Bilevel Optimization Using Stationary Point of Lower-Level Objective Function for Discriminative Basis Learning in Nonnegative Matrix Factorization.
Hiroaki NakajimaDaichi KitamuraNorihiro TakamuneHiroshi SaruwatariNobutaka OnoPublished in: IEEE Signal Process. Lett. (2019)
Keyphrases
- lower level
- nonnegative matrix factorization
- objective function
- higher level
- stationary points
- optimization problems
- unsupervised learning
- learning algorithm
- optimality conditions
- low level
- linear programming
- high level
- reinforcement learning
- active learning
- nonlinear programming
- upper level
- constrained optimization
- optimal solution
- bilevel programming