Identifying Insufficient Data Coverage for Ordinal Continuous-Valued Attributes

Identifying Insufficient Data Coverage for Ordinal Continuous-Valued Attributes
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识别序数连续值属性的数据覆盖不足

DOI:
10.1145/3448016.3457315
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发表时间:
2021
期刊:
ACM International Conference on Management of Data {SIGMOD}
影响因子:
--
通讯作者:
Jagadish, H. V.
Jagadish, H. V.
中科院分区:
--
文献类型:
--
作者:
Asudeh, Abolfazl;Shahbazi, Nima;Jin, Zhongjun;Jagadish, H. V.

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适当的训练数据是构建良好的机器学习模型的必要条件。在本文中,我们通过形式化直觉来研究序数和连续值属性的覆盖概念,即学习模型只能在训练数据集中有“足够”相似数据点的数据点上进行准确预测。我们开发了一种有效的算法,通过连接到 Voronoi 图来识别低维属性特征空间中未覆盖的区域。我们还开发了一种用于高维属性空间的随机近似算法。我们通过对真实数据集进行大量实验来评估我们的算法。
Appropriate training data is a requirement for building good machine-learned models. In this paper, we study the notion of coverage for ordinal and continuous-valued attributes, by formalizing the intuition that the learned model can accurately predict only at data points for which there are "enough" similar data points in the training data set.We develop an efficient algorithm to identify uncovered regions in low-dimensional attribute feature space, by making a connection to Voronoi diagrams. We also develop a randomized approximation algorithm for use in high-dimensional attribute space. We evaluate our algorithms through extensive experiments on real datasets.
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