... contains 11 activity categories: basketball shooting, biking/cycling, diving, golf swinging, horseback riding, soccer juggling, swinging, tennis swinging, trampoline jumping, volley ball spiking, ... bending downwards, running, walking, skipping, jumping-jack, jumping, forward, jumping in place, galloping sideways, waving with two hands, and waving with one hand The backgrounds are static and ... Does Unsupervised Pre-training Help Deep Learning?‖ The research indicates that pre-training is a kind of regularization mechanism, by minimizing variance and introducing a bias towards configurations...