手法を比較

	オンライン学習	Federated Learning（連合学習）
分野	機械学習	プライバシー
系統	Machine learning	Machine learning
提唱年	1958–2000s	2017
提唱者	Rosenblatt, F.; Littlestone, N.; Shalev-Shwartz, S. (key contributors)	McMahan et al.
種類	Learning paradigm (sequential model update)	Distributed privacy-preserving machine learning
原典	Shalev-Shwartz, S. (2011). Online Learning and Online Convex Optimization. Foundations and Trends in Machine Learning, 4(2), 107–194.	McMahan, B., Moore, E., Ramage, D., Hampson, S., & Arcas, B. A. (2017). Communication-efficient learning of deep networks from decentralized data. Artificial Intelligence and Statistics, 1273–1282.
別名	incremental learning, sequential learning, streaming learning, online machine learning	Collaborative Learning, Decentralized Learning, FedAvg, Federe Öğrenme
関連	6	3
概要	Online learning is a machine learning paradigm in which a model is updated incrementally as each new data point arrives, rather than being trained once on a fixed dataset. It is essential when data streams continuously, storage is limited, or the underlying distribution shifts over time. Theoretical performance is measured by cumulative regret relative to the best fixed predictor in hindsight.	Federated Learning is a distributed machine learning paradigm introduced by McMahan et al. in 2017 in which a global model is trained collaboratively across multiple decentralized clients — such as mobile devices or hospital systems — without ever transferring raw data to a central server. Each participant computes model updates locally using its private data; only those updates, not the underlying data, are communicated and aggregated by the server to improve the shared model.