摘要
针对传统仿真路网模型在大规模路网描述及数据共享、操作与维护上的不足,提出了1种分布式交通仿真路网模型的设计与持久化方案。首先提出了三层路网模型描述方案,导入并简化了地理信息系统(GIS)数据,再现了真实路网信息。然后在此基础上设计了基于关联映射的路网数据结构,实现了数据的分层存储,同时对数据进行对象关系映射(ORM)持久化,提高了数据的可操作性与易维护性。最后给出了面向对象路网数据操作的示例。
Aiming at the deficiency of traditional road network model on description as well as share, operation and maintenance of data of large scale road network, this paper proposes a kind of design and persistence of road network for distributed traffic simulation. First of all, description of mad network with 3-layer model is proposed, and geographic information system （GIS） information is imported and simplified, which can reflect the information of real road network. Then based on this model, data structure of road network with associations is designed, thus correlative data can be stored separately. At the same time,persistence of data through object relational mapping （ORM） is realized, which facilitates its operation as well as maintenance. At last, samples of data operation oriented from objects are presented.
出处
《系统仿真技术》
2009年第3期143-148,165,共7页
System Simulation Technology
基金
国家"八六三"高技术计划资助项目(2007AA11Z127)
国家科技支撑计划资助项目(2006BAJ1804-06)
北京市教育委员会共建项目建设计划资助项目(XK100060422)
