Grey Wolf Optimizer Based on Powell Local Optimization Method for Clustering Analysis

Algorithm 3

PGWO algorithm.

 Initialize the grey wolf population and parameters

 Calculate the fitness of population

 Find the first three agents , ,

While ( < Max number of iterations)

 Update the position of the current search agent by (4)

 If , choose current best solution as a starting point and generate a new solution by Powell’s

 method as illustrated Algorithm 2. If , replace with , otherwise, go to Step

 Calculate the fitness of population

   Update , ,

End While

 Return