Results 201 to 210 of about 20,309 (231)

Solving inverse obstacle problems using inverse source, equivalence principles and sparsity promotion

open access: closed2017 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2017
This paper introduces a new linear approach for the solution of inverse obstacles problem in case of both penetrable and impenetrable objects. The approach takes advantage from the equivalence principles and from sparsity based regularizations. In particular, thank to the fact that for both high conductivity and dielectric scatterers, induced and ...
M. T. Bevacqua, T. Isernia
openaire   +2 more sources

Sparsity-enhanced equivalent source method for acoustic source reconstruction via the Generalized Minimax-Concave penalty

Mechanical Systems and Signal Processing, 2022
Abstract The Equivalent Source Method (ESM) is a powerful technique for acoustic source reconstruction, which has been widely used in noise control and machinery fault detection. Because the inverse acoustic source reconstruction problem is typically ill-conditioned, regularization techniques are often adopted in ESM to achieve meaningful solutions ...
Ran Wang   +3 more
openaire   +1 more source

Sparsity considerations in power system equivalents

Proceedings of the IEEE, 1980
It is shown that for practical power system applications the amount of network reduction to be performed is a function of both the topology of the network and the impedance of the equivalent branches. It is also shown that it is not sufficient to consider only the topological characteristics of the network to be equivalized in deciding about the nodes ...
E.C. Housos, G. Irisarri
openaire   +1 more source

Equivalence Probability and Sparsity of Two Sparse Solutions in Sparse Representation

IEEE Transactions on Neural Networks, 2008
This paper discusses the estimation and numerical calculation of the probability that the 0-norm and 1-norm solutions of underdetermined linear equations are equivalent in the case of sparse representation. First, we define the sparsity degree of a signal.
Yuanqing, Li   +4 more
openaire   +2 more sources

Extension of sound field separation technique based on the equivalent source method in a sparsity framework

Journal of Sound and Vibration, 2019
Abstract The equivalent source method (ESM)-based sound field separation technique has been successfully introduced into near-field acoustic holography as a preprocessing tool to eliminate the influence of disturbing sources or reflections from the opposite side of the array.
Chuan-Xing Bi   +3 more
openaire   +1 more source

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