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Internet Technol."],"published-print":{"date-parts":[[2020,2,29]]},"abstract":"<jats:p>Recommendation systems have been widely used in large e-commerce websites, but cold start and data sparsity seriously affect the accuracy of recommendation. To solve these problems, we propose SSL-SVD, which works to mine the sparse trust between users and improve the performance of the recommendation system. Specifically, we mine sparse trust relationships by decomposing trust impact into fine-grained factors and employing the Transductive Support Vector Machine algorithm to combine these factors. Then, we incorporate both social trust and sparse trust information into the SVD++ model, which can effectively utilize the explicit and implicit influence of trust for rating prediction in the recommendation system. Experiments show that our SSL-SVD increases the trust density degree of each dataset by more than 65% and improves the recommendation accuracy by up to 4.3%.<\/jats:p>","DOI":"10.1145\/3369390","type":"journal-article","created":{"date-parts":[[2020,1,29]],"date-time":"2020-01-29T12:40:48Z","timestamp":1580301648000},"page":"1-20","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":33,"title":["SSL-SVD"],"prefix":"10.1145","volume":"20","author":[{"given":"Zhengdi","family":"Hu","sequence":"first","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Networking (TANK), College of Intelligence and Computing, Tianjin University,, Tianjin City, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guangquan","family":"Xu","sequence":"additional","affiliation":[{"name":"Tianjin Key Laboratory of Advanced Networking (TANK), College of Intelligence and Computing, Tianjin University, China and Big Data School, Qingdao Huanghai University, Qingdao, Shandong, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xi","family":"Zheng","sequence":"additional","affiliation":[{"name":"Department of Computing, Macquarie University, Sydney, New South Wales, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiang","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Intelligence and Computing, Tianjin University, Tianjin City, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhangbing","family":"Li","sequence":"additional","affiliation":[{"name":"School of Computer Science and Engineering, Hunan University of Science and Technology, Hunan, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Quan Z.","family":"Sheng","sequence":"additional","affiliation":[{"name":"Department of Computing, Macquarie University, Sydney, Australia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenjuan","family":"Lian","sequence":"additional","affiliation":[{"name":"College of Computer Science and Engineering, Shandong University of Science and Technology, Qingdao, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hequn","family":"Xian","sequence":"additional","affiliation":[{"name":"College of Computer Science and Technology, Qingdao University, Qingdao, China;"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2020,1,29]]},"reference":[{"key":"e_1_2_1_1_1","doi-asserted-by":"publisher","DOI":"10.1145\/1367497.1367525"},{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/963770.963776"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/2645710.2645766"},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/2645710.2645766"},{"key":"e_1_2_1_5_1","volume-title":"Proceedings of the 9th Cyber and Information Security Research Conference. 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