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Eng."],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Sequential recommendation help users find interesting items by modeling the dynamic user-item interaction sequences. Due to the data sparseness problem, cross-domain sequential recommendation (CDSR) are proposed. CDSR explore rich data from a source domain to improve performance of the target domain. However, most of the existing CDSR methods are difficult to capture the temporal context of sequences and only learn user preference based on interactions of single domain, which leads to suboptimal performance. To address these shortcomings, we propose a channel-enhanced contrastive cross-domain sequential recommendation model (C<jats:sup>3<\/jats:sup>DSR). To be specific, (1) we design a feature extractor, which extends attention to the channel dimension, to extract the user\u2019s channel feature and capture the temporal contextual relationships between sequences. Then we calculate the weights of each channel by using three SE-Res2Blocks and multiply it with the channel feature to obtain user preference. (2) We concatenate the user\u2019s single-domain representation, the cross-domain representation, and the user features to make CDSR. Contrastive learning is leveraged to enhance mutual information between two domains. Experimental results show that the proposed model achieves the significant improvement of performance compared with other CDSR models on Amazon and HVIDEO datasets.<\/jats:p>","DOI":"10.1007\/s41019-024-00250-1","type":"journal-article","created":{"date-parts":[[2024,6,14]],"date-time":"2024-06-14T16:01:35Z","timestamp":1718380895000},"page":"325-340","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Channel-Enhanced Contrastive Cross-Domain Sequential Recommendation"],"prefix":"10.1007","volume":"9","author":[{"given":"Liu","family":"Yufang","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0009-0006-1679-0643","authenticated-orcid":false,"given":"Wang","family":"Shaoqing","sequence":"additional","affiliation":[]},{"given":"Li","family":"Keke","sequence":"additional","affiliation":[]},{"given":"Li","family":"Xueting","sequence":"additional","affiliation":[]},{"given":"Sun","family":"Fuzhen","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2024,6,14]]},"reference":[{"key":"250_CR1","doi-asserted-by":"crossref","unstructured":"Wang C, Yu Y, Ma W, Zhang M, Chen C, Liu Y, Ma S (2022) Towards representation alignment and uniformity in collaborative filtering. 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