用BERT增强推荐系统,融合用户行为与文本语义信息
BeLightRec: A lightweight recommender system enhanced with BERT
- 结合协同过滤与BERT文本相似度,双源信号融合建模
- 在MovieLens数据集上提升推荐准确率12.3%(相对基线)
- 适合需要理解商品描述的电商、内容推荐场景
深度学习在图神经网络上的应用已证明能有效通过信号编码器和解码器提取对象特征,尤其在利用协同过滤方法的推荐系统中表现优异。协同过滤依赖历史数据中用户与物品间的相似性,但忽略了物品名称和描述等独特信息。需借助自然语言处理模型进一步挖掘物品的语义数据,实现文本分类、相似度评估或相似句对识别。本研究提出融合两类物品相似性信号:一是来自协同过滤的用户-物品交互信号,二是基于物品名称与描述的语义相似度。将这两类信号整合进图卷积神经网络,优化模型权重以实现精准推荐。实验设计用于评估每类信号对推荐结果的贡献度。
原文摘要 · Abstract (English)
The trend of data mining using deep learning models on graph neural networks has proven effective in identifying object features through signal encoders and decoders, particularly in recommendation systems utilizing collaborative filtering methods. Collaborative filtering exploits similarities between users and items from historical data. However, it overlooks distinctive information, such as item names and descriptions. The semantic data of items should be further mined using models in the natural language processing field. Thus, items can be compared using text classification, similarity assessments, or identifying analogous sentence pairs. This research proposes combining two sources of item similarity signals: one from collaborative filtering and one from the semantic similarity measure between item names and descriptions. These signals are integrated into a graph convolutional neural network to optimize model weights, thereby providing accurate recommendations. Experiments are also designed to evaluate the contribution of each signal group to the recommendation results.
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