高层体系结构中的时态数据管理

高层体系结构(HLA)是基于组件的分布式仿真的框架性技术结构，数据管理是其中的一项重要任务，尤其是对仿真运行过程中的时间相关数据的有效管理。基于日志的时态数据库模型使用一个时间值标识元组，在完整保存时间信息的同时，提高了仿真运行环境中数据管理的实时性。应用时态数据库的快照查询和模式转换技术，可以实现仿真数据的实时查询和不同仿真体系结构之间的数据转换，为仿真历史数据的运行时使用和事后分析提供了条件。数据库技术的引入弥补了HLA缺乏事务处理机制这一缺陷，扩展了其数据管理能力。比较实验表明，应用该模型对仿真运行环境中的时态数据进行管理具有更高的效率。

Temporal Data Management of High Level Architecture

High level architecture(HLA) defines an integrated approach that provides a common framework for the interconnection of interactive simulations.Data management is one of the important factors during the implementation of HLA,especially for temporal data management.A log-based temporal database model was designed,and it can manage the data of simulation in real time.The model provides both snapshot query and schema transformation functions to meet the requirement of run-time using and after-action analysis of temporal data.The latter can also help the HLA gateway to exchange data between different simulation architectures.Introduction of database technology into HLA provides the run-time infrastructure with transaction mechanism,so it can enhance the data management ability in HLA.Experiment shows that compared with the conventional database,the temporal database model can greatly improve the efficiency of temporal data management in simulation environment.