Table 1: Key PSO vocabulary.

Some key terms used to describe PSO

Particle/agentOne single individual in the swarm
Location/positionAn agent’s N-dimensional coordinates which represents a solution to the problem
SwarmThe entire collection of agents
Fitness or costA single number representing the goodness of a given solution
Personal best (pbest)The location in parameter space of the best fitness returned for a specific agent
Global best (gbest)The location in parameter space of the best fitness returned for the entire swarm
The maximum allowed velocity in a given direction