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 Statistical Learning








On the Target-kernel Alignment: a Unified Analysis with Kernel Complexity

Neural Information Processing Systems

Y et, under the strongly-aligned regime, KM suffers the saturation effect, while TKM can be continuously improved as the alignment becomes stronger. This further implies that TKM has a strong ability to capture the strong alignment and provide a theoretically guaranteed solution to eliminate the phenomena of saturation effect.



Minimal Variance Sampling in Stochastic Gradient Boosting

Neural Information Processing Systems

Differentsamplingapproaches were proposed, where probabilities are not uniform, and it is not currently clear which approach is the most effective. In this paper, we formulate the problem of randomization in SGB in terms of optimization of sampling probabilities to maximize the estimation accuracy of split scoring used to train decision trees.