Transfer learning

Instance-based transfer learning

Feature-based transfer learning

Model-based transfer learning

Relation-based transfer learning

Heterogeneous transfer learning

Adversarial transfer learning

Transfer learning in reinforcement learning

Multi-task learning

Transfer learning theory

Transitive transfer learning

AutoTL : learning to transfer automatically

Few-shot learning

Lifelong machine learning

Privacy-preserving transfer learning

Transfer learning in computer vision

Transfer learning in natural language processing

Transfer learning in dialogue systems

Transfer learning in recommender systems

Transfer learning in bioinformatics

Transfer learning in activity recognition

Transfer learning in urban computing.