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Technol."],"published-print":{"date-parts":[[2022,2,28]]},"abstract":"<jats:p>Recent years have witnessed the rapid development of car-hailing services, which provide a convenient approach for connecting passengers and local drivers using their personal vehicles. At the same time, the concern on passenger safety has gradually emerged and attracted more and more attention. While car-hailing service providers have made considerable efforts on developing real-time trajectory tracking systems and alarm mechanisms, most of them only focus on providing rescue-supporting information rather than preventing potential crimes. Recently, the newly available large-scale car-hailing order data have provided an unparalleled chance for researchers to explore the risky travel area and behavior of car-hailing services, which can be used for building an intelligent crime early warning system. To this end, in this article, we propose a Risky Area and Risky Behavior Evaluation System (RARBEs) based on the real-world car-hailing order data. In RARBEs, we first mine massive multi-source urban data and train an effective area risk prediction model, which estimates area risk at the urban block level. Then, we propose a transverse and longitudinal double detection method, which estimates behavior risk based on two aspects, including fraud trajectory recognition and fraud patterns mining. In particular, we creatively propose a bipartite graph-based algorithm to model the implicit relationship between areas and behaviors, which collaboratively adjusts area risk and behavior risk estimation based on random walk regularization. Finally, extensive experiments on multi-source real-world urban data clearly validate the effectiveness and efficiency of our system.<\/jats:p>","DOI":"10.1145\/3465059","type":"journal-article","created":{"date-parts":[[2021,12,24]],"date-time":"2021-12-24T00:43:16Z","timestamp":1640306596000},"page":"1-22","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Exploring the Risky Travel Area and Behavior of Car-hailing Service"],"prefix":"10.1145","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4561-1481","authenticated-orcid":false,"given":"Hongting","family":"Niu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Software Development Environment, Beihang University, Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hengshu","family":"Zhu","sequence":"additional","affiliation":[{"name":"Baidu Talent Intelligence Center, Baidu Inc., Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ying","family":"Sun","sequence":"additional","affiliation":[{"name":"Key Lab of Intelligent Information Processing of Chinese Academy of Sciences (CAS),Institute of Computing Technology, CAS, Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinjiang","family":"Lu","sequence":"additional","affiliation":[{"name":"Business Intelligency Lab, Baidu Inc., Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Sun","sequence":"additional","affiliation":[{"name":"East China University of Political Science and Law, Shanghai, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhiyuan","family":"Zhao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Software Development Environment, Beihang University, Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Xiong","sequence":"additional","affiliation":[{"name":"Artificial Intelligence Thrust, The Hong Kong University of Science and Technology, Guangzhou, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Lang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Software Development Environment, Beihang University, Beijing, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2021,12,23]]},"reference":[{"key":"e_1_3_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/1150402.1150459"},{"key":"e_1_3_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/3399631"},{"key":"e_1_3_1_4_1","doi-asserted-by":"publisher","DOI":"10.1145\/361002.361007"},{"key":"e_1_3_1_5_1","doi-asserted-by":"publisher","DOI":"10.1080\/13658810802231449"},{"key":"e_1_3_1_6_1","doi-asserted-by":"publisher","DOI":"10.1145\/1557019.1557042"},{"key":"e_1_3_1_7_1","doi-asserted-by":"publisher","DOI":"10.1023\/A:1010933404324"},{"key":"e_1_3_1_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/1557019.1557043"},{"key":"e_1_3_1_9_1","doi-asserted-by":"crossref","unstructured":"Francesco Calabrese Giusy Di Lorenzo Liang Liu and Carlo Ratti. 2011. 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