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Your search keyword '"Lisboa, Adriano C."' showing total 26 results
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26 results on '"Lisboa, Adriano C."'

6. A Proposed Extreme Learning Machine Pruning Based on the Linear Combination of the Input Data and the Output Layer Weights

Author

Tavares, Leonardo D., Saldanha, Rodney R., Vieira, Douglas A. G., Lisboa, Adriano C., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Kobsa, Alfred, Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Corchado, Emilio, editor, Lozano, José A., editor, Quintián, Héctor, editor, and Yin, Hujun, editor

Published
2014
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12. Monotonically improving Yagi-Uda conflicting specifications using the dominating cone line search method

Author

Lisboa, Adriano C., Vieira, Douglas A.G., Vasconcelos, Joao A., Saldanha, Rodney R., and Takahashi, Ricardo H.C.

Subjects
Antennas (Electronics) -- Analysis, Mathematical optimization -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

Given a non-optimal Yagi-Uda antenna, this paper presents a technique to improve simultaneously and monotonically all its conflicting specifications. This is possible using the multiobjective optimization technique called Dominating Cone Line Search. Results for a 6 elements antenna, considering 3 conflicting specifications in 3 different frequencies, thus, a 9 objectives optimization problem, is presented. Index Terms--Multi-objective optimization and design, Yagi-Uda antenna.

Published
2009

13. Efficient algorithms and data structures for element-free Galerkin method

Author

Parreira, Guilherme F., Fonseca, Alexandre R., Lisboa, Adriano C., Silva, Elson J., and Mesquita, Renato C.

Subjects
Algorithms -- Usage, Data structures -- Usage, Domain structure -- Research, Algorithm, Business, Electronics, Electronics and electrical industries
Abstract

The element-free Galerkin method (EFG) has specific characteristics that require the usage of techniques and data structures in order to provide efficient calculation. This paper address two problems concerning the EFG implementation. The point location problem, which must find in which subdomain the integration point is located, and the influence domain problem, which must find the nearest nodes to build an influence domain and construct the shape functions. This work proposes the use of new data structures and algorithms in order to solve these problems, speeding up the method and providing a fast and correct influence domain construction. Index Terms--Data structures, element-free Galerkin, kd-tree, meshless, trapezoidal map.

Published
2006

26. Discretization of the CFS-PML for computational electromagnetics using discrete differential forms.

Author

Moura, Alex. S., Saldanha, Rodiney R., Silva, Elson J., Pantoja, Mario F., Lisboa, Adriano C., and Facco, Werley G.

Subjects
COMPUTATIONAL electromagnetics, NUMERICAL analysis, DISCRETE systems, ALGORITHMS, MAXWELL equations, FARADAY'S law
Abstract

A new numerical discretization of the complex frequency shifted-perfectly matched layer (CFS-PML) is presented for truncation of open domains. This discretization is based on the theory of discrete differential forms applied to electromagnetism, which guarantees both the simplification of the algorithms and a more elegant formulation of expression. The curl Maxwell's equations are solved in time domain in terms of electric e magnetic fields. The Ampere-Maxwell law with, the constitutive relations included through the Hodge operator, is discretized in space by applying the Galerkin method. Conversely, the Faraday law is represented by topological relations via incidence matrix. The time domain discretization uses the leap-frog scheme with a recursive convolution inside PML region. Two examples are shown, the first one to validate the CFS-PML procedure and the second one to solve a typical ground penetrating radar scenario which include a lossy media. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:351-357, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27298 [ABSTRACT FROM AUTHOR]

Published
2013
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