Showing papers by "Roberto Candela published in 2010"
01 Jun 2010
TL;DR: The authors propose the use of the Levy probability distribution as leading mechanism for solutions differentiation in an efficient and bio-inspired optimization algorithm, ant colony optimization in continuous domains, ACOR, and properly introduced in the solution construction step.
Abstract: In this paper, the authors propose the use of the Levy probability distribution as leading mechanism for solutions differentiation in an efficient and bio-inspired optimization algorithm, ant colony optimization in continuous domains, ACOR. In the classical ACOR, new solutions are constructed starting from one solution, selected from an archive, where Gaussian distribution is used for parameter diversification. In the proposed approach, the Levy probability distributions are properly introduced in the solution construction step, in order to couple the ACOR algorithm with the exploration properties of the Levy distribution. The proposed approach has been tested on mathematical test functions and on a real world problem of structural engineering, the composite laminates buckling load maximization. In the latter case, as in many other cases in real world problems, the function to be optimized is multi-modal, and thus the exploration ability of the Levy perturbation operator allow the attainment of better results.
13 citations
Patent•
30 Dec 2010
TL;DR: In this paper, a method of locating incipient faults that generate partial discharges in an AC power distribution system is disclosed, comprising the steps of detecting at least one spike (21) in a PD pattern (pC) generated by such system (10); getting the voltage wave (kV) of the AC power in the system; detecting a phase (f) of such spike(21) with respect to the voltage(kV), where such phase(f) is below a predetermined threshold (f 0).
Abstract: A method of locating incipient faults that generate partial discharges in an AC power distribution system is disclosed, comprising the steps of: - detecting at least one spike (21) in a PD pattern (pC) generated by such system (10); - getting the voltage wave (kV) of the AC power in the system; - detecting a phase (f) of such spike (21) with respect to the voltage (kV) of the AC power; - locating an incipient fault (20) where such phase (f) is below a predetermined threshold (f0). An apparatus comprising at least one sensor of electrical pulses, means for getting a synchronism signal with a power supply of the power distribution system, and modules adapted to carry out the method is also disclosed.
9 citations