The grey wolf finish the hunt by attacking the prey when it stop moving.
The vector A ~ is a random value in interval [−2a, 2a], where a is decreased from
2 to 0 over the course of iterations. When |A| < 1, the wolves attack towards the prey, which represents an exploitation process.
0.1.5. Search for prey (exploration)
The exploration process in GWO is applied according to the position α, β and δ, that diverge from each other to search for prey and converge to attack prey. The exploration process is modeled mathematically by utilizing A ~ with random values greater than 1 or less than -1 to oblige the search agent to diverge from the prey. When |A| > 1, the wolves are forced to diverge from the prey to