Augmented Lagrangian combined to evolutionary heuristic for energy efficiency in OCDMA networks

Martinez, Cristiane A. Pendeza; Durand, Fábio Renan; Martinez, André Luís Machado; Abrão, Taufik

doi:10.1016/j.osn.2019.100542

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…The augmented Lagrangian optimization method seeks to solve a restricted nonlinear programming problem, solving a more straightforward sequence of problems. As described in [38] one can combine an analytical-iterative technique (ALM) with a quasi-Newton-type method or with an evolutionary heuristic method (PSO) aiming to improve the performance of the hybrid optimization method. Hence, in a combination, each ALM subproblem can be solved approximately by the PSO or by the BFGS, proposed by Broyden, Fletcher, Goldfarb and Shanno [38].…”

Section: F Alm and Hybrid Alpso Algorithmmentioning

confidence: 99%

“…where [α] + = max[0, α]; penalty parameter ρ > 0 and µ ≥ 0 are approximations for Lagrange multipliers; The factor [F ( Θ) − γ k ] + is included in order to use the ALM structure to accelerate the minimization of the fitness function F ( Θ), and the constant γ k represents a value less than or equal to the value of F in the previous ALM iteration. For a detailed analysis of ALM, see [38], [39].…”

Section: F Alm and Hybrid Alpso Algorithmmentioning

confidence: 99%

“…Further analyses and comparisons were aggregated by combining a PSO variant with the ALM, named ALPSO; also the ALM method combined with a quasi-Newton method and the PSO hybridization with the gravitational search method (PSOGSA). Indeed, as suggested in [15], the ALM structure replacing the objective function allows the best fit to the problem, and ultimately provides more information about the solution. Extensive numerical results for these algorithms are analyzed and compared to find the best technique for the parameter estimation problem in threephase induction motors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Parameter Identification in Three-phase Induction Motor Aided by Halton-Chaos-$\beta $-PSO Algorithm

Santana

Martinez

Goedtel

et al. 2023

Preprint

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Evolutionary heuristic algorithms attempt to biologically emulate the adaptive evolutionary nature of living beings via different procedures. This work proposes new mechanisms for improving the performance-complexity tradeoff of the evolutionary Particle Swarm Optimization (PSO) algorithm applied to parameter estimation of a three-phase induction motor problem subject to the operational changing of motor parameters during its operation. The proposed variant, namely the Halton-Chaos-$\beta$-PSO algorithm, resolves the parameter estimation problem faster and with minor errors than the conventional PSO. An analytical-iterative-heuristic variant combining the augmented Lagrangian method (ALM) and PSO (ALPSO) demonstrated good performance-complexity trade-off, particularly under online operation, with instantaneous (on-fly) modification of the motor parameters. Additionally, the ALM combined with a quasi-Newton method and the PSO hybridization with the gravitational search algorithm (PSOGSA) was evaluated. The efficiency and effectiveness of the proposed hybrid analytical-iterative-heuristic methods are corroborated by extensive numerical simulation results, considering heuristic input parameters tuning, which have revealed a remarkable reduction in the error estimation values when the estimation procedure is deployed dynamically in real-time applications.

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Section: F Alm and Hybrid Alpso Algorithmmentioning

confidence: 99%

Section: F Alm and Hybrid Alpso Algorithmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Parameter Identification in Three-phase Induction Motor Aided by Halton-Chaos-$\beta $-PSO Algorithm

Santana

Martinez

Goedtel

et al. 2023

Preprint

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“…In the recent years, optical code division multiple access (OCDMA) technique has attracted much attention due to its ability to permit multiple users sharing the same bandwidth of the channel asynchronously and synchronously through providing each user its own code (Alayedi et al 2020a;Cherifi et al 2019;Alayedi et al 2019;Alayedi et al 2020b;Cherifi et al 2016;Cherifi et al 2018;Gupta and Goel 2017;Abd et al 2014;Nisar 2016). Moreover, this technique has several features like multi data transmission service, high security level, random access user, adaptable and scalable network and packet collisions absence' (Cherifi et al 2019;Durand et al 2016;Durand et al 2012;Martinez et al 2020). As well, OCDMA technique is compatible with both wavelength division multiplexing (WDM) and time division multiple access (TDMA) techniques, so that, it can present a very effective and potential solution for the future optical networks (Mrabet et al 2020).…”

Section: Introductionmentioning

confidence: 99%

A performance investigation of SAC-OCDMA system based on a spectral efficient 2D cyclic shift code for next generation passive optical network

et al. 2021

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A two dimensional spectral/spatial cyclic shift (2D-CS) optical code division multiple access (OCDMA) systems is proposed for a potentially next generation passive optical network (NG-PON) implementation called (2D-CS NG-OCDMA-PON) system. The2D-CS proposed code is characterized by a high capacity and a zero cross correlation property leads to completely eliminating the multiple access interference (MAI) effect that is considered as the main OCDMA system drawback. Firstly, the 2D-CScode construction is investigated from 1D-CS code. Secondly, a system description is provided by exhibiting the transmitter and receiver architecture in the PON context. Analytical analysis reveals that our proposed 2D-CScode outperforms similar codes such as perfect difference (2D-PD) and dynamic cyclic shift (2D-DCS) codes in terms of spectral efficiency, simultaneous network subscribers and data bit rate. In addition, based on numerical analysis 2D-CS NG-OCDMA-PON system shows a good system performance by means of avery low BER and a high Qfactor values equal to10 −26 and 10.41 dB, respectively. Likewise, for four users and free-amplification the achievable reach ability distance of the NG-OCDMA-PON system is 63.21 km, 43.57 km and 33.2 km while Q-factor is equal to 6 dB at a bit rate of 622Mb/s, 1Gb/s and 1.5 Gb/s, respectively. On the other side, according to the system setup the number of single mode fiber (SMF) is reduced to the half compared to other 2D-OCDMA-PON systems based on enhanced multi diagonal (EMD) and single weight ZCC (SWZCC) codes.

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Spectral and energy efficiency tradeoff in optical code division multiple access networks

Martinez

Abrão

2020

Trans Emerging Tel Tech

Self Cite

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A paradigm on the energy efficiency (EE) and spectral efficiency (SE) tradeoff named resource efficiency (RE) exploits the EE‐SE equilibrium, which is formulated as Pareto optimal set based on two objectives balancing power consumption against occupied bandwidth. In optical code division multiple access (OCDMA) networks, the EE‐SE tradeoff is discussed by formulating a multiobjective optimization problem, while solutions are compared by deploying the weighted sum (WS) and ‐Constraint (‐C) scalarization procedures combined with nonlinear programming methods. The generalized RE optimization problem with QoS guarantees for the OCDMA networks is formulated considering that such methods result in the same Pareto boundaries. Theoretical results demonstrate that the obtained numerical optimized solutions are efficient due to the multiobjective characteristics of the optimization problem. Also, considering the numerical tests performed, it is noteworthy that the ‐C procedure found a greater diversity of solutions inside the Pareto front when compared with the WS method.

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Augmented Lagrangian combined to evolutionary heuristic for energy efficiency in OCDMA networks

Cited by 10 publications

References 25 publications

Parameter Identification in Three-phase Induction Motor Aided by Halton-Chaos-$\beta $-PSO Algorithm

Parameter Identification in Three-phase Induction Motor Aided by Halton-Chaos-$\beta $-PSO Algorithm

A performance investigation of SAC-OCDMA system based on a spectral efficient 2D cyclic shift code for next generation passive optical network

Spectral and energy efficiency tradeoff in optical code division multiple access networks

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