An improved multi-objective particle swarm optimizer with adaptive diversity maintenance is proposed(ADMMOPSO for short).In ADMMOPSO,the diversity maintenance threshold value(λα) is introduced to control the non-inferior solution diversity.When the diversity maintenance value is equal or more than λα,the selection strategy of the global best performing particle based on the grid is introduced to increase the probability of convergence to the true Pareto front and improve the diversity.Through extensive comp...