Open source software 4 Open systems 4 Base matrix 3 Codes (symbols) 3 Coefficient matrix 3 Convolution 3 Convolutional neural network 3 Convolutional neural networks 3 Error correction 3 Humans 3 Information exchanges 3 Internet of things 3 Iterative methods 3 Matrix algebra 3 Matrix factorization 3 Network coding 3 Nonnegative Matrix Factorization 3 Nonnegative matrix factorization 3 Optical resolving power 3 Quick response code 3 Regularisation 3 Secret-sharing 3 Structural regularization 3 Superresolution 3 basis matrix 3 coefficient matrix 3 convolutional neural network 3 human 3 quick response code 3 secret sharing 3