1. Joint Centre for Urban Health and Security Intelligent Data Analytics, Key Laboratory of Environment Change and Resources Use in Beibu Gulf (Ministry of Education), Nanning Normal University, Nanning, PR China
2. Department of Natural Sciences, Manchester Metropolitan University (MMU), Manchester, UK
3. MMU Crime and Well-Being Big Data Centre, Manchester Metropolitan University, Manchester, UK
4. School of Mathematics and Statistics, Nanning Normal University, Nanning, PR China