公开(公告)号：US12046133B2

公开(公告)日：2024-07-23

申请号：US17553101

申请日：2021-12-16

申请人： Central South University ,  Chongqing Geomatics and Remote Sensing Center

发明人： Haifeng Li ,  Jian Peng ,  Penglong Li ,  Zezhong Ma ,  Yi Ding ,  Zelie Zhang ,  Ding Luo ,  Jiawei Zhu ,  Silu He ,  Yan Li ,  Zhenqi Cui ,  He Xiao ,  Ying Ao ,  Tao Zhang

IPC分类号： G08G1/01

CPC分类号： G08G1/0129 ,  G08G1/0133 ,  G08G1/0145

摘要： A detection method of key road-sections based on Ricci flow is provided and includes: building a weighted road network according to static road network data and actual traffic flow data; calculating initial values of Olivier Ricci curvature at different times; obtaining a weight system of making edges of the weighted road network be with a same value of Olivier Ricci curvature by a Ricci flow iterative process; and calculating direction and degree of weight change of each of the edges corresponding to road-sections, and setting a threshold to extract key road-sections. The method solves problems that the existing methods analyze the key road-sections from the topological structure of the road network without fully considering the actual distribution and transmission characteristics of the traffic flow in the network, is simple and easy; and the detection result more meet the traffic distribution and the flow of the actual road-sections.

公开(公告)号：US20220108603A1

公开(公告)日：2022-04-07

申请号：US17553101

申请日：2021-12-16

申请人： Central South University ,  Chongqing Geomatics and Remote Sensing Center

发明人： Haifeng LI ,  Jian PENG ,  Penglong LI ,  Zezhong MA ,  Yi DING ,  Zelie ZHANG ,  Ding LUO ,  Jiawei ZHU ,  Silu HE ,  Yan LI ,  Zhenqi CUI ,  He XIAO ,  Ying AO ,  Tao ZHANG

IPC分类号： G08G1/01

摘要： A detection method of key road-sections based on Ricci flow is provided and includes: building a weighted road network according to static road network data and actual traffic flow data; calculating initial values of Olivier Ricci curvature at different times; obtaining a weight system of making edges of the weighted road network be with a same value of Olivier Ricci curvature by a Ricci flow iterative process; and calculating direction and degree of weight change of each of the edges corresponding to road-sections, and setting a threshold to extract key road-sections. The method solves problems that the existing methods analyze the key road-sections from the topological structure of the road network without fully considering the actual distribution and transmission characteristics of the traffic flow in the network, is simple and easy; and the detection result more meet the traffic distribution and the flow of the actual road-sections.