Before revision:  Based on trajectory  big data and the theory of mean-field , we establish an aggregated risk mean = field that contains information of all risk-spreading particles by proposing a spatio-temporal model named HiRES risk map.
After revision:  Based on trajectory big data and the mean field theory , we establish an aggregated risk mean = field that contains information of all risk-spreading particles by proposing a spatio-temporal model named HiRES risk map.