In this article,we have given a elaborate introduction about MVICH implementation underlying MPICH,and illustrated its structure ,working principle and performance. MVICH is an implementation of MPICH ADI2 base ofVIA ...In this article,we have given a elaborate introduction about MVICH implementation underlying MPICH,and illustrated its structure ,working principle and performance. MVICH is an implementation of MPICH ADI2 base ofVIA protocol, using VIA descriptors queue for transferring data in its low layer. It has some characters such as userlevel communications, without kernel trapping, memory binding and registering and so on. MVICH uses buffer(region)management,four transfer protocol,converting dynamically at runtime,and special flow control etc. For highspeed LAN,the combination of VIA and MPI can give a greater improvement for the performance of MPI applica-tions ,and exert those applications' potential ability. It will become the main project of research and development in future.展开更多
The Virtual Interface Architecture(VIA) is a kind of user-level communication architectures and it has become industrial standard of cluster communication.In order to evaluate different VIA implemention under unified ...The Virtual Interface Architecture(VIA) is a kind of user-level communication architectures and it has become industrial standard of cluster communication.In order to evaluate different VIA implemention under unified criterion, a micro-benchmark ,which called VIABM is designed. Used some cases demonstrating this micro-benchmark also can slove the problem mentioned above.展开更多
在电力市场由计划向市场转型过程中,工商业(industrial and commercial,I&C)用户逐步由目录电价转向市场化定价。为推动工商业用户全部进入市场,中国建立了代理购电机制,暂未直接参与市场购电的工商业用户由电网公司以代理方式购电...在电力市场由计划向市场转型过程中,工商业(industrial and commercial,I&C)用户逐步由目录电价转向市场化定价。为推动工商业用户全部进入市场,中国建立了代理购电机制,暂未直接参与市场购电的工商业用户由电网公司以代理方式购电,确保工商业市场化电价改革政策平稳实施。由此,首先分析现行电网企业代理购电价格形成机制,建立代理购电价格模型,针对由购电结构差异所产生的代理购电-市场化用户价差及代理购电用户价格季节波动大问题,提出基于计划-市场电量分配的代理购电价格优化方法;随后结合规划周期内计划-市场电量供需平衡关系,以工商业市场用户和代理购电用户价差最小为目标、代理购电价格波动幅值为约束条件,优化调整风光发电量进入计划和市场电量比例以及外购电月度分配比例,实现代理购电用户价格的合理动态调整;最后基于国内某省年度源-荷数据进行算例分析。分析结果表明:所提代理购电价格优化方法可以有效降低两类用户价差、代理购电价格波动,对电网代理购电机制的顺利运行和工商业用户有序进入市场起到积极的作用。展开更多
文摘In this article,we have given a elaborate introduction about MVICH implementation underlying MPICH,and illustrated its structure ,working principle and performance. MVICH is an implementation of MPICH ADI2 base ofVIA protocol, using VIA descriptors queue for transferring data in its low layer. It has some characters such as userlevel communications, without kernel trapping, memory binding and registering and so on. MVICH uses buffer(region)management,four transfer protocol,converting dynamically at runtime,and special flow control etc. For highspeed LAN,the combination of VIA and MPI can give a greater improvement for the performance of MPI applica-tions ,and exert those applications' potential ability. It will become the main project of research and development in future.
文摘The Virtual Interface Architecture(VIA) is a kind of user-level communication architectures and it has become industrial standard of cluster communication.In order to evaluate different VIA implemention under unified criterion, a micro-benchmark ,which called VIABM is designed. Used some cases demonstrating this micro-benchmark also can slove the problem mentioned above.
文摘在电力市场由计划向市场转型过程中,工商业(industrial and commercial,I&C)用户逐步由目录电价转向市场化定价。为推动工商业用户全部进入市场,中国建立了代理购电机制,暂未直接参与市场购电的工商业用户由电网公司以代理方式购电,确保工商业市场化电价改革政策平稳实施。由此,首先分析现行电网企业代理购电价格形成机制,建立代理购电价格模型,针对由购电结构差异所产生的代理购电-市场化用户价差及代理购电用户价格季节波动大问题,提出基于计划-市场电量分配的代理购电价格优化方法;随后结合规划周期内计划-市场电量供需平衡关系,以工商业市场用户和代理购电用户价差最小为目标、代理购电价格波动幅值为约束条件,优化调整风光发电量进入计划和市场电量比例以及外购电月度分配比例,实现代理购电用户价格的合理动态调整;最后基于国内某省年度源-荷数据进行算例分析。分析结果表明:所提代理购电价格优化方法可以有效降低两类用户价差、代理购电价格波动,对电网代理购电机制的顺利运行和工商业用户有序进入市场起到积极的作用。
