elephant herding optimization evolutionary algorithm evolutionary algorithms (EAs) evolutionary computation global optimization memetic algorithm particle swarm optimization swarm intelligence whale optimization algorithm 0-1 knapsack problem 0-1 knapsack problems ?-Hilbert space Artificial bee colony CEC2013 benchmarks DE algorithm DV-Hop algorithm EHO Friedman test NSGA-II-DV-Hop Pareto optimality Pareto-front Q-learning SPEA 2 Technology: general issues WOA Wilcoxon test Y conditional cloud generator acceleration search adaptive multi-swarm adaptive weight