Back-propagation neural networks 12 Neural networks 10 Backpropagation 9 History of engineering and technology 6 Neural network model 4 Technology: general issues 4 back propagation neural network 4 BP neural network 3 Mean square error 3 Optimization 3 article 3 human 3 Auto-regressive 2 Back propagation neural networks 2 Bioluminescence 2 Complex nonlinear system 2 Decision trees 2 E-learning 2 Environmental science, engineering and technology 2 Firefly algorithms 2 Forecasting 2 Joints (anatomy) 2 Logical modeling 2 Muscle 2 Neural network models 2 Neural-networks 2 Nonlinear systems 2 Particle swarm optimization (PSO) 2 Performance 2 Students 2