منابع مشابه
Relaxed Krylov subspace approximation
Recent computational and theoretical studies have shown that the matrix-vector product occurring at each step of a Krylov subspace method can be relaxed as the iterations proceed, i.e., it can be computed in a less exact manner, without degradation of the overall performance. In the present paper a general operator treatment of this phenomenon is provided and a new result further explaining its...
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Community detection is an important information mining task in many fields including computer science, social sciences, biology and physics. For increasingly common large network data sets, global community detection is prohibitively expensive, and attention has shifted to methods that mine local communities, i.e. methods that identify all latent members of a particular community from a few lab...
متن کاملKrylov Subspace Approximation for TEM Simulation in the Time Domain
Forward transient electromagnetic modeling requires the numerical solution of a linear constant-coefficient initial-value problem for the quasi-static Maxwell equations. After discretization in space this problem reduces to a large system of ordinary differential equations, which is typically solved using finite-difference time-stepping. We compare standard time-stepping schemes such as the exp...
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Zusammenfassung Dieser Beitrag behandelt die Approximation linearer verteilt-parametrischer Systeme zweiter Ordnung mittels eines Galerkin-Ansatzes. Das resultierende endlich-dimensionale Approximationsmodell besitzt ebenfalls die Struktur zweiter Ordnung und ist wie das Originalsystem asymptotisch stabil und passiv. Es wird gezeigt, wie die Freiheitsgrade der Galerkin-Approximation zu wählen s...
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In the simulation of continuous events, such as the ow of a uid through a pipe, or the ow of air around an aircraft, one usually imposes a grid over the area of interest and one restricts oneself to the computation of relevant parameters, for instance the pressure or the velocity of the ow or the temperature, in the gridpoints. Physical laws lead to approximate relations between these parameter...
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ژورنال
عنوان ژورنال: PAMM
سال: 2005
ISSN: 1617-7061,1617-7061
DOI: 10.1002/pamm.200510373