手法を比較

	正則化連邦学習	正則化勾配ブースティング
分野	機械学習	機械学習
系統	Machine learning	Machine learning
提唱年	2020	2001 (gradient boosting); 2016 (explicit L1/L2 regularization in XGBoost)
提唱者	Li, T. et al. (FedProx); McMahan, B. et al. (FedAvg base)	Chen, T. & Guestrin, C. (building on Friedman, J. H.)
種類	Distributed optimization with regularization	Regularized ensemble (additive tree model)
原典	Li, T., Sahu, A. K., Zaheer, M., Sanjabi, M., Talwalkar, A., & Smith, V. (2020). Federated Optimization in Heterogeneous Networks. Proceedings of Machine Learning and Systems (MLSys), 2, 429–450.	Chen, T. & Guestrin, C. (2016). XGBoost: A scalable tree boosting system. Proceedings of the 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, 785–794.
別名	FedProx, federated learning with regularization, proximal federated learning, penalized federated optimization	penalized gradient boosting, shrinkage-regularized boosting, XGBoost-style regularization, L1/L2 gradient boosting
関連	6	6
概要	Regularized federated learning extends the federated learning framework by adding penalty terms to each client's local objective, anchoring local updates closer to the global model. The canonical formulation — FedProx — adds a proximal term that controls how far any single client can drift, improving convergence and stability when client data distributions differ substantially.	Regularized gradient boosting extends the classic additive tree ensemble (Friedman 2001) by embedding L1 and L2 penalty terms directly into the training objective, along with a complexity penalty on tree size. Popularized by XGBoost (Chen & Guestrin 2016), this framework reduces overfitting and improves generalization compared to unpenalized boosting, while retaining the method's characteristic accuracy on tabular data.