Crowd Detection in Mass Gatherings Based on Social Media Data: A Case Study of the 2014 Shanghai New Year’s Eve Stampede

by Jiexiong Duan, Weixin Zhai, Chengqi Cheng
Published 2020-11-01

A Subdivision Method to Unify the Existing Latitude and Longitude Grids

by Chengqi Cheng, Xiaochong Tong, Bo Chen, Weixin Zhai
Published 2016-09-01

Collision Detection for UAVs Based on GeoSOT-3D Grids

by Weixin Zhai, Xiaochong Tong, Shuangxi Miao, Chengqi Cheng, Fuhu Ren
Published 2019-07-01

Multiscale Spatial Polygonal Object Granularity Factor Matching Method Based on BPNN

by Daoye Zhu, Chengqi Cheng, Weixin Zhai, Yihang Li, Shizhong Li, Bo Chen
Published 2021-02-01

A Low-Altitude Flight Conflict Detection Algorithm Based on a Multilevel Grid Spatiotemporal Index

by Shuangxi Miao, Chengqi Cheng, Weixin Zhai, Fuhu Ren, Bo Zhang, Shuang Li, Junxiao Zhang, Huangchuang Zhang
Published 2019-06-01