The Expanded Invasive Weed Optimization Metaheuristic for Solving Continuous and Discrete Optimization Problems

Table 2

The exIWO parameters used for the minimization of numerical functions.

Description	Griewank (𝑛=10)	Griewank (𝑛=20, 30)	Rastrigin	Rosenbrock
Population cardinality	{20, 40, 80, 160}
Number of iterations (stop criterion)	{1000, 1500, 2000}
Initialization of the first population	Random
Max. number of seeds for a weed 𝑆max	5	5	3	6
Min. number of seeds for a weed 𝑆min	0	0	1	0
Initial value of standard deviation 𝜎init	25	75	25	2.5
Final value of standard deviation 𝜎fin	0.001	0.005	0.025	0.0075
Nonlinear modulation factor 𝑚	5	4.5	3	4.75
Number 𝑘 of neighbours and neighbourhoods examined during the rolling down	1	1	1	1
Probability of the dispersing 𝑃disp	0.7	0.3	0.8	0.1
Probability of the spreading 𝑃spr	0.2	0.2	0	0.1
Probability of the rolling down 𝑃roll	0.1	0.5	0.2	0.8
Selection method	Global	Global	Global	Family-based