RRE: A Relevance Relation Extraction Framework for Cross-domain Recommender System at Alipay
Abstract: Prevailing embedding-based cross-domain recommendation (CDR) techniques produce embeddings individually or transfer the overall feature distribution from one domain to another. However, in real-world applications, they might be ineffective due to semantic gap across domains, which arises from divergent purposes and descriptive styles. In this work, we aim to address this challenge between Mini Program and content channel in Alipay, the largest mobile payment platform in China. To bridge utility-oriented Mini Programs and advertisement-oriented contents, we utilize side information of entities to make the entity relevance scores trustworthy. Then we introduce a knowledge graph-based model to reduce the impact of embedding vibrating from contrastive learning and the biases from the pretrained language models. Extensive experiments conducted on a large-scale Alipay offline dataset as well as an online environment demonstrated the effectiveness of our proposed framework.
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