为了有效集成基于主体的模型(Agent Based Model,ABM)和地理信息系统(Geographical Information System,GIS),将经典地理信息系统的功能从着重宏观地理格局的描述扩展到注重微观行为机制的刻画,作者提出并设计了一个具备网格计算能力的...为了有效集成基于主体的模型(Agent Based Model,ABM)和地理信息系统(Geographical Information System,GIS),将经典地理信息系统的功能从着重宏观地理格局的描述扩展到注重微观行为机制的刻画,作者提出并设计了一个具备网格计算能力的集成化城市微模拟平台---Grid ABGIS。首先回顾了目前城市微模拟研究进展,通过对城市微模拟系统信息过程进行归纳和总结,从软件工程的角度提出了"七步法"城市模拟信息工程的基本框架;其次分析了通用多主体城市模拟软件平台Grid ABGIS的信息处理流程和相应的系统需求;最后对Grid ABGIS的系统结构、对象体系结构、数据模型和城市主体对象模板进行了详细设计,进而实现了一个ABGIS原型系统。展开更多
针对无线传感器网络占空比MAC协议在链路或节点失效环境下易导致严重的能量浪费问题,提出了一种基于Grid Quorum的异步低占空比M AC协议-AGQ-M AC(Asynchronous Grid Quorum M AC).AGQ-M AC采用Grid Quorum组分配信道,通过动态调配Quoru...针对无线传感器网络占空比MAC协议在链路或节点失效环境下易导致严重的能量浪费问题,提出了一种基于Grid Quorum的异步低占空比M AC协议-AGQ-M AC(Asynchronous Grid Quorum M AC).AGQ-M AC采用Grid Quorum组分配信道,通过动态调配Quorum比率得到了节点的最优占空比,并在邻节点发现过程中采用双前导序文抽样来监测信道状态,以减少节点唤醒时间从而达到能量高效.仿真实验结果表明,与其他占空比MAC协议相比,AGQ-MAC延长了网络生存时间,降低了网络能耗,提高了邻发现数据传输率,同时保持较低的平均邻发现延迟.展开更多
Computation grid is the infrastructure for the next generation internet. In the past five years, research ongrid technology has been thriving and grid technology has been widely adopted by a number of government organ...Computation grid is the infrastructure for the next generation internet. In the past five years, research ongrid technology has been thriving and grid technology has been widely adopted by a number of government organiza-tions and research institutions to establish their own large-scale resource sharing network. This paper presents a re-view of recent research on elemental grid technology. We focus on a brief overview on Grid's protocol architecture. Inthe end, we list a series of large projects to illustrate the current application situation based on the ongoing grid tech-nology and preview the tendency of grid technology in the future.展开更多
文摘为了有效集成基于主体的模型(Agent Based Model,ABM)和地理信息系统(Geographical Information System,GIS),将经典地理信息系统的功能从着重宏观地理格局的描述扩展到注重微观行为机制的刻画,作者提出并设计了一个具备网格计算能力的集成化城市微模拟平台---Grid ABGIS。首先回顾了目前城市微模拟研究进展,通过对城市微模拟系统信息过程进行归纳和总结,从软件工程的角度提出了"七步法"城市模拟信息工程的基本框架;其次分析了通用多主体城市模拟软件平台Grid ABGIS的信息处理流程和相应的系统需求;最后对Grid ABGIS的系统结构、对象体系结构、数据模型和城市主体对象模板进行了详细设计,进而实现了一个ABGIS原型系统。
文摘针对无线传感器网络占空比MAC协议在链路或节点失效环境下易导致严重的能量浪费问题,提出了一种基于Grid Quorum的异步低占空比M AC协议-AGQ-M AC(Asynchronous Grid Quorum M AC).AGQ-M AC采用Grid Quorum组分配信道,通过动态调配Quorum比率得到了节点的最优占空比,并在邻节点发现过程中采用双前导序文抽样来监测信道状态,以减少节点唤醒时间从而达到能量高效.仿真实验结果表明,与其他占空比MAC协议相比,AGQ-MAC延长了网络生存时间,降低了网络能耗,提高了邻发现数据传输率,同时保持较低的平均邻发现延迟.
文摘Computation grid is the infrastructure for the next generation internet. In the past five years, research ongrid technology has been thriving and grid technology has been widely adopted by a number of government organiza-tions and research institutions to establish their own large-scale resource sharing network. This paper presents a re-view of recent research on elemental grid technology. We focus on a brief overview on Grid's protocol architecture. Inthe end, we list a series of large projects to illustrate the current application situation based on the ongoing grid tech-nology and preview the tendency of grid technology in the future.
