مقایسهٔ روش‌ها

	درخت تصمیم نیمه‌نظارت‌شده	گرادیان بوستینگ (Gradient Boosting)
حوزه	یادگیری ماشین	یادگیری ماشین
خانواده	Machine learning	Machine learning
سال پیدایش	2000s	2001
پدیدآور	Various (Levin & Shapiro; Zhu & Goldberg lineage)	Friedman, J. H.
نوع	Semi-supervised classifier / regressor	Ensemble (sequential boosting of decision trees)
منبع بنیادین	Levin, E. & Shapiro, E. (2000). Learning Decision Trees from Semi-labeled Examples. Proceedings of the ICML Workshop on Attribute-Value and Relational Learning.	Friedman, J. H. (2001). Greedy Function Approximation: A Gradient Boosting Machine. Annals of Statistics, 29(5), 1189–1232.
نام‌های دیگر	SSDT, semi-supervised tree induction, self-training decision tree, label-propagation tree	Gradient Boosting (GBM), GBM, gradient boosted trees, gradient boosting machine
مرتبط	4	5
خلاصه	A Semi-supervised Decision Tree extends standard decision tree induction — such as CART or C4.5 — to exploit unlabeled observations alongside the labeled training set. By iteratively assigning tentative labels to unlabeled data and incorporating them into the growing or splitting process, the algorithm can achieve better accuracy than a fully supervised tree trained on the labeled subset alone, which is especially valuable when labeling is expensive or time-consuming.	Gradient Boosting is an ensemble learning method, formalised by Jerome H. Friedman in 2001, that combines a sequence of weak learners — typically shallow decision trees — so that each new tree is fitted to minimise the residual errors of the trees before it. It is the core algorithm behind popular implementations such as XGBoost, LightGBM and CatBoost.