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A novel chaotic salp swarm algorithm for global optimization and feature selection

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Abstract

Salp Swarm Algorithm (SSA) is one of the most recently proposed algorithms driven by the simulation behavior of salps. However, similar to most of the meta-heuristic algorithms, it suffered from stagnation in local optima and low convergence rate. Recently, chaos theory has been successfully applied to solve these problems. In this paper, a novel hybrid solution based on SSA and chaos theory is proposed. The proposed Chaotic Salp Swarm Algorithm (CSSA) is applied on 14 unimodal and multimodal benchmark optimization problems and 20 benchmark datasets. Ten different chaotic maps are employed to enhance the convergence rate and resulting precision. Simulation results showed that the proposed CSSA is a promising algorithm. Also, the results reveal the capability of CSSA in finding an optimal feature subset, which maximizes the classification accuracy, while minimizing the number of selected features. Moreover, the results showed that logistic chaotic map is the optimal map of the used ten, which can significantly boost the performance of original SSA.

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Author information

Authors and Affiliations

  1. Faculty of Computers and Information, Cairo University, Giza, Egypt

    Gehad Ismail Sayed

  2. Scientific Research Group in Egypt, Giza, Egypt

    Gehad Ismail Sayed

  3. Faculty of Computers and Information, Helwan University, Helwan, Egypt

    Ghada Khoriba & Mohamed H. Haggag

Authors
  1. Gehad Ismail Sayed
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  2. Ghada Khoriba
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  3. Mohamed H. Haggag
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Corresponding author

Correspondence to Gehad Ismail Sayed.

Appendix A: List of benchmark functions

Appendix A: List of benchmark functions

Table 12 Definition of unimodal benchmark functions
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Table 13 Definition of multimodal benchmark functions
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Table 14 Properties of unimodal benchmark functions, lb denotes lower bound, ub denotes upper bound, dim denotes dimensions, opt denotes optimum point
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Table 15 Properties of multimodal benchmark functions, lb denotes lower bound, ub denotes upper bound, dim denotes dimensions, opt denotes optimum point
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Sayed, G.I., Khoriba, G. & Haggag, M.H. A novel chaotic salp swarm algorithm for global optimization and feature selection. Appl Intell 48, 3462–3481 (2018). https://doi.org/10.1007/s10489-018-1158-6

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