手法を比較

	半教師あり バギング	ラベル伝播
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	2000s	2002
提唱者	Various (Breiman bagging + semi-supervised extensions, 1990s–2000s)	Zhu, X. & Ghahramani, Z.
種類	Semi-supervised ensemble (bagging variant)	Graph-based semi-supervised classification
原典	Bennett, K. P., & Demiriz, A. (1999). Semi-supervised support vector machines. Advances in Neural Information Processing Systems, 11. MIT Press.	Zhu, X., & Ghahramani, Z. (2002). Learning from labeled and unlabeled data with label propagation. Technical Report CMU-CALD-02-107, Carnegie Mellon University.
別名	SS-Bagging, semi-supervised bootstrap aggregating, self-training bagging, bagging with pseudo-labels	LP, label spreading, graph-based semi-supervised learning, harmonic label propagation
関連	4	3
概要	Semi-supervised Bagging extends the classical bagging ensemble to settings where labeled training examples are scarce but large amounts of unlabeled data are available. Base learners trained on labeled data assign pseudo-labels to unlabeled examples; the expanded dataset is then used to grow a diverse ensemble whose aggregated vote is more accurate and more stable than any single model trained on the limited labeled set alone.	Label Propagation is a graph-based semi-supervised learning algorithm introduced by Zhu and Ghahramani in 2002 that spreads class labels from a small set of labeled nodes to a large set of unlabeled nodes by iteratively diffusing label information along the edges of a similarity graph, exploiting the manifold structure of the data.