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自适应提升（Adaboost）是一种广泛使用的基于决策树桩（Decision stump: Threshold isassigned and the Prediction is made by the threshold.）的boosting方法。 但是在Adaboost中并不是盲目地重复这种方法。 建立了多个算法，这些算法依次更新它们的权值，并在做出最准确的估计时发挥各自的作用。 计算了每种算法的错误率。 权值被更新，因此被引用到第二种算法中。 第二个算法对模型进行分类，像第一个模型一样更新权重，并将其转移到第三个算法。 这些过程一直持续 …

The consumption of low glycemic index (LGI) foods before exercise results in slower and more stable glycemic increases. Besides maintaining an adequate supply of energy during exercise, this response may favor an increase in fat oxidation in the ...

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2023年3月9日 · LightGBM是由微软提出的一种基于Histogram算法的Gradient Boosting框架。 它通过对样本特征值进行离散化，将连续特征离散化为有限个整数，从而将高维稀疏数据转化为低维稠密数据，从而加速了训练速度。 相比XGBoost，LightGBM的最大优势在于其快速的训练速度和较小的内存占用，这主要得益于其采用了基于直方图的 决策树 算法和局部优化等技术。 LightGBM的核心思想是在构造决策树时，将连续特征离散化为若干个桶，然后将每个桶作为 …

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