The differences between the data integration of a dynamic database grid （DBG） and that of a distributed database system are analyzed, and three kinds of data integration strategies are given on the background of DBG...The differences between the data integration of a dynamic database grid （DBG） and that of a distributed database system are analyzed, and three kinds of data integration strategies are given on the background of DBG based on Peer to Peer （P2P） framework, including the centralized data integration （CDI） strategy, the distributed data integration （DDI） strategy and the filter-based data integration （FDDI） strategy. CDI calls all the database grid services （DGSs） at a single node, DDI disperses the DGSs to multiple nodes, while FDDI schedules the data integration nodes based on filtering the keywords returned from DGSs. The performance of these three integration strategies are compared with and analyzed by simulation experiments. FDDI is more evident for filtering the keywords with data redundancy increasing. Through the reduction of large amount of data transportation, it effectively shortens the executing time for the task and improves its efficiency.展开更多
针对当前纯电微网运行效率较低,且单独参与市场交易时缺乏竞争力等问题,构建了考虑微网间电能交互的多微网联合调度模型。首先,构建含冷热电联供(combined cooling heating and power,CCHP)系统的微网基本调度模型,并通过“以热/冷定电...针对当前纯电微网运行效率较低,且单独参与市场交易时缺乏竞争力等问题,构建了考虑微网间电能交互的多微网联合调度模型。首先,构建含冷热电联供(combined cooling heating and power,CCHP)系统的微网基本调度模型,并通过“以热/冷定电”的方式提高微网调度策略的灵活性;其次,考虑到微网间可直接进行点对点(peer to peer,P2P)交易,建立了考虑P2P交易的多微网联合调度模型;最后,对一个市场运营商与三个CCHP型微网的案例进行仿真。结果表明,所提出的调度方式进一步降低了系统的运行成本。展开更多
基金Supported by the National High-Technology Re-search and Development Program of China(2003AA414210) the National Natural Science Foundation of China (60573090)
文摘The differences between the data integration of a dynamic database grid （DBG） and that of a distributed database system are analyzed, and three kinds of data integration strategies are given on the background of DBG based on Peer to Peer （P2P） framework, including the centralized data integration （CDI） strategy, the distributed data integration （DDI） strategy and the filter-based data integration （FDDI） strategy. CDI calls all the database grid services （DGSs） at a single node, DDI disperses the DGSs to multiple nodes, while FDDI schedules the data integration nodes based on filtering the keywords returned from DGSs. The performance of these three integration strategies are compared with and analyzed by simulation experiments. FDDI is more evident for filtering the keywords with data redundancy increasing. Through the reduction of large amount of data transportation, it effectively shortens the executing time for the task and improves its efficiency.
文摘针对当前纯电微网运行效率较低,且单独参与市场交易时缺乏竞争力等问题,构建了考虑微网间电能交互的多微网联合调度模型。首先,构建含冷热电联供(combined cooling heating and power,CCHP)系统的微网基本调度模型,并通过“以热/冷定电”的方式提高微网调度策略的灵活性;其次,考虑到微网间可直接进行点对点(peer to peer,P2P)交易,建立了考虑P2P交易的多微网联合调度模型;最后,对一个市场运营商与三个CCHP型微网的案例进行仿真。结果表明,所提出的调度方式进一步降低了系统的运行成本。
