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arXiv 1712.08855cs.LG
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基于成对相似正则化的迁移回归

Transfer Regression via Pairwise Similarity Regularization

University of California, Davis(加州大学戴维斯分校)

Aubrey Gress, Ian Davidson

摘要:

迁移学习方法解决了这样的情况,其中存在来自“目标”问题的很少的标记训练数据,但是来自相关“源”域的很多训练数据是可用的。然而,绝大多数迁移学习方法是针对简单设置设计的,其中源和目标预测函数几乎相同,限制了迁移学习方法对真实世界数据的适用性。我们提出了一种新的,较弱的,属性的源域,即使在源和目标预测函数发散时,也可以转移。我们的方法假设源函数和目标函数共享一个成对相似性属性,如果源函数对一对实例做出相似的预测,那么目标函数也会如此。我们提出了成对相似正则化转移,一个灵活的基于图的正则化框架,可以将这种建模假设纳入标准的监督学习算法。我们展示了用户如何将领域知识以空间连续性的形式编码到我们的正则化器中,成对的“相似性约束”以及我们的方法如何使用Nystrom近似扩展到大型数据集。最后,我们提出了积极的和消极的结果,真正的和合成数据集,并讨论当我们的成对相似性转移假设似乎在实践中举行。

英文摘要:

Transfer learning methods address the situation where little labeled training data from the "target" problem exists, but much training data from a related "source" domain is available. However, the overwhelming majority of transfer learning methods are designed for simple settings where the source and target predictive functions are almost identical, limiting the applicability of transfer learning methods to real world data. We propose a novel, weaker, property of the source domain that can be transferred even when the source and target predictive functions diverge. Our method assumes the source and target functions share a Pairwise Similarity property, where if the source function makes similar predictions on a pair of instances, then so will the target function. We propose Pairwise Similarity Regularization Transfer, a flexible graph-based regularization framework which can incorporate this modeling assumption into standard supervised learning algorithms. We show how users can encode domain knowledge into our regularizer in the form of spatial continuity, pairwise "similarity constraints" and how our method can be scaled to large data sets using the Nystrom approximation. Finally, we present positive and negative results on real and synthetic data sets and discuss when our Pairwise Similarity transfer assumption seems to hold in practice.

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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