arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2402.01264cs.LG
收藏

面向零样本回归的直接辅助信息学习

Direct side information learning for zero-shot regression

ArcelorMittal(安赛乐米塔尔);University of Oviedo(奥维耶多大学);Artificial Intelligence Center(人工智能中心)

Miriam Fdez-Díaz, Elena Montañés, José Ramón Quevedo

AI总结:

针对现有零样本回归方法两阶段训练、特征与辅助信息分离优化的不足,提出一种单阶段融合特征与辅助信息的核方法,在人工和真实数据集上实现了更优性能。

摘要:

零样本学习可为无可用样本的目标(通常称为未观测目标)构建模型。在此场景下,目标辅助信息的可用性对于合理构建这些目标的模型至关重要。现有文献中有大量应对该场景的策略,但这些策略都是基于零样本分类场景专门设计的,大多应用于计算机视觉和图像分类领域,它们要么不适用于零样本回归框架,要么无法轻易扩展至该框架——零样本回归需要预测连续值而非类别标签。事实上,目前文献中严重缺乏零样本回归相关方法。近期有研究提出了两种采用两阶段流程的零样本回归方法。它们首先通过经典回归学习忽略目标辅助信息,训练得到观测目标的模型;随后利用目标辅助信息对这些观测目标模型进行聚合,进而推导得到未观测目标的模型。尽管这两种方法因对通用特征和辅助信息采取不同处理方式而表现出不错的性能,但它们将特征与辅助信息分开利用,未通过全局优化来生成未观测目标的模型。本文提出了一种新颖的方法,该方法在单阶段学习过程中同时利用特征和辅助信息,且对辅助信息进行了恰当处理,相较于将其当作通用特征的方式更合理。为此,本文提出了一种可恰当融合特征与辅助信息的特定核函数,由此得到的新方法在人工数据集和真实数据集上均表现出更优的性能。

英文摘要:

Zero-shot learning provides models for targets for which instances are not available, commonly called unobserved targets. The availability of target side information becomes crucial in this context in order to properly induce models for these targets. The literature is plenty of strategies to cope with this scenario, but specifically designed on the basis of a zero-shot classification scenario, mostly in computer vision and image classification, but they are either not applicable or easily extensible for a zero-shot regression framework for which a continuos value is required to be predicted rather than a label. In fact, there is a considerable lack of methods for zero-shot regression in the literature. Two approaches for zero-shot regression that work in a two-phase procedure were recently proposed. They first learn the observed target models through a classical regression learning ignoring the target side information. Then, they aggregate those observed target models afterwards exploiting the target side information and the models for the unobserved targets are induced. Despite both have shown quite good performance because of the different treatment they grant to the common features and to the side information, they exploit features and side information separately, avoiding a global optimization for providing the unobserved target models. The proposal of this paper is a novel method that jointly takes features and side information in a one-phase learning process, but treating side information properly and in a more deserving way than as common features. A specific kernel that properly merges features and side information is proposed for this purpose resulting in a novel approach that exhibits better performance over both artificial and real datasets.

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。

↑