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Explainable recommendation based on fusion representation of multi-type feature embedding

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Abstract

In e-commerce recommender systems, the sparsity of user-item rating data limits the quality of semantic embedding representation of users and items, which affects the accuracy of rating prediction. Previous studies have focused on learning attribute features or interaction features of nodes for recommendation and ignore the preference interest of rating tags in terms of attributes. In this paper, we propose a novel fusion representation method of multi-type node feature embedding for recommendation (MultiFEFR). The framework introduces rating preferences in terms of attributes and interactions and develops three kinds of feature presentations including rating-aware interaction feature embedding, rating-aware attribute feature embedding and heterogeneous attribute matched embedding. We design a multi-task joint learning strategy to optimize the accuracy of rating prediction. Experimental results show that the MultiFEFR outperforms the state-of-the-art models in MAE and RMSE metrics. Our findings are that the fusion of multi-type feature embedding can improve the accuracy of recommendation and the preference of attribute and interaction features are very explanatory for score grades.

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Data availability

Data used in this manuscript consist of publicly available standard benchmark datasets.

Notes

  1. https://grouplens.org/datasets/movielens/

  2. http://www2.informatik.uni-freiburg.de/\({}^{\sim }\)cziegler/BX/

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Funding

This work was partially supported by the National Natural Science Foundation of China (nos. 62272286, 62276162, 62072291), the Natural Science Foundation of Shanxi Province (no. 20210302123468, 202203021221001), and Shenzhen Basic Research Foundation (no. 20220819134631001).

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Authors and Affiliations

  1. Institute of Intelligent Information Processing, Shanxi University, Taiyuan, 030006, Shanxi, China

    Jianxing Zheng

  2. School of Computer and Information Technology, Shanxi University, Taiyuan, 030006, Shanxi, China

    Sen Chen, Feng Cao & Furong Peng

  3. School of Software Engineering, ShenZhen Institute of Information Technology, Shenzhen, 518172, Guangdong, China

    Mingqing Huang

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  1. Jianxing Zheng
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  2. Sen Chen
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Contributions

JZ contributed to methodology and writing—original draft. SC involved in methodology, code and editing. FC involved in investigation and methodology. FP involved in investigation and methodology. MH involved in reviewing and editing.

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Correspondence to Jianxing Zheng.

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Zheng, J., Chen, S., Cao, F. et al. Explainable recommendation based on fusion representation of multi-type feature embedding. J Supercomput 80, 10370–10393 (2024). https://doi.org/10.1007/s11227-023-05831-x

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