{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T04:36:06Z","timestamp":1777696566083,"version":"3.51.4"},"reference-count":41,"publisher":"SAGE Publications","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IDA"],"published-print":{"date-parts":[[2024,2,3]]},"abstract":"<jats:p>Conversational recommender systems provide users with item recommendations via interactive dialogues. Existing methods using graph neural networks have been proven to be an adequate representation of the learning framework for knowledge graphs. However, the knowledge graph involved in the dialogue context is vast and noisy, especially the noise graph nodes, which restrict the primary node\u2019s aggregation to neighbor nodes. In addition, although the recurrent neural network can encode the local structure of word sequences in a dialogue context, it may still be challenging to remember long-term dependencies. To tackle these problems, we propose a sparse multi-hop conversational recommender model named SMCR, which accurately identifies important edges through matching items, thus reducing the computational complexity of sparse graphs. Specifically, we design a multi-hop attention network to encode dialogue context, which can quickly encode the long dialogue sequences to capture the long-term dependencies. Furthermore, we utilize a variational auto-encoder to learn topic information for capturing syntactic dependencies. Extensive experiments on the travel dialogue dataset show significant improvements in our proposed model over the state-of-the-art methods in evaluating recommendation and dialogue generation.<\/jats:p>","DOI":"10.3233\/ida-230148","type":"journal-article","created":{"date-parts":[[2023,9,15]],"date-time":"2023-09-15T11:12:54Z","timestamp":1694776374000},"page":"99-119","source":"Crossref","is-referenced-by-count":2,"title":["Conversational recommender based on graph sparsification and multi-hop attention"],"prefix":"10.1177","volume":"28","author":[{"given":"Yihao","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Artificial Intelligence, Chongqing University of Technology, Chongqing, China"}]},{"given":"Yuhao","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Artificial Intelligence, Chongqing University of Technology, Chongqing, China"}]},{"given":"Wei","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Big Data & Software Engineering, Chongqing University, Chongqing, China"}]},{"given":"Pengxiang","family":"Lan","sequence":"additional","affiliation":[{"name":"School of Artificial Intelligence, Chongqing University of Technology, Chongqing, China"}]},{"given":"Haoran","family":"Xiang","sequence":"additional","affiliation":[{"name":"School of Artificial Intelligence, Chongqing University of Technology, Chongqing, China"}]},{"given":"Junlin","family":"Zhu","sequence":"additional","affiliation":[{"name":"School of Artificial Intelligence, Chongqing University of Technology, Chongqing, China"}]},{"given":"Meng","family":"Yuan","sequence":"additional","affiliation":[{"name":"Institute of Artificial Intelligence, Beihang University, Beijing, China"}]}],"member":"179","reference":[{"key":"10.3233\/IDA-230148_ref1","first-page":"2349","article-title":"Leveraging historical interaction data for improving conversational recommender system","author":"Zhou","year":"2020","journal-title":"Proceedings of the 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