Papers › TuckerDNCaching: high-quality negative sampling with tucker decomposition
TuckerDNCaching: high-quality negative sampling with tucker decomposition
Tiroshan Madushanka, Ryutaro Ichise
Knowledge Graph Embedding (KGE) translates entities and relations of knowledge graphs (KGs) into a low-dimensional vector space, enabling an efficient way of predicting missing facts. Generally, KGE models are trained with positive and negative examples, discriminating positives against negatives. Nevertheless, KGs contain only positive facts; KGE training requires generating negatives from non-observed ones in KGs, referred to as negative sampling. Since KGE models are sensitive to inputs, negative sampling becomes crucial, and the quality of the negatives becomes critical in KGE training. Generative adversarial networks (GAN) and self-adversarial methods have recently been utilized in negative sampling to address the vanishing gradients observed with early negative sampling methods. However, they introduce the problem of false negatives with high probability. In this paper, we extend the idea of reducing false negatives by adopting a Tucker decomposition representation, i.e., TuckerDNCaching, to enhance the semantic soundness of latent relations among entities by introducing a relation feature space. TuckerDNCaching ensures the quality of generated negative samples, and the experimental results reflect that our proposed negative sampling method outperforms the existing state-of-the-art negative sampling methods.
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