Swarm Intelligence Algorithms

210 Grey Wolf Optimizer

16.2.5 Attacking prey (exploitation)

The hunting process is finished by attacking the prey. This process can be

mathematically modeled as follows. When |A| < 1, the wolves attack towards

the prey, where the vector



A is a random value in interval [−2a, 2a] and a is

decreased from 2 to 0 over the course of iterations.

16.2.6 Search for prey (exploration)

At the beginning of the search each wolf updates its position according to the

position of α, β and δ in order to search for prey and converge to attack prey.

This process is called diversification or exploration. The mathematical model

of the exploration is defined as follows. When ...