基于信息提取的动态OD估计理念研究

Study on the Concept of Dynamic OD Matrix Estimation Model Based on Information Extraction

由于现有动态OD估计模型大多是基于有限先验信息下的反推估计,没有充分利用已有海量交通数据库的各种信息,距离智能交通系统的实际需求仍有差距,因此,针对这一问题,在回顾动态OD估计与交通信息提取技术研究进展的基础上,提出了基于信息提取的动态OD估计理念:以各类交通检测器为主数据源,同时兼顾其他相关数据库,将信息提取理念尽可能贯穿动态OD估计始终,实时地为智能交通控制和管理系统提供动态OD矩阵,同时整合智能交通系统的功能,附加提供更为丰富的决策信息。最后,深入分析了基于信息提取的动态OD估计的研究意义,并初步提出其技术框架,为进一步的理论和技术研究奠定基础。

Most of the existing dynamic OD estimation models are generally self-contained and have certain limitations that fail to make use of existing mass transportation information fully. After reviewing the newly progress of research on dynamic OD matrix estimation and traffic information extraction technology, the conception of dynamic OD matrix estimation based on information extraction technology is proposed. Traffic detectors and relevant databases are used as data sources, the concept of information extraction runs through modem dynamic OD estimation to provide dynamic OD matrix in real time. At the same time, this method integrates its function to provide more abundant information for decision-making. This paper presents a deep analysis of the research significance, its technical framework is studied and worked out, which can be used as a technical guidance for further investigation.