We study reparametrization-invariant systems, mainly the relativistic particle and its D-dimensional extended object generalization d-brane. The corresponding matter Lagrangians naturally contain background interactions, like electromagnetism and gravity. For a dbrane that doesn’t alter the background fields, we define non-relativistic equations assuming integral sub-manifold embedding of the d...

0377-2217/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.ejor.2010.01.035 * Corresponding author. Tel.: +39 51 2093028; fax: E-mail addresses: [email protected] (Z. Na (P. Toth), [email protected] (L. Galli). In this paper we propose a new heuristic algorithm to solve the unicost version of the well-known set covering problem. The method is based on the electromagnetism metaheuris...

In recent years, computational electromagnetism has had a great development thanks to the computational systems speed increase and their cost reduction. With those improvements the mathematical algorithms are able to work properly with more practical EMC issues. The problem that arises many times is to become confident with the results, in other words, to be able to quantitatively validate the ...

Numerical optimization using recurrent finite-element simulations is a promising direction in design of power equipment. Previously, the speed and memory limitations of computers made such an approach unfeasible in comparison with analytical techniques. Recently, exponential improvements in the computer industry induced shifts toward numerical algorithms. The methodology presented here allows a...

These days, Orthogonal Frequency Division Multiplexing (OFDM) is a more attractive technique used in wireless communication systems. It has high capacity of data transmission. The major disadvantage of OFDM is Peak to Average Power Reduction which arises mainly due to increase in number of sub-carriers. Partial transmit sequence (PTS) is one of the best technique among all the proposed techniqu...

Contemporary applications in computational science and engineering often require the solution of linear systems which may be different sizes, shapes, structures. The goal this paper is to explain how two libraries, PETSc HPDDM, have been interfaced order offer end-users robust overlapping Schwarz preconditioners advanced Krylov methods featuring recycling ability deal with multiple right-hand s...

Recently, the use of artificial intelligence based data mining techniques for massive medical data classification and diagnosis has gained its popularity, whereas the effectiveness and efficiency by feature selection is worthy to further investigate. In this paper, we presents a novel method for feature selection with the use of opposite sign test (OST) as a local search for the electromagnetis...