Machine learning 6 Support vector machine 5 CNN 4 Angle stability 3 Deep learning 3 Manufacture 3 Milling (machining) 3 SVM 3 Support vector machines 3 Surface roughness 3 Aluminum alloys 2 Artificial intelligence 2 Classification 2 Classification (of information) 2 Controllers 2 Conventional-PI controller 2 Design and Development 2 Electric power transmission 2 Electric welding 2 Feature extraction 2 Friction 2 Friction stir welding 2 Image classification 2 Image processing 2 Kerf width 2 Learning systems 2 Milling machines 2 Particle Swarm Optimization 2 Particle swarm optimization 2 Particle swarm optimization (PSO) 2