginning with a general overview and then ...
Stoyan N. Kapralov, Valentina Dyankova
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Discrete-event dynamic systems

IEEE Transactions on Control Systems Technology, 1999
The supervisory control theory of discrete-event dynamic systems (DEDS), first introduced by Ramadge and Wonham, is based on an automata concept. Given a process, the objective of this theory is to design a supervisor in such a way that the process coupled with the supervisor behaves according to various constraints.
François Charbonnier, Hassane Alla, René David   +2 more
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Discrete-event simulation in Ada

Proceedings of the 1987 annual ACM SIGAda international conference on Ada - SIGAda '87, 1987
This paper presents two approaches for doing discrete-event simulation in Ada. One approach is based on coroutines, and the other solely uses the pseudo-parallel execution scheme of Ada tasks. Concerning coroutines, we present two techniques to implement them.
C. Amiguet, André Schiper
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Discrete-event simulation and the event horizon

ACM SIGSIM Simulation Digest, 1994
The event horizon is a very important concept that is useful for both parallel and sequential discrete-event simulations. By exploiting the event horizon, parallel simulations can process events in a manner that is risk-free (i.e., no antimessages) in adaptable “breathing” time cycles with variable time widths.
openaire   +1 more source