From: Sleep stage classification using extreme learning machine and particle swarm optimization for healthcare big data
Feature mask
Total hidden nodes
\(p_{i}^{1}\)
\(\ldots p_{i}^{k} \ldots\)
\(p_{i}^{n}\)
\(\ldots p_{i}^{i} \ldots\)
\(p_{i}^{{n_{c} }}\)