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- W2954428299 abstract "Boosting as gradient descent algorithms is one popular method in machine learning. In this paper a novel Boosting-type algorithm is proposed based on restricted gradient descent with structural sparsity control whose underlying dynamics are governed by differential inclusions. In particular, we present an iterative regularization path with structural sparsity where the parameter is sparse under some linear transforms, based on variable splitting and the Linearized Bregman Iteration. Hence it is called emph{Split LBI}. Despite its simplicity, Split LBI outperforms the popular generalized Lasso in both theory and experiments. A theory of path consistency is presented that equipped with a proper early stopping, Split LBI may achieve model selection consistency under a family of Irrepresentable Conditions which can be weaker than the necessary and sufficient condition for generalized Lasso. Furthermore, some $ell_2$ error bounds are also given at the minimax optimal rates. The utility and benefit of the algorithm are illustrated by several applications including image denoising, partial order ranking of sport teams, and world university grouping with crowdsourced ranking data." @default.
- W2954428299 created "2019-07-12" @default.
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- W2954428299 date "2017-04-16" @default.
- W2954428299 modified "2023-09-23" @default.
- W2954428299 title "Boosting with Structural Sparsity: A Differential Inclusion Approach" @default.
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- W2954428299 doi "https://doi.org/10.48550/arxiv.1704.04833" @default.
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