grey wolf optimizer Adaptation strategies 1 Classification (of information) 1 Combinatorial optimization 1 Combinatorial optimization problems 1 Dynamic mutation 1 Feature Selection 1 Features selection 1 Gray wolf optimizer 1 Gray wolves 1 Heuristic algorithms 1 Machine-learning 1 Optimizers 1 Population adaptation strategy 1 Pre-processing step 1 SVR model 1 automobile sales prediction 1 back-stepping controller 1 classification 1 dynamic mutation 1 feature selection 1 fractional order proportional integral derivative controller 1 grey correlation analysis 1 hybrid particle swarm grey wolf optimizer 1 hybrid whale grey wolf optimizer 1 meta-heuristic 1 optimization algorithms for robotics 1 particle swarm optimizer 1 population adaptation strategy 1 trajectory tracking 1