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Materials & Design, 2019 Reticulated foams are widely used in noise control applications. However, difficulties in controlling the foaming process makes it difficult to control the microstructure and consequently the absorption characteristics of stochastic foams.
Sagar Deshmukh +2 more
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Observational Evidence for Persistent Microstructure Periodicities [PDF]
International Astronomical Union Colloquium, 1992 AbstractBy using Cross Spectral Density processing between high time resolution radio intensity observations of pulsars made simultaneously at two different receiver frequencies, several high frequency periodicities that are persistent over many pulses were discovered. A possible interpretation in terms of neutron star vibration models is discussed.
Jeffrey Foster Friedman +1 more
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On computing inner-outer factorizations of periodic systems [PDF]
, 2013 A numerically reliable state space algorithm is proposed for computing inner-outer factorizations of causal periodic descriptor systems. The main computational ingredients are the computation of a special condensed Kronecker-like form of periodic ...
Varga, Andreas, Andreas Varga
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Solution of Positive Periodic Discrete Lyapunov Equations with Applications to the Balancing of Periodic Systems. [PDF]
, 1997 The discrete-time positive periodic Lyapunov equations have important applications in the balancing and potentially also in the model reduction of discrete-time periodic systems.
A. Varga, Varga, A., Andreas Varga
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Micro-diffractive optical element arrays for beam shaping [PDF]
EPJ Web of Conferences, 2022 We describe the design of Fourier type array generators and beam shapers as periodic configurations of refractive-diffractive optical elements in microscale to provide specific beam shaping and imaging functionaliies.
Gharbi Ghebjagh Shima +2 more
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Computation of transfer function matrices of periodic systems [PDF]
, 2002 We present a numerical approach to evaluate the transfer function matrices of a periodic system corresponding to lifted state-space representations as constant systems.
A. Varga, Varga, Andras
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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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Effect of microstructure on dynamic compressive behavior of cellular materials [PDF]
EPJ Web of Conferences, 2021 It is known that the microstructure of cellular materials has a significant impact on their compressive properties. To study these phenomena, a hierarchical Poisson disk sampling algorithm and Voronoi partitioning were used to create a 3D numerical ...
Tateyama Kohei, Watanabe Keiko
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PERIODIC WAVES IN MICROSTRUCTURED SOLIDS AND INVERSE PROBLEMS
Mathematical Modelling and Analysis, 2012 Conditions for the existence of periodic and solitary waves in 1D microstructured solid of Mindlin type are deduced. Inverse problems to determine material properties are solved.
Sertakov, Ivan, Janno, Jaan
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On computing minimal realizations of periodic descriptor systems [PDF]
, 2007 : We propose computationally efficient and numerically reliable algorithms to compute minimal realizations of periodic descriptor systems. The main computational tool employed for the structural analysis of periodic descriptor systems (i.e., reachability
Andras Varga, Varga, Andreas
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