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arXiv 1502.02599cs.LG
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用于预测的自适应随机SubSpace学习(RSSL)算法

Adaptive Random SubSpace Learning (RSSL) Algorithm for Prediction

Rochester Institute of Technology(罗切斯特理工学院)

Mohamed Elshrif, Ernest Fokoue

摘要:

本文提出了一种新的自适应随机子空间学习算法(RSSL)。这个新的框架是灵活的,它可以适应任何学习技术。在本文中,我们测试了回归和分类问题的算法。此外,我们提供了各种加权方案,以增加所开发的算法的鲁棒性。这些不同的加权风味进行了评估,以及在模拟的真实世界的数据集,考虑的情况下,功能(属性)和实例(样本)之间的比例是大的,反之亦然。新算法的框架由多个阶段组成:首先,使用相关系数和F-统计量统计测量来计算数据集上所有特征的权重。其次,从数据集中随机抽取n个具有替换的样本。第三,定期进行Bootstrap抽样(装袋)。第四,不替换地绘制所选变量的指数。该决定是根据启发式子空间方案。第五,呼叫基础学习者并建立模型。第六,使用该模型对测试数据集进行预测。实验结果表明,自适应RSSL算法在大多数情况下比同义词(常规)机器学习算法具有更大的优越性。

英文摘要:

We present a novel adaptive random subspace learning algorithm (RSSL) for prediction purpose. This new framework is flexible where it can be adapted with any learning technique. In this paper, we tested the algorithm for regression and classification problems. In addition, we provide a variety of weighting schemes to increase the robustness of the developed algorithm. These different wighting flavors were evaluated on simulated as well as on real-world data sets considering the cases where the ratio between features (attributes) and instances (samples) is large and vice versa. The framework of the new algorithm consists of many stages: first, calculate the weights of all features on the data set using the correlation coefficient and F-statistic statistical measurements. Second, randomly draw n samples with replacement from the data set. Third, perform regular bootstrap sampling (bagging). Fourth, draw without replacement the indices of the chosen variables. The decision was taken based on the heuristic subspacing scheme. Fifth, call base learners and build the model. Sixth, use the model for prediction purpose on test set of the data. The results show the advancement of the adaptive RSSL algorithm in most of the cases compared with the synonym (conventional) machine learning algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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