主要探讨了开发分布式应用程序的解决方案,以及建立基于组件应用的相关技术,其中包括:COM(Component Ob jects Model)组件模型、ⅡS(Internet Information Server)、MTS(Microsoft Transac-tionsServer)、ASP(Active Server Page)、ADO(...主要探讨了开发分布式应用程序的解决方案,以及建立基于组件应用的相关技术,其中包括:COM(Component Ob jects Model)组件模型、ⅡS(Internet Information Server)、MTS(Microsoft Transac-tionsServer)、ASP(Active Server Page)、ADO(ActiveX DataObjects)等。详细地论述了一个基于组件机械设备故障检测系统,该系统设计基于组件三层结构,易维护,易扩充,其界面友好,风格独特,使用方便,灵活是该系统的主要特点。展开更多
A new two-stage soft real-time scheduling algorithm based on priority table was proposed for task dispatch and selection in cluster systems with inaccurate parameters. The inaccurate characteristics of the system were...A new two-stage soft real-time scheduling algorithm based on priority table was proposed for task dispatch and selection in cluster systems with inaccurate parameters. The inaccurate characteristics of the system were modeled through probability analysis. By taking into account the multiple important system parameters, including task deadline, priority, session integrity and memory access locality, the algorithm is expected to achieve high quality of service. Lots of simulation results collected under different load conditions demonstrate that the algorithm can not only effectively overcome the inaccuracy of the system state, but also optimize the task rejected ratio, value realized ratio, differentiated service guaranteed ratio, and session integrity ensured ratio with the average improvement of 3.5%, 5.8%, 7.6% and 5. 5%, respectively. Compared with many existing schemes that cannen deal with the inaccurate parameters of the system, the proposed scheme can achieve the best system performance by carefully adjusting scheduling probability. The algorithm is expected to be promising in systems with soft real-time scheduling requirement such as E-commerce applications.展开更多
文摘主要探讨了开发分布式应用程序的解决方案,以及建立基于组件应用的相关技术,其中包括:COM(Component Ob jects Model)组件模型、ⅡS(Internet Information Server)、MTS(Microsoft Transac-tionsServer)、ASP(Active Server Page)、ADO(ActiveX DataObjects)等。详细地论述了一个基于组件机械设备故障检测系统,该系统设计基于组件三层结构,易维护,易扩充,其界面友好,风格独特,使用方便,灵活是该系统的主要特点。
基金Project(60573127) supported by the National Natural Science Foundation of China project(05JJ40131) supported by theNatural Science Foundation of Hunan Province
文摘A new two-stage soft real-time scheduling algorithm based on priority table was proposed for task dispatch and selection in cluster systems with inaccurate parameters. The inaccurate characteristics of the system were modeled through probability analysis. By taking into account the multiple important system parameters, including task deadline, priority, session integrity and memory access locality, the algorithm is expected to achieve high quality of service. Lots of simulation results collected under different load conditions demonstrate that the algorithm can not only effectively overcome the inaccuracy of the system state, but also optimize the task rejected ratio, value realized ratio, differentiated service guaranteed ratio, and session integrity ensured ratio with the average improvement of 3.5%, 5.8%, 7.6% and 5. 5%, respectively. Compared with many existing schemes that cannen deal with the inaccurate parameters of the system, the proposed scheme can achieve the best system performance by carefully adjusting scheduling probability. The algorithm is expected to be promising in systems with soft real-time scheduling requirement such as E-commerce applications.
