Results 11 to 20 of about 7,955,705 (309)
Periodic and Near-Periodic Structures [PDF]
Shock and Vibration, 1995 Extensive work has been done on the vibration characteristics of perfectly periodic structures. This article reviews the different methods of analysis from several fields of study, for example solid-state physics and civil, mechanical, and aerospace engineering, used to determine the effects of disorder in one-dimensional (1-D) and 2-D periodic ...
S. S. Mester, H. Benaroya
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On Periodicity Detection and Structural Periodic Similarity [PDF]
Proceedings of the 2005 SIAM International Conference on Data Mining, 2005 This work motivates the need for more flexible structural similarity measures between time-series sequences, which are based on the extraction of important periodic features. Specifically, we present non-parametric methods for accurate periodicity detection and we introduce new periodic distance measures for time-series sequences.
Michail Vlachos +2 more
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Periodic Auxetics: Structure and Design [PDF]
The Quarterly Journal of Mechanics and Applied Mathematics, 2017 Materials science has adopted the term of auxetic behavior for structural deformations where stretching in some direction entails lateral widening, rather than lateral shrinking. Most studies, in the last three decades, have explored repetitive or cellular structures and used the notion of negative Poisson's ratio as the hallmark of auxetic behavior ...
Borcea, Ciprian S., Streinu, Ileana
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DOUBLY PERIODIC TEXTILE STRUCTURES [PDF]
Journal of Knot Theory and Its Ramifications, 2009 Knitted and woven textile structures are examples of doubly periodic structures in a thickened plane made out of intertwining strands of yarn. Factoring out the group of translation symmetries of such a structure gives rise to a link diagram in a thickened torus, as in [2]. Such a diagram on a standard torus in S
Morton, H. R., Grishanov, S. A.
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Bifurcations of periodic orbits and uniform approximations. [PDF]
, 1997 We derive uniform approximations for contributions to Gutzwiller's periodic-orbit sum for the spectral density which are valid close to bifurcations of periodic orbits in systems with mixed phase space.
Schomerus, Henning, Sieber, Martin
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Computation of Kalman Decompositions of Periodic Systems [PDF]
, 2003 We consider the numerically reliable computation of reachability and observability Kalman decompositions of a periodic system with time-varying dimensions.
A. Varga +3 more
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On computing the zeros of periodic systems [PDF]
, 2002 We present an effcient and numerically reliable approach to compute the zeros of a periodic system. The zeros are defined in terms of the transfer-function matrix corresponding to an equivalent lifted statespace representation as constant system.
Dooren, P. Van +6 more
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Computation of Generalized Inverses of Periodic Systems [PDF]
, 2004 We address the numerically reliable computation of generalized inverses of periodic systems. The underlying inverses are defined via the corresponding lifted repesentations.
A. Varga, Varga, Andras
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Optimal periodic output feedback control: a continuous-time approach [PDF]
, 2007 : This paper addresses the problem of optimal static output feedback control of linear periodic systems. The proposed approach, which allows to deal with both stable and unstable open loop systems, relies on a continuous-time formulation of the control ...
VIGANO', LUCA +8 more
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IEEE Open Journal of Antennas and Propagation, 2020 Functional post-wall waveguides and waveguide based compact passive circuits - namely bandpass filters - that are formed by introducing additional metallic or dielectric posts inside the post-wall waveguide are analyzed.
Arkadi Akopian +8 more
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