Positive-unlabeled classification under class-prior shift: a prior-invariant approach based on density ratio estimation.
Shota NakajimaMasashi SugiyamaPublished in: Mach. Learn. (2023)
Keyphrases
- class labels
- prior knowledge
- training set
- active learning
- supervised learning
- text classification
- decision trees
- unsupervised learning
- support vector
- feature vectors
- support vector machine
- machine learning
- model selection
- feature extraction
- labeled data
- machine learning algorithms
- databases
- document classification
- positive and unlabeled examples