A Decomposition-Based Unified Evolutionary Algorithm for Many-Objective Problems Using Particle Swarm Optimization

Algorithm 2

Personal best selection.

Input: The th particle ; the repository for , ;

  the current operating group .

Output:

 (1) Update personal repository .

 (2) Select the memories in whose leading index

     belong to the as the personal

     best candidates. The number of the candidates is .

 (3) if then Select randomly

   from .

 (4) else Select whose index is a minority

   in from candidates.

 (5) end if